HUANENG POWER INTERNATIONAL INC (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line Label Object Class Period Type Balance Report ElementName
1 00000 - Document - Document and Entity Information Network

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http://www.hpi.com.cn/role/DocumentAndEntityInformation
2 Document Information [table] Table

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dei:DocumentInformationTable
3 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
4 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
5 A shares [member] Member hnp:ASharesMember
6 Overseas listed foreign shares [member] Member hnp:OverseasListedForeignSharesMember
7 Document Information [line items] LineItems dei:DocumentInformationLineItems
8 Document Type Concept (Submission Type) For Period dei:DocumentType
9 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
10 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
11 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
12 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
13 Entity Registrant Name Concept (Text/String) For Period dei:EntityRegistrantName
14 Entity Central Index Key Concept (CIK Number) For Period dei:EntityCentralIndexKey
15 Current Fiscal Year End Date Concept (Month/Day) For Period dei:CurrentFiscalYearEndDate
16 Entity Filer Category Concept (Filer Category) For Period dei:EntityFilerCategory
17 Entity Common Stock, Shares Outstanding Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
18 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
19 Entity Well-known Seasoned Issuer Concept (Yes/No) For Period dei:EntityWellKnownSeasonedIssuer
20 Trading Symbol Concept (Text/String) For Period dei:TradingSymbol
21 Entity Emerging Growth Company Concept (Yes/No) For Period dei:EntityEmergingGrowthCompany
22 Entity shell company Concept (Yes/No) For Period dei:EntityShellCompany
23 00100 - Statement - Consolidated Statements of Comprehensive Income Network

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http://www.hpi.com.cn/role/ConsolidatedStatementsOfComprehensiveIncome
24 Implied Table Table

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implied:Table
25 Consolidated Statements of Comprehensive Income [abstract] Abstract ifrs-full:StatementOfComprehensiveIncomeAbstract
26 Operating revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
27 Tax and levies on operations Concept (Monetary) For Period Debit ifrs-full:TaxExpenseOtherThanIncomeTaxExpense
28 Operating expenses Abstract hnp:OperatingExpensesAbstract
29 Fuel Concept (Monetary) For Period Debit ifrs-full:FuelExpense
30 Maintenance Concept (Monetary) For Period Debit ifrs-full:RepairsAndMaintenanceExpense
31 Depreciation Concept (Monetary) For Period Debit ifrs-full:DepreciationExpense
32 Labor Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
33 Service fees on transmission and transformer facilities of HIPDC Concept (Monetary) For Period Debit ifrs-full:EnergyTransmissionCharges
34 Purchase of electricity Concept (Monetary) For Period Debit ifrs-full:EnergyExpense
35 Others Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByNature
36 Total operating expenses Concept (Monetary) For Period Debit ifrs-full:OperatingExpense
37 Profit from operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
38 Interest income Concept (Monetary) For Period Credit ifrs-full:RevenueFromInterest
39 Financial expenses, net Abstract hnp:FinancialExpensesNetAbstract
40 Interest expense Concept (Monetary) For Period Debit ifrs-full:InterestExpense
41 Exchange (loss)/gain and bank charges, net Concept (Monetary) For Period Credit hnp:ExchangeGainLossAndBankChargesNet
42 Total financial expenses, net Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
43 Share of profits less losses of associates and joint ventures Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
44 Gain/(loss) on fair value changes of financial assets/liabilities Concept (Monetary) For Period Credit hnp:GainLossOnFairValueChangesOfFinancialAssetsLiabilities
45 Other investment (loss)/income Concept (Monetary) For Period Credit hnp:OtherInvestmentIncome
46 Profit before income tax expense Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
47 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
48 Net profit Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
49 Other comprehensive (loss)/income, net of tax Abstract ifrs-full:OtherComprehensiveIncomeAbstract
50 Items that will not be reclassified to profit or loss: Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
51 Fair value changes of other equity instrument investments Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments
52 Share of other comprehensive loss of investees accounted for under the equity method Concept (Monetary) For Period Credit ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax
53 Items that may be reclassified subsequently to profit or loss: Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
54 Fair value changes of available-for-sale financial assets Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnRemeasuringAvailableforsaleFinancialAssetsNetOfTax
55 Gain on disposal of available-for-sale financial assets reclassified to profit or loss Concept (Monetary) For Period Debit ifrs-full:ReclassificationAdjustmentsOnAvailableforsaleFinancialAssetsNetOfTax
56 Share of other comprehensive (loss)/income of investees accounted for under the equity method Concept (Monetary) For Period Credit ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax
57 Effective portion of cash flow hedges Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnCashFlowHedgesNetOfTax
58 Translation differences of the financial statements of foreign operations Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax
59 Other comprehensive (loss)/income, net of tax Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
60 Total comprehensive income Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
61 Net profit attributable to: Abstract ifrs-full:ProfitLossAttributableToAbstract
62 Equity holders of the Company Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
63 Non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
64 Net profit Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
65 Total comprehensive income/(loss) attributable to: Abstract ifrs-full:ComprehensiveIncomeAttributableToAbstract
66 Equity holders of the Company Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
67 Non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
68 Total comprehensive income Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
69 Earnings per share attributable to the shareholders of the Company (expressed in RMB per share) Abstract ifrs-full:EarningsPerShareAbstract
70 Basic and diluted Concept (Share) For Period ifrs-full:BasicAndDilutedEarningsLossPerShare
71 00200 - Statement - Consolidated Statements of Financial Position Network

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http://www.hpi.com.cn/role/ConsolidatedStatementsOfFinancialPosition
72 Implied Table Table

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implied:Table
73 Consolidated Statements of Financial Position [abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
74 ASSETS Abstract ifrs-full:AssetsAbstract
75 Non-current assets Abstract ifrs-full:NoncurrentAssetsAbstract
76 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
77 Investments in associates and joint ventures Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
78 Investment property Concept (Monetary) As Of Debit ifrs-full:InvestmentProperty
79 Available-for-sale financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAvailableforsale
80 Other equity instrument investments Concept (Monetary) As Of Debit ifrs-full:NoncurrentInvestmentsInEquityInstrumentsDesignatedAtFairValueThroughOtherComprehensiveIncome
81 Land use rights Concept (Monetary) As Of Debit hnp:LandUseRights
82 Power generation licenses Concept (Monetary) As Of Debit ifrs-full:LicencesAndFranchises
83 Mining rights Concept (Monetary) As Of Debit hnp:MiningRights
84 Deferred income tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
85 Derivative financial assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentDerivativeFinancialAssets
86 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
87 Other non-current assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentAssets
88 Total non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
89 Current assets Abstract ifrs-full:CurrentAssetsAbstract
90 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
91 Other receivables and assets Concept (Monetary) As Of Debit hnp:OtherReceivablesAndAssets
92 Accounts receivable Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
93 Contract assets Concept (Monetary) As Of Debit ifrs-full:CurrentContractAssets
94 Derivative financial assets Concept (Monetary) As Of Debit ifrs-full:CurrentDerivativeFinancialAssets
95 Bank balances and cash Concept (Monetary) As Of Debit hnp:CashAndCashEquivalentsIncludingCashRestricted
96 Assets held for sale Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSale
97 Total current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
98 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
99 EQUITY AND LIABILITIES Abstract ifrs-full:EquityAndLiabilitiesAbstract
100 Capital and reserves attributable to equity holders of the Company Abstract hnp:CapitalAndReservesAttributableToEquityHoldersOfCompanyAbstract
101 Share capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
102 Other equity instruments Concept (Monetary) As Of Credit ifrs-full:OtherEquityInterest
103 Capital surplus Concept (Monetary) As Of Credit ifrs-full:CapitalReserve
104 Surplus reserves Concept (Monetary) As Of Credit hnp:SurplusReserves
105 Currency translation differences Concept (Monetary) As Of Credit ifrs-full:ReserveOfExchangeDifferencesOnTranslation
106 Retained earnings Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
107 Capital and reserves attributable to equity holders of the Company Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
108 Non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
109 Total equity Concept (Monetary) As Of Credit ifrs-full:Equity
110 Non-current liabilities Abstract ifrs-full:NoncurrentLiabilitiesAbstract
111 Long-term loans Concept (Monetary) As Of Credit ifrs-full:NoncurrentPortionOfNoncurrentLoansReceived
112 Long-term bonds Concept (Monetary) As Of Credit ifrs-full:NoncurrentPortionOfNoncurrentBondsIssued
113 Deferred income tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
114 Derivative financial liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentDerivativeFinancialLiabilities
115 Other non-current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentLiabilities
116 Total non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
117 Current liabilities Abstract ifrs-full:CurrentLiabilitiesAbstract
118 Accounts payable and other liabilities Concept (Monetary) As Of Credit hnp:AccountsPayableAndOtherLiabilities
119 Contract liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentContractLiabilities
120 Taxes payable Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
121 Dividends payable Concept (Monetary) As Of Credit ifrs-full:CurrentDividendPayables
122 Derivative financial liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentDerivativeFinancialLiabilities
123 Short-term bonds Concept (Monetary) As Of Credit hnp:CurrentBondsIssued
124 Short-term loans Concept (Monetary) As Of Credit hnp:CurrentLoansReceived
125 Current portion of long-term loans Concept (Monetary) As Of Credit hnp:CurrentPortionOfLongTermLoans
126 Current portion of long-term bonds Concept (Monetary) As Of Credit hnp:CurrentPortionOfNonCurrentBondsIssued
127 Current portion of other non-current liabilities Concept (Monetary) As Of Credit hnp:CurrentPortionOfOtherNonCurrentLiabilities
128 Liabilities held for sale Concept (Monetary) As Of Credit ifrs-full:LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale
129 Total current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
130 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
131 Total equity and liabilities Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
132 00300 - Statement - Consolidated Statements of Changes in Equity Network

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http://www.hpi.com.cn/role/ConsolidatedStatementsOfChangesInEquity
133 Statement of changes in equity [table] Table

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ifrs-full:StatementOfChangesInEquityTable
134 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
135 Total equity [member] Member ifrs-full:EquityMember
136 Attributable to equity holders of the Company [member] Member ifrs-full:EquityAttributableToOwnersOfParentMember
137 Capital surplus [member] Member ifrs-full:CapitalReserveMember
138 Share capital [member] Member ifrs-full:IssuedCapitalMember
139 Other equity instruments [member] Member ifrs-full:OtherEquityInterestMember
140 Share premium [member] Member ifrs-full:SharePremiumMember
141 Hedging reserve [member] Member ifrs-full:ReserveOfCashFlowHedgesMember
142 Fair value Reserve (non-recycling) [member] Member hnp:FairValueReserveNonRecyclingMember
143 Other reserve in other comprehensive income [member] Member hnp:OtherReserveInOtherComprehensiveIncomeMember
144 Available-for-sale financial assets revaluation reserve [member] Member ifrs-full:ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssetsMember
145 Other capital reserve [member] Member hnp:OtherCapitalReserveMember
146 Surplus reserve [member] Member hnp:SurplusReserveMember
147 Currency translation differences [member] Member ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
148 Retained earnings [member] Member ifrs-full:RetainedEarningsMember
149 Non-controlling interests [member] Member ifrs-full:NoncontrollingInterestsMember
150 Statement of changes in equity [line items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
151 Balance at end of prior year Concept (Monetary) As Of Credit ifrs-full:Equity
152 Impact on initial application of IFRS 9 (Note 2 (b) (i)) Concept (Monetary) As Of Credit hnp:EquityAdjustmentsIncreaseDecreaseThroughChangesInAccountingPolicies
153 Balance at period start Concept (Monetary) As Of Credit hnp:EquityCarryingAmountImmediatelyAfterInitialApplicationOfIfrs9
154 Profit Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
155 Other comprehensive income/(loss): Abstract ifrs-full:OtherComprehensiveIncomeAbstract
156 Fair value changes of other equity instrument investments - gross Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesFromInvestmentsInEquityInstruments
157 Fair value changes of other equity instrument investments - Tax Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToInvestmentsInEquityInstrumentsOfOtherComprehensiveIncome
158 Fair value changes of available-for-sale financial assets - gross Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnRemeasuringAvailableforsaleFinancialAssetsBeforeTax
159 Gain on disposal of available-for-sale financial assets reclassified to profit or loss - gross Concept (Monetary) For Period Credit hnp:GainsLossesOnDisposalOfAvailableForSaleFinancialAssetsReclassifiedToProfitOrLossBeforeTax
160 Fair value changes of and gain on disposal of available-for-sale financial assets - tax Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToAvailableforsaleFinancialAssetsOfOtherComprehensiveIncome
161 Shares of other comprehensive income of investees - accounted for under the equity method - gross Concept (Monetary) For Period Credit ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodBeforeTax
162 Shares of other comprehensive income of investees - accounted for under the equity method - tax Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
163 Changes in fair value of effective portion of cash flow hedges - gross Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnCashFlowHedgesBeforeTax
164 Changes in fair value of effective portion of cash flow hedges - tax Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome
165 Cash flow hedges recorded in shareholders' equity reclassified to inventories - gross Concept (Monetary) For Period Credit hnp:CashFlowHedgesRecordedInShareholdersEquityReclassifiedToInventoriesGross
166 Cash flow hedges recorded in shareholders' equity reclassified to inventories - tax Concept (Monetary) For Period Debit hnp:CashFlowHedgesRecordedInShareholdersEquityReclassifiedToInventoriesTax
167 Cash flow hedges recorded in shareholders' equity reclassified to exchange gain and bank charges, net - gross Concept (Monetary) For Period Credit hnp:CashFlowHedgesRecordedInShareholdersEquityReclassifiedToExchangeGainAndBankChargesNetGross
168 Cash flow hedges recorded in shareholders' equity reclassified to exchange gain and bank charges, net - tax Concept (Monetary) For Period Debit hnp:CashFlowHedgesRecordedInShareholdersEquityReclassifiedToExchangeGainAndBankChargesNetTax
169 Cash flow hedges recorded in shareholders' equity reclassified to interest expense - gross Concept (Monetary) For Period Credit hnp:CashFlowHedgesRecordedInShareholdersEquityReclassifiedToInterestExpenseGross
170 Cash flow hedges recorded in shareholders' equity reclassified to interest expense - tax Concept (Monetary) For Period Debit hnp:CashFlowHedgesRecordedInShareholdersEquityReclassifiedToInterestExpenseTax
171 Currency translation differences Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax
172 Total comprehensive income Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
173 Business combinations (Note 41) Concept (Monetary) For Period Credit hnp:IncreaseDecreaseOfEquityThroughBusinessCombinations
174 Issue of new A shares, net of issue expenses (Note 21) Concept (Monetary) For Period Credit hnp:IssueOfOrdinarySharesNetOfIssuanceExpenses
175 Issue of perpetual corporate bonds Concept (Monetary) For Period Credit hnp:PerpetualCorporateBondsIncreaseDecreaseInCurrentPeriodNewIssues
176 Issue of other equity instruments (Note 22) Concept (Monetary) For Period Credit hnp:OtherEquityInstrumentsIncreaseDecreaseInCurrentPeriodNewIssues
177 Dividends relating to last year (Note 24) Concept (Monetary) For Period Debit ifrs-full:DividendsPaid
178 Cumulative distribution of other equity instruments (Note 24) Concept (Monetary) For Period Debit hnp:PaymentOfCumulativeDistributionOfOtherEquityInstruments
179 Net capital injection from non-controlling interests of subsidiaries Concept (Monetary) For Period Credit hnp:NetCapitalInjectionsFromNonControllingInterestsOfSubsidiaries
180 Disposal of non-controlling interests of a subsidiary Concept (Monetary) For Period Credit hnp:DisposalOfNonControllingInterestsOfSubsidiaries
181 Acquisition of non-controlling interests of subsidiaries Concept (Monetary) For Period Credit hnp:AcquisitionOfNonControllingInterestsOfSubsidiaries
182 Share of other capital reserve of investees accounted for under the equity method Concept (Monetary) For Period Debit hnp:ShareOfOtherCapitalReserveOfAssociatesAndJointVenturesAccountedForUsingEquityMethodNetOfTax
183 Disposal of subsidiaries Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughDisposalOfSubsidiary
184 Balance at period end Concept (Monetary) As Of Credit ifrs-full:Equity
185 00400 - Statement - Consolidated Statements of Cash Flows Network

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http://www.hpi.com.cn/role/ConsolidatedStatementsOfCashFlows
186 Implied Table Table

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implied:Table
187 Consolidated Statements of Cash Flows [abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
188 CASH FLOWS FROM OPERATING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
189 Profit before income tax expense Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
190 Adjustments to reconcile profit before income tax expense to net cash provided by operating activities: Abstract ifrs-full:AdjustmentsForReconcileProfitLossAbstract
191 Depreciation Concept (Monetary) For Period Debit ifrs-full:DepreciationExpense
192 Provision for impairment loss on property, plant and equipment Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
193 Provision for impairment loss on goodwill Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill
194 Provision for impairment loss on mining rights Concept (Monetary) For Period Debit hnp:ImpairmentLossRecognisedInProfitOrLossMiningRights
195 Provision for impairment loss on land use rights Concept (Monetary) For Period Debit hnp:ImpairmentLossRecognisedInProfitOrLossLandUseRights
196 Provision for other non-current assets Concept (Monetary) For Period Debit hnp:ImpairmentLossRecognisedInProfitOrLossOtherNonCurrentAssets
197 Amortization of land use rights Concept (Monetary) For Period Debit hnp:AmortizationOfLandUseRights
198 Amortization of other non-current assets Concept (Monetary) For Period Debit hnp:AmortizationOfOtherNonCurrentAssets
199 Amortization of employee housing subsidies Concept (Monetary) For Period Debit hnp:AmortizationOfEmployeeHousingSubsidies
200 Recognition of provision for loss allowance Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossTradeAndOtherReceivables
201 Recognition/(reversal) of provision for inventory obsolescence Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossInventories
202 (Gain)/loss on fair value changes of financial assets/liabilities Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForFairValueGainsLosses
203 Other investment loss/(income) Concept (Monetary) For Period Credit hnp:OtherInvestmentIncome
204 Net (gain)/loss on disposals of non-current assets Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets
205 Unrealized exchange loss/(gain), net Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains
206 Share of profits less losses of associates and joint ventures Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForUndistributedProfitsOfAssociates
207 Interest income Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForInterestIncome
208 Interest expense Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForInterestExpense
209 Others Concept (Monetary) For Period Credit hnp:AdjustmentsForCashInflowsOutflowsOtherThanChangesInWorkingCapitalClassifiedAsOperatingActivities
210 Changes in working capital, net of effects of acquisitions Abstract hnp:ChangesInWorkingCapitalNetOfEffectsOfAcquisitionsAbstract
211 Inventories Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
212 Other receivables and assets Concept (Monetary) For Period Debit hnp:AdjustmentsForDecreaseIncreaseInOtherReceivablesAndAssets
213 Accounts receivable Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
214 Contract assets Concept (Monetary) For Period Debit hnp:AdjustmentsForDecreaseIncreaseInCurrentContractAssets
215 Restricted cash Concept (Monetary) For Period Debit hnp:AdjustmentsForDecreaseIncreaseInRestrictedCash
216 Accounts payable and other liabilities Concept (Monetary) For Period Debit hnp:AdjustmentsForIncreaseDecreaseInAccountsPayableAndOtherLiabilities
217 Contract liabilities Concept (Monetary) For Period Debit hnp:AdjustmentsForIncreaseDecreaseInCurrentContractLiabilities
218 Taxes payable Concept (Monetary) For Period Debit hnp:AdjustmentsForIncreaseDecreaseInTaxesPayable
219 Interest received Concept (Monetary) For Period Debit ifrs-full:InterestReceivedClassifiedAsOperatingActivities
220 Income tax expense paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidClassifiedAsOperatingActivities
221 Net cash provided by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
222 CASH FLOWS FROM INVESTING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
223 Payment for the purchase of property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
224 Proceeds from disposal of property, plant and equipment, land use rights and other non-current assets Concept (Monetary) For Period Debit ifrs-full:ProceedsFromDisposalsOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets
225 Prepayments of land use rights Concept (Monetary) For Period Credit hnp:PrepaymentsOfLandUseRights
226 Payment for the purchase of other non-current assets Concept (Monetary) For Period Credit ifrs-full:PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities
227 Cash dividends received Concept (Monetary) For Period Debit ifrs-full:DividendsReceivedClassifiedAsInvestingActivities
228 Payment for investment in associates and joint ventures Concept (Monetary) For Period Credit ifrs-full:PurchaseOfInterestsInInvestmentsAccountedForUsingEquityMethod
229 Cash paid for acquiring available-for-sale financial assets Concept (Monetary) For Period Credit ifrs-full:PurchaseOfAvailableforsaleFinancialAssets
230 Cash paid for acquiring other equity instrument investments Concept (Monetary) For Period Credit hnp:PurchaseOfFairValueOfInvestmentsInEquityInstrumentsDesignatedAtFairValueThroughOtherComprehensiveIncome
231 Cash consideration paid for acquisition of subsidiaries, net of cash acquired Concept (Monetary) For Period Credit hnp:CashConsiderationPaidForAcquisitionOfSubsidiariesNetOfCashAcquiredClassifiedAsInvestingActivities
232 Cash received from disposal of a subsidiary, net of cash of the subsidiaries Concept (Monetary) For Period Debit hnp:CashReceivedFromDisposalOfSubsidiariesClassifiedAsInvestingActivities
233 Cash received from disposal of available-for-sale financial assets Concept (Monetary) For Period Debit ifrs-full:ProceedsFromDisposalOrMaturityOfAvailableforsaleFinancialAssets
234 Others Concept (Monetary) For Period Debit ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities
235 Net cash used in investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
236 CASH FLOWS FROM FINANCING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
237 Issuance of short-term bonds Concept (Monetary) For Period Debit hnp:ProceedsFromIssuanceOfCurrentBondsIssued
238 Repayments of short-term bonds Concept (Monetary) For Period Credit hnp:RepaymentsOfCurrentBondsIssued
239 Proceeds from short-term loans Concept (Monetary) For Period Debit hnp:ProceedsFromCurrentLoansReceived
240 Repayments of short-term loans Concept (Monetary) For Period Credit hnp:RepaymentsOfCurrentLoansReceived
241 Proceeds from long-term loans Concept (Monetary) For Period Debit hnp:ProceedsFromNonCurrentLoansReceived
242 Repayments of long-term loans Concept (Monetary) For Period Credit hnp:RepaymentsOfNonCurrentLoansReceived
243 Issuance of long-term bonds Concept (Monetary) For Period Debit hnp:ProceedsFromIssuanceOfNonCurrentBondsIssued
244 Repayments of long-term bonds Concept (Monetary) For Period Credit hnp:RepaymentsOfNonCurrentBondsIssued
245 Interest paid Concept (Monetary) For Period Credit ifrs-full:InterestPaidClassifiedAsFinancingActivities
246 Net proceeds from the issuance of new shares Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssueOfOrdinaryShares
247 Net proceeds from the issuance of other equity instruments Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssuingOtherEquityInstruments
248 Net capital injection from non-controlling interests of subsidiaries Concept (Monetary) For Period Debit ifrs-full:ProceedsFromContributionsOfNoncontrollingInterests
249 Dividends paid to shareholders of the Company Concept (Monetary) For Period Credit ifrs-full:DividendsPaidToEquityHoldersOfParentClassifiedAsFinancingActivities
250 Dividends paid to non-controlling interests of subsidiaries Concept (Monetary) For Period Credit ifrs-full:DividendsPaidToNoncontrollingInterestsClassifiedAsFinancingActivities
251 Government grants Concept (Monetary) For Period Debit ifrs-full:ProceedsFromGovernmentGrantsClassifiedAsFinancingActivities
252 Payment for finance leasing Concept (Monetary) For Period Credit ifrs-full:PaymentsOfFinanceLeaseLiabilitiesClassifiedAsFinancingActivities
253 Others Concept (Monetary) For Period Debit ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities
254 Net cash (used in)/generated from financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
255 Effect of exchange rate fluctuations on cash held Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
256 NET INCREASE IN CASH AND CASH EQUIVALENTS Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
257 Cash and cash equivalents as at beginning of the year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
258 CASH AND CASH EQUIVALENTS AS AT END OF THE YEAR Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
259 10100 - Disclosure - Company organization and principal activities Network

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260 Implied Table Table

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261 Company organization and principal activities [abstract] Abstract hnp:CompanyOrganizationAndPrincipalActivitiesAbstract
262 Company organization and principal activities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory
263 10200 - Disclosure - Principal accounting policies Network

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264 Implied Table Table

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265 Principal accounting policies [abstract] Abstract hnp:PrincipalAccountingPoliciesAbstract
266 Principal accounting policies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
267 10300 - Disclosure - Financial and capital risks management Network

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http://www.hpi.com.cn/role/FinancialAndCapitalRisksManagement
268 Implied Table Table

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269 Financial and capital risks management [abstract] Abstract hnp:FinancialAndCapitalRisksManagementAbstract
270 Financial and capital risks management Concept (Text Block (HTML)) For Period hnp:FinancialAndCapitalRisksManagementTextBlock
271 10400 - Disclosure - Critical accounting estimates and judgments Network

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272 Implied Table Table

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273 Critical accounting estimates and judgments [abstract] Abstract hnp:CriticalAccountingEstimatesAndJudgmentsAbstract
274 Critical accounting estimates and judgments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAccountingJudgementsAndEstimatesExplanatory
275 10500 - Disclosure - Revenue and segment information Network

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276 Implied Table Table

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277 Revenue and segment information [abstract] Abstract ifrs-full:RevenueAbstract
278 Revenue and segment information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRevenueExplanatory
279 10600 - Disclosure - Profit before income tax expense Network

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280 Implied Table Table

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281 Profit before income tax expense [abstract] Abstract hnp:ProfitBeforeIncomeTaxExpenseAbstract
282 Profit before income tax expense Concept (Text Block (HTML)) For Period hnp:ProfitBeforeIncomeTaxExpenseTextBlock
283 10700 - Disclosure - Property, plant and equipment Network

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284 Implied Table Table

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285 Property, plant and equipment [abstract] Abstract ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
286 Property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
287 10800 - Disclosure - Investments in associates and joint ventures Network

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http://www.hpi.com.cn/role/InvestmentsInAssociatesAndJointVentures
288 Implied Table Table

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289 Investments in associates and joint ventures [abstract] Abstract hnp:InvestmentsInAssociatesAndJointVenturesAbstract
290 Investments in associates and joint ventures Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory
291 10900 - Disclosure - Investments in subsidiaries Network

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292 Implied Table Table

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293 Investments in subsidiaries [abstract] Abstract hnp:InvestmentsInSubsidiariesAbstract
294 Investments in subsidiaries Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory
295 11000 - Disclosure - Other equity instrument investments Network

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http://www.hpi.com.cn/role/OtherEquityInstrumentInvestments
296 Implied Table Table

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297 Other equity instrument investments [abstract] Abstract ifrs-full:DisclosureOfFairValueOfInvestmentsInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeAbstract
298 Other equity instrument investments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFairValueOfEachInvestmentInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeExplanatory
299 11100 - Disclosure - Land use rights Network

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300 Implied Table Table

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301 Land use rights [abstract] Abstract hnp:LandUseRightsAbstract
302 Land use rights Concept (Text Block (HTML)) For Period hnp:LandUseRightsTextBlock
303 11200 - Disclosure - Power generation licenses Network

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304 Implied Table Table

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305 Power generation licenses [abstract] Abstract hnp:PowerGenerationLicensesAbstract
306 Power generation licenses Concept (Text Block (HTML)) For Period hnp:PowerGenerationLicensesTextBlock
307 11300 - Disclosure - Mining rights Network

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308 Implied Table Table

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309 Mining rights [abstract] Abstract hnp:MiningRightsAbstract
310 Mining rights Concept (Text Block (HTML)) For Period hnp:MiningRightsTextBlock
311 11400 - Disclosure - Derivative financial instruments Network

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312 Implied Table Table

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313 Derivative financial instruments [abstract] Abstract hnp:DerivativeFinancialInstrumentsAbstract
314 Derivative financial instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDerivativeFinancialInstrumentsExplanatory
315 11500 - Disclosure - Goodwill Network

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316 Implied Table Table

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317 Goodwill [abstract] Abstract hnp:GoodwillAbstract
318 Goodwill Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGoodwillExplanatory
319 11600 - Disclosure - Other non-current assets Network

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320 Implied Table Table

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321 Other non-current assets [abstract] Abstract hnp:OtherNonCurrentAssetsAbstract
322 Other non-current assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherNoncurrentAssetsExplanatory
323 11700 - Disclosure - Inventories Network

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324 Implied Table Table

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325 Inventories [abstract] Abstract hnp:InventoriesAbstract
326 Inventories Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInventoriesExplanatory
327 11800 - Disclosure - Other receivables and assets Network

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328 Implied Table Table

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329 Other receivables and assets [abstract] Abstract hnp:OtherReceivablesAndAssetsAbstract
330 Other receivables and assets Concept (Text Block (HTML)) For Period hnp:OtherReceivablesAndAssetsTextBlock
331 11900 - Disclosure - Accounts receivable Network

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332 Implied Table Table

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333 Accounts receivable [abstract] Abstract ifrs-full:TradeAndOtherCurrentReceivablesAbstract
334 Accounts receivable Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
335 12000 - Disclosure - Disposal group held for sale Network

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336 Implied Table Table

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337 Disposal group held for sale [abstract] Abstract hnp:DisposalGroupHeldForSaleAbstract
338 Disposal group held for sale Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory
339 12100 - Disclosure - Share capital Network

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340 Implied Table Table

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341 Share capital [abstract] Abstract hnp:ShareCapitalAbstract
342 Share capital Concept (Text Block (HTML)) For Period hnp:ShareCapitalTextBlock
343 12200 - Disclosure - Other equity instruments Network

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http://www.hpi.com.cn/role/OtherEquityInstruments
344 Implied Table Table

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345 Other equity instruments [abstract] Abstract hnp:OtherEquityInstrumentsAbstract
346 Other equity instruments Concept (Text Block (HTML)) For Period hnp:DisclosureOfOtherEquityInstrumentsTextBlock
347 12300 - Disclosure - Surplus reserves Network

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348 Implied Table Table

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349 Surplus reserves [abstract] Abstract hnp:SurplusReservesAbstract
350 Surplus reserves Concept (Text Block (HTML)) For Period hnp:SurplusReservesTextBlock
351 12400 - Disclosure - Dividends of ordinary shares and cumulative distribution of other equity instruments Network

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352 Implied Table Table

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353 Dividends of ordinary shares and cumulative distribution of other equity instruments [abstract] Abstract hnp:DividendsOfOrdinarySharesAndCumulativeDistributionOfOtherEquityInstrumentsAbstract
354 Dividends of ordinary shares and cumulative distribution of other equity instruments Concept (Text Block (HTML)) For Period hnp:DividendsOfOrdinarySharesAndCumulativeDistributionOfOtherEquityInstrumentsTextBlock
355 12500 - Disclosure - Long-term loans Network

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356 Implied Table Table

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357 Long-term loans [abstract] Abstract hnp:LongTermLoansAbstract
358 Long-term loans Concept (Text Block (HTML)) For Period hnp:LongTermLoansTextBlock
359 12600 - Disclosure - Long-term bonds Network

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360 Implied Table Table

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361 Long-term bonds [abstract] Abstract hnp:LongTermBondsAbstract
362 Long-term bonds Concept (Text Block (HTML)) For Period hnp:LongTermBondsTextBlock
363 12700 - Disclosure - Other non-current liabilities Network

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364 Implied Table Table

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365 Other non-current liabilities [abstract] Abstract hnp:OtherNonCurrentLiabilitiesAbstract
366 Other non-current liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherNoncurrentLiabilitiesExplanatory
367 12800 - Disclosure - Accounts payable and other liabilities Network

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368 Implied Table Table

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369 Accounts payable and other liabilities [abstract] Abstract hnp:AccountsPayableAndOtherLiabilitiesAbstract
370 Accounts payable and other liabilities Concept (Text Block (HTML)) For Period hnp:AccountsPayableAndOtherLiabilitiesTextBlock
371 12900 - Disclosure - Taxes payable Network

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372 Implied Table Table

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373 Taxes payable [abstract] Abstract hnp:TaxesPayableAbstract
374 Taxes payable Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTaxReceivablesAndPayablesExplanatory
375 13000 - Disclosure - Short-term bonds Network

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376 Implied Table Table

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377 Short-term bonds [abstract] Abstract hnp:ShortTermBondsAbstract
378 Short-term bonds Concept (Text Block (HTML)) For Period hnp:ShortTermBondsTextBlock
379 13100 - Disclosure - Short-term loans Network

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380 Implied Table Table

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381 Short-term loans [abstract] Abstract hnp:ShortTermLoansAbstract
382 Short-term loans Concept (Text Block (HTML)) For Period hnp:ShortTermLoansTextBlock
383 13200 - Disclosure - Deferred income tax assets and liabilities Network

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384 Implied Table Table

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385 Deferred income tax assets and liabilities [abstract] Abstract ifrs-full:DeferredTaxAssetsAndLiabilitiesAbstract
386 Deferred income tax assets and liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDeferredTaxesExplanatory
387 13300 - Disclosure - Additional financial information to consolidated statements of financial position Network

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388 Implied Table Table

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390 Additional financial information to the consolidated statements of financial position Concept (Text Block (HTML)) For Period hnp:AdditionalFinancialInformationToConsolidatedStatementsOfFinancialPositionTextBlock
391 13400 - Disclosure - Income tax expense Network

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392 Implied Table Table

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393 Income tax expense [abstract] Abstract hnp:IncomeTaxExpenseAbstract
394 Income tax expense Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIncomeTaxExplanatory
395 13500 - Disclosure - Earnings per share Network

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396 Implied Table Table

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397 Earnings per share [abstract] Abstract ifrs-full:EarningsPerShareAbstract
398 Earnings per share Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEarningsPerShareExplanatory
399 13600 - Disclosure - Notes to consolidated statement of cash flows Network

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400 Implied Table Table

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401 Consolidated Statements of Cash Flows [abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
402 Notes to consolidated statement of cash flows Concept (Text Block (HTML)) For Period hnp:NotesToConsolidatedStatementOfCashFlowsTextBlock
403 13700 - Disclosure - Related party balances and transactions Network

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404 Implied Table Table

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405 Related party balances and transactions [abstract] Abstract ifrs-full:RelatedPartyTransactionsAbstract
406 Related party balances and transactions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRelatedPartyExplanatory
407 13800 - Disclosure - Labor cost Network

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408 Implied Table Table

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409 Labor cost [abstract] Abstract hnp:LaborCostAbstract
410 Labor cost Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
411 13900 - Disclosure - Directors', supervisors' and senior management's emoluments Network

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412 Implied Table Table

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414 Directors', supervisors' and senior management's emoluments Concept (Text Block (HTML)) For Period hnp:DirectorsSupervisorsAndSeniorManagementsEmolumentsTextBlock
415 14000 - Disclosure - Commitments Network

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416 Implied Table Table

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417 Commitments [abstract] Abstract hnp:CommitmentsAbstract
418 Commitments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCommitmentsExplanatory
419 14100 - Disclosure - Business combinations Network

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421 Business combinations [abstract] Abstract ifrs-full:DisclosureOfBusinessCombinationsAbstract
422 Business combinations Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBusinessCombinationsExplanatory
423 14200 - Disclosure - Non-controlling interests Network

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424 Implied Table Table

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425 Non-controlling interests [abstract] Abstract hnp:NonControllingInterestsAbstract
426 Non-controlling interests Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNoncontrollingInterestsExplanatory
427 14300 - Disclosure - Subsequent events Network

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428 Implied Table Table

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429 Subsequent events [abstract] Abstract hnp:SubsequentEventsAbstract
430 Subsequent events Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
431 20200 - Disclosure - Principal accounting policies (Policies) Network

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432 Implied Table Table

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433 Principal accounting policies [abstract] Abstract hnp:PrincipalAccountingPoliciesAbstract
434 Basis of preparation Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory
435 Changes in accounting policies Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfVoluntaryChangeInAccountingPolicy
436 Consolidation Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBasisOfConsolidationExplanatory
437 Separate financial statements of the Company Concept (Text Block (HTML)) For Period hnp:DescriptionOfSeparateFinancialStatementsOfCompanyTextBlock
438 Segment reporting Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
439 Foreign currency translation Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
440 Property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
441 Investment property Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForInvestmentPropertyExplanatory
442 Power generation license Concept (Text Block (HTML)) For Period hnp:DescriptionOfAccountingPolicyForPowerGenerationLicenseTextBlock
443 Mining rights Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForMiningRightsExplanatory
444 Goodwill Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForGoodwillExplanatory
445 Impairment of non-financial assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory
446 Financial instruments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
447 Loans and receivables Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForLoansAndReceivablesExplanatory
448 Inventories Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
449 Related parties Concept (Text Block (HTML)) For Period hnp:DescriptionOfAccountingPolicyForRelatedPartiesTextBlock
450 Cash and cash equivalents Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
451 Borrowings Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForBorrowingsExplanatory
452 Borrowing costs Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForBorrowingCostsExplanatory
453 Share Capital Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
454 Other equity instruments Concept (Text Block (HTML)) For Period hnp:DescriptionOfAccountingPolicyForOtherEquityInstrumentsTextBlock
455 Payables Concept (Text Block (HTML)) For Period hnp:DescriptionOfAccountingPolicyForPayablesTextBlock
456 Taxation Concept (Text Block (HTML)) For Period hnp:DescriptionOfAccountingPolicyForTaxationTextBlock
457 Employee benefits Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
458 Government grants Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForGovernmentGrants
459 Revenue and other income Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
460 Contract cost Concept (Text Block (HTML)) For Period hnp:DescriptionOfAccountingPolicyForContractCostTextBlock
461 Leases Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
462 Purchase of electricity Concept (Text Block (HTML)) For Period hnp:DescriptionOfAccountingPolicyForPurchaseOfElectricityTextBlock
463 Non-current assets (or disposal group) held for sale Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory
464 Dividend distribution Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForDividendsExplanatory
465 Contingencies Concept (Text Block (HTML)) For Period hnp:DescriptionOfAccountingPolicyForContingenciesTextBlock
466 Standards and amendments to published standards that are not yet effective but relevant to the Company and its subsidiaries Concept (Text Block (HTML)) For Period hnp:DescriptionOfAccountingPolicyForStandardsAndAmendmentsToPublishedStandardsThatAreNotYetEffectiveButRelevantToCompanyAndItsSubsidiariesTextBlock
467 30200 - Schedule - Principal accounting policies (Tables) Network

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468 Implied Table Table

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469 Principal accounting policies [abstract] Abstract hnp:PrincipalAccountingPoliciesAbstract
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471 Reconciles carrying amounts of available-for-sale financial assets determined in accordance with IAS 39 to those determined in accordance with IFRS 9 Concept (Text Block (HTML)) For Period hnp:ScheduleOfReconcilesCarryingAmountsOfAvailableForSaleFinancialAssetsDeterminedInAccordanceWithIas39ToThoseDeterminedInAccordanceWithIfrs9TableTextBlock
472 Estimated impact of adoption of IFRS 15 on consolidated financial statements Concept (Text Block (HTML)) For Period hnp:ScheduleOfEstimatedImpactOfAdoptionOfIfrs15OnConsolidatedFinancialStatementsTableTextBlock
473 Estimated useful lives of property plant and equipment Concept (Text Block (HTML)) For Period hnp:ScheduleOfEstimatedUsefulLivesOfPropertyPlantAndEquipmentTableTextBlock
474 30300 - Schedule - Financial and capital risks management (Tables) Network

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476 Financial and capital risks management [abstract] Abstract hnp:FinancialAndCapitalRisksManagementAbstract
477 Loss allowances for accounts receivable under lifetime ECLs measurement Concept (Text Block (HTML)) For Period hnp:ScheduleOfAccountsReceivableCountsForCreditRiskAndLifetimeExpectedCreditLossModelsTableTextBlock
478 Loss allowances for other receivables under lifetime ECLs measurement Concept (Text Block (HTML)) For Period hnp:ScheduleOfOtherReceivablesCountsForCreditRiskAndLifetimeExpectedCreditLossModelsTableTextBlock
479 Assets and liabilities measured at fair value Concept (Text Block (HTML)) For Period hnp:ScheduleOfAssetsAndLiabilitiesMeasuredAtFairValueTableTextBlock
480 Movements of contingent consideration during the period in the balance of the Level 3 fair value measurements Concept (Text Block (HTML)) For Period hnp:ScheduleOfMovementsOfContingentConsiderationDuringPeriodInBalanceOfLevel3FairValueMeasurementsTableTextBlock
481 Movements of other equity instrument investments during the period in the balance of the Level 3 fair value measurements Concept (Text Block (HTML)) For Period hnp:ScheduleOfMovementsOfOtherEquityInstrumentInvestmentsDuringPeriodInBalanceOfLevel3FairValueMeasurementsTableTextBlock
482 30500 - Schedule - Revenue and segment information (Tables) Network

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483 Implied Table Table

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484 Revenue and segment information [abstract] Abstract ifrs-full:RevenueAbstract
485 Disclosure of disaggregation of revenue Concept (Text Block (HTML)) For Period hnp:ScheduleOfDisaggregationOfRevenueFromContractsWithCustomersTableTextBlock
486 Revenue information under PRC GAAP Concept (Text Block (HTML)) For Period hnp:ScheduleOfRevenueInformationUnderPrcGaapTableTextBlock
487 Assets and liabilities information under PRC GAAP Concept (Text Block (HTML)) For Period hnp:ScheduleOfAssetsAndLiabilitiesInformationUnderPrcGaapTableTextBlock
488 Reconciliation of external revenue to operating revenue Concept (Text Block (HTML)) For Period hnp:ScheduleOfReconciliationOfExternalRevenueToOperatingRevenueTableTextBlock
489 Reconciliation of segment result to profit before income tax expense Concept (Text Block (HTML)) For Period hnp:ScheduleOfReconciliationOfSegmentResultToProfitBeforeIncomeTaxExpenseTableTextBlock
490 Reportable segments' assets reconciled to total assets Concept (Text Block (HTML)) For Period hnp:ScheduleOfReportableSegmentsAssetsReconciledToAssetsTableTextBlock
491 Reportable segments' liabilities reconciled to total liabilities Concept (Text Block (HTML)) For Period hnp:ScheduleOfReportableSegmentsLiabilitiesReconciledToLiabilitiesTableTextBlock
492 Other material items Concept (Text Block (HTML)) For Period hnp:ScheduleOfOtherMaterialItemsTableTextBlock
493 Countries that external revenue generated from Concept (Text Block (HTML)) For Period hnp:ScheduleOfCountriesThatExternalRevenueGeneratedFromTableTextBlock
494 Countries that non-current assets (excluding financial assets and deferred income tax assets) located Concept (Text Block (HTML)) For Period hnp:ScheduleOfCountriesThatNonCurrentAssetsExcludingFinancialAssetsAndDeferredIncomeTaxAssetsLocatedTableTextBlock
495 Information on sales to major customers Concept (Text Block (HTML)) For Period hnp:ScheduleOfInformationOnSalesToMajorCustomersTableTextBlock
496 30600 - Schedule - Profit before income tax expense (Tables) Network

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497 Implied Table Table

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498 Profit before income tax expense [abstract] Abstract hnp:ProfitBeforeIncomeTaxExpenseAbstract
499 Profit before income tax expense Concept (Text Block (HTML)) For Period hnp:ScheduleOfProfitBeforeIncomeTaxExpenseTableTextBlock
500 30700 - Schedule - Property, plant and equipment (Tables) Network

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501 Implied Table Table

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502 Property, plant and equipment [abstract] Abstract ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
503 Detailed information about property, plant and equipment Concept (Text Block (HTML)) For Period hnp:ScheduleOfDetailedInformationAboutPropertyPlantAndEquipmentTableTextBlock
504 30800 - Schedule - Investments in associates and joint ventures (Tables) Network

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505 Implied Table Table

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507 Summary of investments in associates and joint ventures Concept (Text Block (HTML)) For Period hnp:ScheduleOfInvestmentsInAssociatesAndJointVenturesTableTextBlock
508 Basic information of material associates and joint ventures Concept (Text Block (HTML)) For Period hnp:ScheduleOfBasicInformationOfMaterialAssociatesAndJointVenturesTableTextBlock
509 Summarized financial information of the material associates Concept (Text Block (HTML)) For Period hnp:ScheduleOfFinancialInformationOfMaterialAssociatesTableTextBlock
510 Summarized financial information of material joint ventures Concept (Text Block (HTML)) For Period hnp:ScheduleOfFinancialInformationOfMaterialJointVenturesTableTextBlock
511 Aggregated information of individually immaterial associates and joint ventures Concept (Text Block (HTML)) For Period hnp:ScheduleOfAggregatedInformationOfIndividuallyImmaterialAssociatesAndJointVenturesTableTextBlock
512 30900 - Schedule - Investments in subsidiaries (Tables) Network

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514 Investments in subsidiaries [abstract] Abstract hnp:InvestmentsInSubsidiariesAbstract
515 Subsidiaries acquired through establishment or investment Concept (Text Block (HTML)) For Period hnp:ScheduleOfSubsidiariesAcquiredThroughEstablishmentOrInvestmentTableTextBlock
516 Subsidiaries acquired from business combinations under common control Concept (Text Block (HTML)) For Period hnp:ScheduleOfSubsidiariesAcquiredFromBusinessCombinationsUnderCommonControlTableTextBlock
517 Subsidiaries acquired from business combinations not under common control Concept (Text Block (HTML)) For Period hnp:ScheduleOfSubsidiariesAcquiredFromBusinessCombinationsNotUnderCommonControlTableTextBlock
518 31000 - Schedule - Other equity instrument investments (Tables) Network

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http://www.hpi.com.cn/role/OtherEquityInstrumentInvestmentsTables
519 Implied Table Table

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520 Other equity instrument investments [abstract] Abstract ifrs-full:DisclosureOfFairValueOfInvestmentsInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeAbstract
521 Other equity instrument investments Concept (Text Block (HTML)) For Period hnp:ScheduleOfOtherEquityInstrumentInvestmentsTableTextBlock
522 31100 - Schedule - Land use rights (Tables) Network

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http://www.hpi.com.cn/role/LandUseRightsTables
523 Implied Table Table

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524 Land use rights [abstract] Abstract hnp:LandUseRightsAbstract
525 Detailed information about land use rights Concept (Text Block (HTML)) For Period hnp:ScheduleOfDetailedInformationAboutLandUseRightsTableTextBlock
526 31200 - Schedule - Power generation licenses (Tables) Network

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http://www.hpi.com.cn/role/PowerGenerationLicensesTables
527 Implied Table Table

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528 Power generation licenses [abstract] Abstract hnp:PowerGenerationLicensesAbstract
529 Detailed information about power generation license Concept (Text Block (HTML)) For Period hnp:ScheduleOfDetailedInformationAboutPowerGenerationLicenseTableTextBlock
530 31300 - Schedule - Mining rights (Tables) Network

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*

http://www.hpi.com.cn/role/MiningRightsTables
531 Implied Table Table

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implied:Table
532 Mining rights [abstract] Abstract hnp:MiningRightsAbstract
533 Detailed information about mining rights Concept (Text Block (HTML)) For Period hnp:ScheduleOfDetailedInformationAboutMiningRightsTableTextBlock
534 31400 - Schedule - Derivative financial instruments (Tables) Network

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http://www.hpi.com.cn/role/DerivativeFinancialInstrumentsTables
535 Implied Table Table

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implied:Table
536 Derivative financial instruments [abstract] Abstract hnp:DerivativeFinancialInstrumentsAbstract
537 Details of derivative financial instruments Concept (Text Block (HTML)) For Period hnp:ScheduleOfDetailsOfDerivativeFinancialInstrumentsTableTextBlock
538 Analysis of contractual cash inflows/ (outflows) of major derivative financial instruments Concept (Text Block (HTML)) For Period hnp:ScheduleOfAnalysisOfContractualCashInflowsOutflowsOfMajorDerivativeFinancialInstrumentsTableTextBlock
539 31500 - Schedule - Goodwill (Tables) Network

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http://www.hpi.com.cn/role/GoodwillTables
540 Implied Table Table

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implied:Table
541 Goodwill [abstract] Abstract hnp:GoodwillAbstract
542 Movements of goodwill Concept (Text Block (HTML)) For Period hnp:ScheduleOfMovementsOfGoodwillTableTextBlock
543 Carrying amounts of major goodwill allocated to individual CGUs Concept (Text Block (HTML)) For Period hnp:ScheduleOfCarryingAmountsOfMajorGoodwillAllocatedToIndividualCgusTableTextBlock
544 Discount rates used for value-in-use calculations Concept (Text Block (HTML)) For Period hnp:ScheduleOfDiscountRatesUsedForValueInUseCalculationsTableTextBlock
545 31600 - Schedule - Other non-current assets (Tables) Network

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*

http://www.hpi.com.cn/role/OtherNonCurrentAssetsTables
546 Implied Table Table

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547 Other non-current assets [abstract] Abstract hnp:OtherNonCurrentAssetsAbstract
548 Details of other non-current assets Concept (Text Block (HTML)) For Period hnp:ScheduleOfDetailsOfOtherNonCurrentAssetsTableTextBlock
549 31700 - Schedule - Inventories (Tables) Network

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http://www.hpi.com.cn/role/InventoriesTables
550 Implied Table Table

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implied:Table
551 Inventories [abstract] Abstract hnp:InventoriesAbstract
552 Details of inventories Concept (Text Block (HTML)) For Period hnp:ScheduleOfDetailsOfInventoriesTableTextBlock
553 Movements of provision for inventory obsolescence during the years Concept (Text Block (HTML)) For Period hnp:ScheduleOfMovementsOfProvisionForInventoryObsolescenceDuringYearsTableTextBlock
554 31800 - Schedule - Other receivables and assets (Tables) Network

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http://www.hpi.com.cn/role/OtherReceivablesAndAssetsTables
555 Implied Table Table

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implied:Table
556 Other receivables and assets [abstract] Abstract hnp:OtherReceivablesAndAssetsAbstract
557 Other receivables and assets Concept (Text Block (HTML)) For Period hnp:ScheduleOfOtherReceivablesAndAssetsTableTextBlock
558 Gross amounts of other receivables denominated in currencies Concept (Text Block (HTML)) For Period hnp:ScheduleOfGrossAmountsOfOtherReceivablesDenominatedInCurrenciesTableTextBlock
559 Movements of other receivables and assets loss allowance Concept (Text Block (HTML)) For Period hnp:ScheduleOfMovementsOfOtherReceivablesAndAssetsProvisionForDoubtfulAccountsTableTextBlock
560 31900 - Schedule - Accounts receivable (Tables) Network

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*

http://www.hpi.com.cn/role/AccountsReceivableTables
561 Implied Table Table

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562 Accounts receivable [abstract] Abstract ifrs-full:TradeAndOtherCurrentReceivablesAbstract
563 Accounts receivable Concept (Text Block (HTML)) For Period hnp:ScheduleOfAccountsReceivableTableTextBlock
564 Gross amounts of account receivables denominated in currencies Concept (Text Block (HTML)) For Period hnp:ScheduleOfGrossAmountsOfAccountReceivablesDenominatedInCurrenciesTableTextBlock
565 Movements of loss allowance Concept (Text Block (HTML)) For Period hnp:ScheduleOfMovementsOfProvisionForDoubtfulAccountsTableTextBlock
566 Ageing analysis of accounts receivable Concept (Text Block (HTML)) For Period hnp:ScheduleOfAgeingAnalysisOfAccountsReceivableTableTextBlock
567 32000 - Schedule - Disposal group held for sale (Tables) Network

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*

http://www.hpi.com.cn/role/DisposalGroupHeldForSaleTables
568 Implied Table Table

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implied:Table
569 Disposal group held for sale [abstract] Abstract hnp:DisposalGroupHeldForSaleAbstract
570 Assets and liabilities included in the disposal group held for sale Concept (Text Block (HTML)) For Period hnp:ScheduleOfAssetsAndLiabilitiesIncludedInDisposalGroupHeldForSaleTableTextBlock
571 32100 - Schedule - Share capital (Tables) Network

*

*

http://www.hpi.com.cn/role/ShareCapitalTables
572 Implied Table Table

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573 Share capital [abstract] Abstract hnp:ShareCapitalAbstract
574 Share capital Concept (Text Block (HTML)) For Period hnp:ScheduleOfShareCapitalTableTextBlock
575 32200 - Schedule - Other equity instruments (Tables) Network

*

*

http://www.hpi.com.cn/role/OtherEquityInstrumentsTables
576 Implied Table Table

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implied:Table
577 Other equity instruments [abstract] Abstract hnp:OtherEquityInstrumentsAbstract
578 Details of other equity instruments Concept (Text Block (HTML)) For Period hnp:ScheduleOfDetailsOfOtherEquityInstrumentsTableTextBlock
579 Changes of other equity instruments Concept (Text Block (HTML)) For Period hnp:ScheduleOfChangesOfOtherEquityInstrumentsTableTextBlock
580 32300 - Schedule - Surplus reserves (Tables) Network

*

*

http://www.hpi.com.cn/role/SurplusReservesTables
581 Implied Table Table

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implied:Table
582 Surplus reserves [abstract] Abstract hnp:SurplusReservesAbstract
583 Surplus reserves Concept (Text Block (HTML)) For Period hnp:ScheduleOfSurplusReservesTableTextBlock
584 32500 - Schedule - Long-term loans (Tables) Network

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*

http://www.hpi.com.cn/role/LongTermLoansTables
585 Implied Table Table

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implied:Table
586 Long-term loans [abstract] Abstract hnp:LongTermLoansAbstract
587 Long-term loans Concept (Text Block (HTML)) For Period hnp:ScheduleOfLongTermLoansTableTextBlock
588 Loans from Huaneng Group and its subsidiaries (a) Concept (Text Block (HTML)) For Period hnp:ScheduleOfLoansFromUltimateParentCompanyOfCompanyTableTextBlock
589 Bank loans and other loans (b) Concept (Text Block (HTML)) For Period hnp:ScheduleOfBankLoansAndOtherLoansTableTextBlock
590 Maturity of long-term loans Concept (Text Block (HTML)) For Period hnp:ScheduleOfMaturityOfLongTermLoansTableTextBlock
591 Interest payment schedule of long-term loans in future years Concept (Text Block (HTML)) For Period hnp:ScheduleOfInterestPaymentScheduleOfLongTermLoansInFutureYearsTableTextBlock
592 32700 - Schedule - Other non-current liabilities (Tables) Network

*

*

http://www.hpi.com.cn/role/OtherNonCurrentLiabilitiesTables
593 Implied Table Table

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implied:Table
594 Other non-current liabilities [abstract] Abstract hnp:OtherNonCurrentLiabilitiesAbstract
595 Other non-current liabilities Concept (Text Block (HTML)) For Period hnp:ScheduleOfOtherNonCurrentLiabilitiesTableTextBlock
596 Obligation under finance leases Concept (Text Block (HTML)) For Period hnp:ScheduleOfObligationUnderFinanceLeasesTableTextBlock
597 32800 - Schedule - Accounts payable and other liabilities (Tables) Network

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http://www.hpi.com.cn/role/AccountsPayableAndOtherLiabilitiesTables
598 Implied Table Table

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implied:Table
599 Accounts payable and other liabilities [abstract] Abstract hnp:AccountsPayableAndOtherLiabilitiesAbstract
600 Accounts payable and other liabilities Concept (Text Block (HTML)) For Period hnp:ScheduleOfAccountsPayableAndOtherLiabilitiesTableTextBlock
601 Carrying amounts of financial liabilities denominated in currencies Concept (Text Block (HTML)) For Period hnp:ScheduleOfCarryingAmountsOfFinancialLiabilitiesDenominatedInCurrenciesTableTextBlock
602 Ageing analysis of accounts and notes payable Concept (Text Block (HTML)) For Period hnp:ScheduleOfAgeingAnalysisOfAccountsAndNotesPayableTableTextBlock
603 32900 - Schedule - Taxes payable (Tables) Network

*

*

http://www.hpi.com.cn/role/TaxesPayableTables
604 Implied Table Table

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implied:Table
605 Taxes payable [abstract] Abstract hnp:TaxesPayableAbstract
606 Taxes payable Concept (Text Block (HTML)) For Period hnp:ScheduleOfTaxesPayableTableTextBlock
607 33100 - Schedule - Short-term loans (Tables) Network

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*

http://www.hpi.com.cn/role/ShortTermLoansTables
608 Implied Table Table

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implied:Table
609 Short-term loans [abstract] Abstract hnp:ShortTermLoansAbstract
610 Short-term loans Concept (Text Block (HTML)) For Period hnp:ScheduleOfShortTermLoansTableTextBlock
611 33200 - Schedule - Deferred income tax assets and liabilities (Tables) Network

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*

http://www.hpi.com.cn/role/DeferredIncomeTaxAssetsAndLiabilitiesTables
612 Implied Table Table

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implied:Table
613 Deferred income tax assets and liabilities [abstract] Abstract ifrs-full:DeferredTaxAssetsAndLiabilitiesAbstract
614 Deferred income tax assets and liabilities Concept (Text Block (HTML)) For Period hnp:ScheduleOfDeferredIncomeTaxAssetsAndLiabilitiesTableTextBlock
615 Gross movement on deferred income tax accounts Concept (Text Block (HTML)) For Period hnp:ScheduleOfGrossMovementOnDeferredIncomeTaxAccountsTableTextBlock
616 Movements in deferred income tax assets without taking into consideration the offsetting Concept (Text Block (HTML)) For Period hnp:ScheduleOfMovementsInDeferredIncomeTaxAssetsWithoutTakingIntoConsiderationOffsettingTableTextBlock
617 Movements in deferred income tax liabilities without taking into consideration the offsetting Concept (Text Block (HTML)) For Period hnp:ScheduleOfMovementsInDeferredIncomeTaxLiabilitiesWithoutTakingIntoConsiderationOffsettingTableTextBlock
618 Unrecognised deferred income tax assets in respect of certain deductible temporary differences and accumulated tax losses Concept (Text Block (HTML)) For Period hnp:ScheduleOfUnrecognisedDeferredIncomeTaxAssetsInRespectOfCertainDeductibleTemporaryDifferencesAndAccumulatedTaxLossesTableTextBlock
619 Summary of expiry dates of the tax losses for which no deferred income tax assets were recognised Concept (Text Block (HTML)) For Period hnp:ScheduleOfExpiryDatesOfTaxLossesForWhichNoDeferredIncomeTaxAssetsWereRecognisedTableTextBlock
620 33400 - Schedule - Income tax expense (Tables) Network

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http://www.hpi.com.cn/role/IncomeTaxExpenseTables
621 Implied Table Table

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622 Income tax expense [abstract] Abstract hnp:IncomeTaxExpenseAbstract
623 Income tax expense Concept (Text Block (HTML)) For Period hnp:ScheduleOfIncomeTaxExpenseTableTextBlock
624 Reconciliation of effective income tax rate from notional income tax rate Concept (Text Block (HTML)) For Period hnp:ScheduleOfReconciliationOfEffectiveIncomeTaxRateFromNotionalIncomeTaxRateTableTextBlock
625 33500 - Schedule - Earnings per share (Tables) Network

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*

http://www.hpi.com.cn/role/EarningsPerShareTables
626 Implied Table Table

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627 Earnings per share [abstract] Abstract ifrs-full:EarningsPerShareAbstract
628 Earnings per share Concept (Text Block (HTML)) For Period hnp:ScheduleOfEarningsPerShareTableTextBlock
629 Weighted average number of ordinary shares Concept (Text Block (HTML)) For Period hnp:ScheduleOfWeightedAverageNumberOfOrdinarySharesTableTextBlock
630 33600 - Schedule - Notes to consolidated statement of cash flows (Tables) Network

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http://www.hpi.com.cn/role/NotesToConsolidatedStatementOfCashFlowsTables
631 Implied Table Table

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632 Consolidated Statements of Cash Flows [abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
633 Bank balances and cash Concept (Text Block (HTML)) For Period hnp:ScheduleOfBankBalancesAndCashTableTextBlock
634 Bank balances and cash denominated in currencies Concept (Text Block (HTML)) For Period hnp:ScheduleOfBankBalancesAndCashDenominatedInCurrenciesTableTextBlock
635 Changes in the group's liabilities from financing activities Concept (Text Block (HTML)) For Period hnp:ScheduleOfChangesInLiabilitiesFromFinancingActivitiesTableTextBlock
636 33700 - Schedule - Related party balances and transactions (Tables) Network

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http://www.hpi.com.cn/role/RelatedPartyBalancesAndTransactionsTables
637 Implied Table Table

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638 Related party balances and transactions [abstract] Abstract ifrs-full:RelatedPartyTransactionsAbstract
639 List of related parties of the Company and its subsidiaries that had transactions with the Company and its subsidiaries Concept (Text Block (HTML)) For Period hnp:ScheduleOfListOfRelatedPartiesOfCompanyAndItsSubsidiariesThatHadTransactionsWithCompanyAndItsSubsidiariesTableTextBlock
640 Cash deposits in related parties Concept (Text Block (HTML)) For Period hnp:ScheduleOfCashDepositsInRelatedPartiesTableTextBlock
641 Balances of accounts receivable, other receivables and assets and other non-current assets due from related parties Concept (Text Block (HTML)) For Period hnp:ScheduleOfBalancesOfAccountsReceivableOtherReceivablesAndAssetsAndOtherNonCurrentAssetsDueFromRelatedPartiesTableTextBlock
642 Balances of accounts payable and other liabilities and other non-current liabilities due to related parties Concept (Text Block (HTML)) For Period hnp:ScheduleOfBalancesOfAccountsPayableAndOtherLiabilitiesAndOtherNonCurrentLiabilitiesDueToRelatedPartiesTableTextBlock
643 Related party transactions, procurement of goods and receiving services Concept (Text Block (HTML)) For Period hnp:ScheduleOfRelatedPartyTransactionsProcurementOfGoodsAndReceivingServicesTableTextBlock
644 Related party transactions, sales of goods and providing services Concept (Text Block (HTML)) For Period hnp:ScheduleOfRelatedPartyTransactionsSalesOfGoodsAndProvidingServicesTableTextBlock
645 Related party transactions, other related party transactions Concept (Text Block (HTML)) For Period hnp:ScheduleOfRelatedPartyTransactionsOtherRelatedPartyTransactionsTableTextBlock
646 Guarantees Concept (Text Block (HTML)) For Period hnp:ScheduleOfGuaranteesTableTextBlock
647 Pre-tax benefits and social insurance of key management personnel Concept (Text Block (HTML)) For Period hnp:ScheduleOfPreTaxBenefitsAndSocialInsuranceOfKeyManagementPersonnelTableTextBlock
648 Related party capital commitments Concept (Text Block (HTML)) For Period hnp:ScheduleOfRelatedPartyCapitalCommitmentsTableTextBlock
649 Related party fuel purchase and transportation commitments Concept (Text Block (HTML)) For Period hnp:ScheduleOfRelatedPartyFuelPurchaseAndTransportationCommitmentsTableTextBlock
650 Related party operating lease commitments Concept (Text Block (HTML)) For Period hnp:ScheduleOfRelatedPartyOperatingLeaseCommitmentsTableTextBlock
651 33900 - Schedule - Directors', supervisors' and senior management's emoluments (Tables) Network

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http://www.hpi.com.cn/role/DirectorsSupervisorsAndSeniorManagementsEmolumentsTables
652 Implied Table Table

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653 Directors', supervisors' and senior management's emoluments [abstract] Abstract hnp:DirectorsSupervisorsAndSeniorManagementsEmolumentsAbstract
654 Pre-tax benefits and social insurance of directors and supervisors Concept (Text Block (HTML)) For Period hnp:ScheduleOfPreTaxBenefitsAndSocialInsuranceOfDirectorsAndSupervisorsTableTextBlock
655 Five highest paid individuals Concept (Text Block (HTML)) For Period hnp:ScheduleOfFiveHighestPaidIndividualsTableTextBlock
656 34000 - Schedule - Commitments (Tables) Network

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http://www.hpi.com.cn/role/CommitmentsTables
657 Implied Table Table

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658 Commitments [abstract] Abstract hnp:CommitmentsAbstract
659 Capital commitments Concept (Text Block (HTML)) For Period hnp:ScheduleOfCapitalCommitmentsTableTextBlock
660 Total future minimum lease payments under non-cancelable operating leases Concept (Text Block (HTML)) For Period hnp:ScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesTableTextBlock
661 Fuel purchase commitments Concept (Text Block (HTML)) For Period hnp:ScheduleOfFuelPurchaseCommitmentsTableTextBlock
662 34100 - Schedule - Business combinations (Tables) Network

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http://www.hpi.com.cn/role/BusinessCombinationsTables
663 Implied Table Table

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664 Business combinations [abstract] Abstract ifrs-full:DisclosureOfBusinessCombinationsAbstract
665 Consideration for acquisition from Taishan Power Concept (Text Block (HTML)) For Period hnp:ScheduleOfConsiderationForAcquisitionTableTextBlock
666 Assets and liabilities arising from the acquisitions from Taishan Power Concept (Text Block (HTML)) For Period hnp:ScheduleOfAssetsAndLiabilitiesArisingFromAcquisitionsTableTextBlock
667 Acquisition information of transfers from joint ventures to subsidiaries Concept (Text Block (HTML)) For Period hnp:ScheduleOfAcquisitionInformationOfTransfersFromJointVenturesToSubsidiariesTableTextBlock
668 Identifiable assets and liabilities of acquirees as at the acquisition date due to transfers from joint ventures to subsidiaries Concept (Text Block (HTML)) For Period hnp:ScheduleOfIdentifiableAssetsAndLiabilitiesOfAcquireesAsAtAcquisitionDateDueToTransfersFromJointVenturesToSubsidiariesTableTextBlock
669 34200 - Schedule - Non-controlling interests (Tables) Network

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670 Implied Table Table

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671 Non-controlling interests [abstract] Abstract hnp:NonControllingInterestsAbstract
672 Information relating to each of the Company and subsidiaries that have material non-controlling interests ("NCI") Concept (Text Block (HTML)) For Period hnp:ScheduleOfInformationRelatingToEachOfCompanyAndSubsidiariesThatHaveMaterialNonControllingInterestsTableTextBlock
673 40200 - Disclosure - Principal accounting policies (Basis of preparation) (Detail) Network

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http://www.hpi.com.cn/role/PrincipalAccountingPoliciesBasisOfPreparationDetail
674 Implied Table Table

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675 Principal accounting policies [abstract] Abstract hnp:PrincipalAccountingPoliciesAbstract
676 Net current liabilities Concept (Monetary) As Of Debit ifrs-full:CurrentAssetsLiabilities
677 Expected operating cash flows and the undrawn available banking facilities Concept (Monetary) For Period Debit hnp:ExpectedOperatingCashFlowsAndUndrawnAvailableBankingFacilities
678 40201 - Disclosure - Principal accounting policies (Impact of transition to IFRS 9 on reserves) (Detail) Network

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http://www.hpi.com.cn/role/PrincipalAccountingPoliciesImpactOfTransitionToIfrs9OnReservesDetail
679 Impact of transition to IFRS 9 on reserves [table] Table

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hnp:ImpactOfTransitionToIfrs9OnReservesTable
680 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
681 Total equity [member] Member ifrs-full:EquityMember
682 Other reserve in other comprehensive income [member] Member hnp:OtherReserveInOtherComprehensiveIncomeMember
683 Fair value Reserve (non-recycling) [member] Member hnp:FairValueReserveNonRecyclingMember
684 Impact of transition to IFRS 9 on reserves [line items] LineItems hnp:ImpactOfTransitionToIfrs9OnReservesLineItems
685 Impact of transition to IFRS 9 on equity Concept (Monetary) As Of Credit hnp:EquityAdjustmentsIncreaseDecreaseThroughChangesInAccountingPolicies
686 40202 - Disclosure - Principal accounting policies (Reconciles carrying amounts of available-for-sale financial assets determined in accordance with IAS 39 to those determined in accordance with IFRS 9) (Detail) Network

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http://www.hpi.com.cn/role/PrincipalAccountingPoliciesReconcilesCarryingAmountsOfAvailableForSaleFinancialAssetsDeterminedInAccordanceWithIas39ToThoseDeterminedInAccordanceWithIfrs9Detail
687 Disclosure of financial assets at date of initial application of IFRS 9 [table] Table

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ifrs-full:DisclosureOfFinancialAssetsAtDateOfInitialApplicationOfIFRS9Table
688 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
689 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
690 Other equity instrument investments [member] Member ifrs-full:InvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember
691 Financial assets classified as available-for-sale under IAS39 [member] Member ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
692 Disclosure of financial assets at date of initial application of IFRS 9 [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsAtDateOfInitialApplicationOfIFRS9LineItems
693 IAS 39 Carrying amount at 31 December 2017 Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsCarryingAmountImmediatelyBeforeInitialApplicationOfIFRS9
694 Reclassification Concept (Monetary) As Of Debit ifrs-full:IncreaseDecreaseInFinancialAssetsOnBasisOfMeasurementCategoryFirstApplicationOfIFRS9
695 Remeasurement Concept (Monetary) As Of Debit ifrs-full:IncreaseDecreaseInFinancialAssetsArisingFromChangeInMeasurementAttributeFirstApplicationOfIFRS9
696 IFRS 9 Carrying amount at 1 January 2018 Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsCarryingAmountImmediatelyAfterInitialApplicationOfIFRS9
697 40203 - Disclosure - Principal accounting policies (Presentation of contract assets and liabilities) (Detail) Network

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http://www.hpi.com.cn/role/PrincipalAccountingPoliciesPresentationOfContractAssetsAndLiabilitiesDetail
698 Implied Table Table

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699 Principal accounting policies [abstract] Abstract hnp:PrincipalAccountingPoliciesAbstract
700 Contract liabilities represent accounts payable and other liabilities Concept (Monetary) As Of Credit hnp:AccountsPayableAndOtherLiabilitiesAmountsReceivedInAdvanceThatWasIncludedInContractLiabilityBalanceAtBeginningOfPeriod
701 Other non-current contract liabilities represent other deferred income Concept (Monetary) As Of Credit hnp:OtherNonCurrentLiabilitiesOtherDeferredIncomeThatWasIncludedInNonCurrentContractLiabilitiesBalanceAtBeginningOfPeriod
702 40204 - Disclosure - Principal accounting policies (Estimated impact of adoption of IFRS 15 on consolidated financial statements) (Detail) Network

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http://www.hpi.com.cn/role/PrincipalAccountingPoliciesEstimatedImpactOfAdoptionOfIfrs15OnConsolidatedFinancialStatementsDetail
703 Estimated impact of adoption of IFRS 15 on consolidated financial statements [table] Table

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hnp:EstimatedImpactOfAdoptionOfIfrs15OnConsolidatedFinancialStatementsTable
704 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
705 Amounts reported in accordance with IFRS 15 [member] Member ifrs-full:RestatedMember
706 Hypothetical amounts under IASs 18 and 11 [member] Member ifrs-full:PreviouslyStatedMember
707 Estimated impact of adoption of IFRS 15 on 2018 [member] Member ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
708 Estimated impact of adoption of IFRS 15 on consolidated financial statements [line items] LineItems hnp:EstimatedImpactOfAdoptionOfIfrs15OnConsolidatedFinancialStatementsLineItems
709 Accounts receivable Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
710 Contract assets Concept (Monetary) As Of Debit ifrs-full:CurrentContractAssets
711 Total current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
712 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
713 Accounts payable and other liabilities Concept (Monetary) As Of Credit hnp:AccountsPayableAndOtherLiabilities
714 Contract liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentContractLiabilities
715 Total current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
716 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
717 40205 - Disclosure - Principal accounting policies (Property, plant and equipment) (Detail) Network

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http://www.hpi.com.cn/role/PrincipalAccountingPoliciesPropertyPlantAndEquipmentDetail
718 Disclosure of detailed information about property, plant and equipment [table] Table

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ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
719 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
720 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
721 Dam [member] Member hnp:DamMember
722 Port facilities [member] Member hnp:PortFacilitiesMember
723 Buildings [member] Member ifrs-full:BuildingsMember
724 Electric utility plant in service [member] Member hnp:ElectricUtilityPlantInServiceMember
725 Transportation facilities [member] Member ifrs-full:VehiclesMember
726 Others [member] Member ifrs-full:OtherPropertyPlantAndEquipmentMember
727 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
728 Estimated useful lives of property plant and equipment Concept (Text/String) For Period ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
729 40206 - Disclosure - Principal accounting policies (Taxation) (Detail) Network

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http://www.hpi.com.cn/role/PrincipalAccountingPoliciesTaxationDetail
730 Taxation [table] Table

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hnp:TaxationTable
731 Types of business [axis] Axis hnp:TypesOfBusinessAxis
732 Types of business [member] Member hnp:TypesOfBusinessMember
733 Sales of power [member] Member hnp:SalesOfPowerMember
734 Sales of heat [member] Member hnp:SalesOfHeatMember
735 Sales of goods [member] Member hnp:SalesOfGoodsMember
736 Lease of tangible movable properties [member] Member hnp:LeaseOfTangibleMovablePropertiesMember
737 Transportation industry [member] Member hnp:TransportationIndustryMember
738 Other modern services industry [member] Member hnp:OtherModernServicesIndustryMember
739 Construction services [member] Member hnp:ConstructionServicesMember
740 Lease of immovables [member] Member hnp:LeaseOfImmovablesMember
741 Sale of immovables [member] Member hnp:SaleOfImmovablesMember
742 Transfer of land use rights [member] Member hnp:TransferOfLandUseRightsMember
743 Financial services [member] Member hnp:FinancialServicesMember
744 Living services [member] Member hnp:LivingServicesMember
745 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
746 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
747 PRC [member] Member country:CN
748 Singapore [member] Member country:SG
749 Pakistan [member] Member country:PK
750 Taxation [line items] LineItems hnp:TaxationLineItems
751 Tax rate of VAT Concept (Percent) For Period hnp:ValueAddedTaxRate
752 Tax rate of goods and service tax Concept (Percent) For Period hnp:GoodsAndServiceTaxRate
753 40207 - Disclosure - Principal accounting policies (Standards and amendments to published standards that are not yet effective but relevant to Company and its subsidiaries) (Detail) Network

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http://www.hpi.com.cn/role/PrincipalAccountingPoliciesStandardsAndAmendmentsToPublishedStandardsThatAreNotYetEffectiveButRelevantToCompanyAndItsSubsidiariesDetail
754 Implied Table Table

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755 Principal accounting policies [abstract] Abstract hnp:PrincipalAccountingPoliciesAbstract
756 Future minimum lease payments under non-cancellable operating leases Concept (Monetary) As Of Credit ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
757 40300 - Disclosure - Financial and capital risks management (Foreign exchange risk) (Detail) Network

*

*

http://www.hpi.com.cn/role/FinancialAndCapitalRisksManagementForeignExchangeRiskDetail
758 Financial and capital risks management [table] Table

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hnp:FinancialAndCapitalRisksManagementTable
759 Changes in rates [axis] Axis hnp:ChangesInRatesAxis
760 Changes in rates [member] Member hnp:ChangesInRatesMember
761 Presented currency weakened by 5% against foreign currency [member] Member hnp:PresentedCurrencyWeakenedByFivePercentAgainstForeignCurrencyMember
762 Presented currency strengthened by 5% against foreign currency [member] Member hnp:PresentedCurrencyStrengthenedByFivePercentAgainstForeignCurrencyMember
763 Presented currency weakened by 3% against foreign currency [member] Member hnp:PresentedCurrencyWeakenedByThreePercentAgainstForeignCurrencyMember
764 Presented currency strengthened by 3% against foreign currency [member] Member hnp:PresentedCurrencyStrengthenedByThreePercentAgainstForeignCurrencyMember
765 Presented currency weakened by 10% against foreign currency [member] Member hnp:PresentedCurrencyWeakenedByTenPercentAgainstForeignCurrencyMember
766 Presented currency strengthened by 10% against foreign currency [member] Member hnp:PresentedCurrencyStrengthenedByTenPercentAgainstForeignCurrencyMember
767 Foreign exchange risk, relationship between presented currency and foreign currency [axis] Axis hnp:ForeignExchangeRiskRelationshipBetweenPresentedCurrencyAndForeignCurrencyAxis
768 Foreign exchange risk, relationship between presented currency and foreign currency [member] Member hnp:ForeignExchangeRiskRelationshipBetweenPresentedCurrencyAndForeignCurrencyMember
769 Presented currency RMB to foreign currency USD [member] Member hnp:PresentedCurrencyRmbToForeignCurrencyUsdMember
770 Presented currency RMB to foreign currency EUR [member] Member hnp:PresentedCurrencyRmbToForeignCurrencyEurMember
771 Presented currency SGD to foreign currency USD [member] Member hnp:PresentedCurrencySgdToForeignCurrencyUsdMember
772 Presented currency PKR to foreign currency USD [member] Member hnp:PresentedCurrencyPkrToForeignCurrencyUsdMember
773 Financial and capital risks management [line items] LineItems hnp:FinancialAndCapitalRisksManagementLineItems
774 Adjusted amount of exchange gain/loss to be further recognised Concept (Monetary) For Period Credit hnp:ChangesInExchangeRateImpactOnProfitAndLoss
775 40301 - Disclosure - Financial and capital risks management (Cash flow interest rate risk) (Detail) Network

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*

http://www.hpi.com.cn/role/FinancialAndCapitalRisksManagementCashFlowInterestRateRiskDetail
776 Financial and capital risks management [table] Table

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*

hnp:FinancialAndCapitalRisksManagementTable
777 Changes in rates [axis] Axis hnp:ChangesInRatesAxis
778 Changes in rates [member] Member hnp:ChangesInRatesMember
779 50 basis points higher of interest rates on borrowings [member] Member hnp:FiftyBasisPointsHigherOfInterestRatesOnBorrowingsMember
780 50 basis points lower of interest rates on borrowings [member] Member hnp:FiftyBasisPointsLowerOfInterestRatesOnBorrowingsMember
781 100 basis points higher of interest rates on borrowings [member] Member hnp:OneHundredBasisPointsHigherOfInterestRatesOnBorrowingsMember
782 100 basis points lower of interest rates on borrowings [member] Member hnp:OneHundredBasisPointsLowerOfInterestRatesOnBorrowingsMember
783 Currencies of denominated borrowings [axis] Axis hnp:CurrenciesOfDenominatedBorrowingsAxis
784 All Currencies [Domain] Member currency:AllCurrenciesDomain
785 RMB [member] Member currency:CNY
786 S$ [member] Member currency:SGD
787 US$ [member] Member currency:USD
788 PKR$ [member] Member currency:PKR
789 Financial and capital risks management [line items] LineItems hnp:FinancialAndCapitalRisksManagementLineItems
790 Interest expense for the year higher/lower Concept (Monetary) For Period Debit hnp:ChangesInInterestRateImpactOnInterestExpense
791 40302 - Disclosure - Financial and capital risks management (Credit risk) (Detail) Network

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*

http://www.hpi.com.cn/role/FinancialAndCapitalRisksManagementCreditRiskDetail
792 Financial and capital risks management [table] Table

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*

hnp:FinancialAndCapitalRisksManagementTable
793 Segments [axis] Axis ifrs-full:SegmentsAxis
794 Segments [member] Member ifrs-full:SegmentsMember
795 Singapore segment [member] Member hnp:SingaporeSegmentMember
796 Financial and capital risks management [line items] LineItems hnp:FinancialAndCapitalRisksManagementLineItems
797 Minimum monthly consumption of electricity of retail customer Concept (Decimal) For Period hnp:MonthlyConsumptionOfElectricity
798 Cash deposits held by Singapore subsidiaries Concept (Monetary) As Of Credit ifrs-full:DepositsFromCustomers
799 40303 - Disclosure - Financial and capital risks management (Accounts receivable) (Detail) Network

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*

http://www.hpi.com.cn/role/FinancialAndCapitalRisksManagementAccountsReceivableDetail
800 Financial and capital risks management [table] Table

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hnp:FinancialAndCapitalRisksManagementTable
801 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
802 Past due status [member] Member ifrs-full:PastDueStatusMember
803 Current (not past due) [member] Member ifrs-full:CurrentMember
804 Within 1 year past due [member] Member ifrs-full:NotLaterThanOneYearMember
805 1 - 3 years past due [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember
806 More than 3 years past due [member] Member ifrs-full:LaterThanThreeYearsMember
807 Financial and capital risks management [line items] LineItems hnp:FinancialAndCapitalRisksManagementLineItems
808 Gross amounts of account receivables Concept (Monetary) As Of Debit hnp:GrossAmountsOfCurrentTradeReceivables
809 Loss allowance Concept (Monetary) As Of Credit hnp:ImpairmentLossRecognisedInProfitOrLossCurrentTradeReceivables
810 40304 - Disclosure - Financial and capital risks management (Other receivables) (Detail) Network

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*

http://www.hpi.com.cn/role/FinancialAndCapitalRisksManagementOtherReceivablesDetail
811 Financial and capital risks management [table] Table

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*

hnp:FinancialAndCapitalRisksManagementTable
812 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
813 Past due status [member] Member ifrs-full:PastDueStatusMember
814 Current (not past due) [member] Member ifrs-full:CurrentMember
815 Within 1 year past due [member] Member ifrs-full:NotLaterThanOneYearMember
816 1 - 3 years past due [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember
817 More than 3 years past due [member] Member ifrs-full:LaterThanThreeYearsMember
818 Financial and capital risks management [line items] LineItems hnp:FinancialAndCapitalRisksManagementLineItems
819 Gross carrying amount Concept (Monetary) As Of Debit hnp:GrossAmountOfOtherCurrentReceivablesSubjectToEclModel
820 Loss allowance Concept (Monetary) As Of Credit hnp:LossAllowanceOfOtherCurrentReceivablesSubjectToEclModel
821 40305 - Disclosure - Financial and capital risks management (Fair value measurements) (Detail) Network

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*

http://www.hpi.com.cn/role/FinancialAndCapitalRisksManagementFairValueMeasurementsDetail
822 Financial and capital risks management [table] Table

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hnp:FinancialAndCapitalRisksManagementTable
823 Measurement [axis] Axis ifrs-full:MeasurementAxis
824 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
825 Recurring fair value measurement [member] Member ifrs-full:RecurringFairValueMeasurementMember
826 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
827 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
828 Level 1 [member] Member ifrs-full:Level1OfFairValueHierarchyMember
829 Level 2 [member] Member ifrs-full:Level2OfFairValueHierarchyMember
830 Level 3 [member] Member ifrs-full:Level3OfFairValueHierarchyMember
831 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
832 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
833 Financial assets at fair value through profit or loss, Trading derivatives (Note 14) [member] Member ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTradingCategoryMember
834 Financial assets at fair value through profit or loss, contingent consideration [member] Member hnp:FinancialAssetsAtFairValueThroughProfitOrLossContingentConsiderationMember
835 Derivatives used for hedging (Note 14) [member] Member hnp:FinancialAssetsClassifiedAsDerivativesUsedForHedgingMember
836 Available-for-sale financial assets, Equity securities (Note 10) [member] Member ifrs-full:TradingEquitySecuritiesMember
837 Other equity instrument investments [member] Member ifrs-full:InvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember
838 Categories of financial liabilities [axis] Axis ifrs-full:CategoriesOfFinancialLiabilitiesAxis
839 Financial liabilities, category [member] Member ifrs-full:FinancialLiabilitiesCategoryMember
840 Financial liabilities at fair value through profit or loss, Trading derivatives (Note 14) [member] Member ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLossThatMeetDefinitionOfHeldForTradingCategoryMember
841 Derivatives used for hedging (Note 14) [member] Member hnp:FinancialLiabilitiesClassifiedAsDerivativesUsedForHedgingMember
842 Financial and capital risks management [line items] LineItems hnp:FinancialAndCapitalRisksManagementLineItems
843 Assets Concept (Monetary) As Of Debit ifrs-full:Assets
844 Liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
845 40306 - Disclosure - Financial and capital risks management (Fair value measurements) (Narrative) (Detail) Network

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http://www.hpi.com.cn/role/FinancialAndCapitalRisksManagementFairValueMeasurementsNarrativeDetail
846 Financial and capital risks management [table] Table

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*

hnp:FinancialAndCapitalRisksManagementTable
847 Measurement [axis] Axis ifrs-full:MeasurementAxis
848 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
849 At fair value [member] Member ifrs-full:AtFairValueMember
850 Valuation techniques used in fair value measurement [axis] Axis ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis
851 Valuation techniques [member] Member ifrs-full:ValuationTechniquesMember
852 Discounted cash flow [member] Member ifrs-full:DiscountedCashFlowMember
853 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
854 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
855 Level 3 [member] Member ifrs-full:Level3OfFairValueHierarchyMember
856 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
857 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
858 Other equity instrument investments [member] Member ifrs-full:InvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember
859 Financial and capital risks management [line items] LineItems hnp:FinancialAndCapitalRisksManagementLineItems
860 Discount rate used in valuation of financial assets Concept (Percent) For Period ifrs-full:InterestRateSignificantUnobservableInputsAssets
861 40307 - Disclosure - Financial and capital risks management (Transfer between levels of fair value hierarchy) (Detail) Network

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http://www.hpi.com.cn/role/FinancialAndCapitalRisksManagementTransferBetweenLevelsOfFairValueHierarchyDetail
862 Implied Table Table

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implied:Table
863 Financial and capital risks management [abstract] Abstract hnp:FinancialAndCapitalRisksManagementAbstract
864 Transfers out of Level 1 into Level 2 of fair value hierarchy, assets held at end of reporting period Concept (Monetary) For Period ifrs-full:TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyAssets
865 Transfers out of Level 2 into Level 1 of fair value hierarchy, assets held at end of reporting period Concept (Monetary) For Period ifrs-full:TransfersOutOfLevel2IntoLevel1OfFairValueHierarchyAssets
866 Transfers into Level 3 of fair value hierarchy, assets Concept (Monetary) For Period Debit ifrs-full:TransfersIntoLevel3OfFairValueHierarchyAssets
867 Transfers out of Level 3 of fair value hierarchy, assets Concept (Monetary) For Period Credit ifrs-full:TransfersOutOfLevel3OfFairValueHierarchyAssets
868 Transfers out of Level 1 into Level 2 of fair value hierarchy, liabilities held at end of reporting period Concept (Monetary) For Period ifrs-full:TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyLiabilities
869 Transfers out of Level 2 into Level 1 of fair value hierarchy, liabilities held at end of reporting period Concept (Monetary) For Period ifrs-full:TransfersOutOfLevel2IntoLevel1OfFairValueHierarchyLiabilities
870 Transfers into Level 3 of fair value hierarchy, liabilities Concept (Monetary) For Period Credit ifrs-full:TransfersIntoLevel3OfFairValueHierarchyLiabilities
871 Transfers out of Level 3 of fair value hierarchy, liabilities Concept (Monetary) For Period Debit ifrs-full:TransfersOutOfLevel3OfFairValueHierarchyLiabilities
872 40308 - Disclosure - Financial and capital risks management (Movements of contingent consideration during the period in the balance of the Level 3 fair value measurements) (Detail) Network

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http://www.hpi.com.cn/role/FinancialAndCapitalRisksManagementMovementsOfContingentConsiderationDuringThePeriodInTheBalanceOfTheLevel3FairValueMeasurementsDetail
873 Financial and capital risks management [table] Table

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hnp:FinancialAndCapitalRisksManagementTable
874 Measurement [axis] Axis ifrs-full:MeasurementAxis
875 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
876 At fair value [member] Member ifrs-full:AtFairValueMember
877 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
878 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
879 Level 3 [member] Member ifrs-full:Level3OfFairValueHierarchyMember
880 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
881 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
882 Contingent consideration [member] Member hnp:FinancialAssetsAtFairValueThroughProfitOrLossContingentConsiderationMember
883 Financial and capital risks management [line items] LineItems hnp:FinancialAndCapitalRisksManagementLineItems
884 Beginning of the year Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
885 Movement: Abstract hnp:ChangesOfFairValueMeasurementsAbstract
886 Gains on fair value changes Concept (Monetary) For Period Credit hnp:GainsLossesRecognisedInFairValueChangesFinancialAssets
887 Profit compensation received from Huaneng Group Concept (Monetary) For Period Credit hnp:ProfitCompensationReceivedFromUltimateParentCompanyOfCompany
888 End of the year Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
889 Total gains for the year included in profit or loss for assets held at the end of the reporting period Concept (Monetary) For Period ifrs-full:GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets
890 40309 - Disclosure - Financial and capital risks management (Movements of other equity instrument investments during the period in the balance of the Level 3 fair value measurements) (Detail) Network

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http://www.hpi.com.cn/role/FinancialAndCapitalRisksManagementMovementsOfOtherEquityInstrumentInvestmentsDuringThePeriodInTheBalanceOfTheLevel3FairValueMeasurementsDetail
891 Financial and capital risks management [table] Table

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hnp:FinancialAndCapitalRisksManagementTable
892 Measurement [axis] Axis ifrs-full:MeasurementAxis
893 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
894 At fair value [member] Member ifrs-full:AtFairValueMember
895 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
896 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
897 Level 3 [member] Member ifrs-full:Level3OfFairValueHierarchyMember
898 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
899 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
900 Other equity instrument investments [member] Member ifrs-full:InvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember
901 Financial and capital risks management [line items] LineItems hnp:FinancialAndCapitalRisksManagementLineItems
902 Beginning of the year Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsCarryingAmountImmediatelyBeforeInitialApplicationOfIFRS9
903 Adjustment on initial application of IFRS 9 (Note 2(b)(i)) Concept (Monetary) As Of Debit hnp:FinancialAssetsIncreaseDecreaseThroughChangesInAccountingPolicies
904 Adjusted balance at the beginning of the year Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsCarryingAmountImmediatelyAfterInitialApplicationOfIFRS9
905 Addition Concept (Monetary) For Period Credit hnp:AdditionOfFinancialAssets
906 Fair value changes Concept (Monetary) For Period Credit hnp:GainsLossesRecognisedInFairValueChangesFinancialAssets
907 End of the year Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
908 Changes in fair value recognised in other comprehensive income for the year Concept (Monetary) For Period ifrs-full:GainsLossesRecognisedInOtherComprehensiveIncomeFairValueMeasurementAssets
909 40310 - Disclosure - Financial and capital risks management (Fair value disclosures) (Detail) Network

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http://www.hpi.com.cn/role/FinancialAndCapitalRisksManagementFairValueDisclosuresDetail
910 Financial and capital risks management [table] Table

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hnp:FinancialAndCapitalRisksManagementTable
911 Measurement [axis] Axis ifrs-full:MeasurementAxis
912 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
913 At fair value [member] Member ifrs-full:AtFairValueMember
914 Classes of liabilities [axis] Axis ifrs-full:ClassesOfLiabilitiesAxis
915 Liabilities [member] Member ifrs-full:LiabilitiesMember
916 Long-term loans [member] Member hnp:LongTermLoansMember
917 Long-term bonds [member] Member hnp:LongTermBondsMember
918 Financial and capital risks management [line items] LineItems hnp:FinancialAndCapitalRisksManagementLineItems
919 Liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
920 40311 - Disclosure - Financial and capital risks management (Capital risk management) (Detail) Network

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*

http://www.hpi.com.cn/role/FinancialAndCapitalRisksManagementCapitalRiskManagementDetail
921 Implied Table Table

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implied:Table
922 Financial and capital risks management [abstract] Abstract hnp:FinancialAndCapitalRisksManagementAbstract
923 Debt ratio of the Company and its subsidiaries Concept (Percent) As Of hnp:DebtRatio
924 40400 - Disclosure - Critical accounting estimates and judgments (Detail) Network

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*

http://www.hpi.com.cn/role/CriticalAccountingEstimatesAndJudgmentsDetail
925 Disclosure of changes in accounting estimates [table] Table

*

*

ifrs-full:DisclosureOfChangesInAccountingEstimatesTable
926 Accounting estimates [axis] Axis ifrs-full:AccountingEstimatesAxis
927 Accounting estimates [member] Member ifrs-full:AccountingEstimatesMember
928 Decrease 1% from management's estimates of tariff [member] Member hnp:DecreaseOnePercentFromManagementsEstimatesOfTariffMember
929 Decrease 5% from management's estimates of tariff [member] Member hnp:DecreaseFivePercentFromManagementsEstimatesOfTariffMember
930 Increase 1% from management's estimates of fuel price [member] Member hnp:IncreaseOnePercentFromManagementsEstimatesOfFuelPriceMember
931 Increase 5% from management's estimates of fuel price [member] Member hnp:IncreaseFivePercentFromManagementsEstimatesOfFuelPriceMember
932 Cash-generating units [axis] Axis ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
933 Entity's total for cash-generating units [member] Member ifrs-full:EntitysTotalForCashgeneratingUnitsMember
934 PRC power segment [member] Member hnp:PrcPowerSegmentMember
935 Disclosure of changes in accounting estimates [line items] LineItems ifrs-full:DisclosureOfChangesInAccountingEstimatesLineItems
936 Impairment against goodwill to be further recognised by the Company and its subsidiaries Concept (Monetary) For Period Debit hnp:IncreaseOrDecreaseOfImpairmentLossRecognisedInProfitOrLossGoodwill
937 Impairment against property, plant and equipment, land use rights and mining rights to be further recognised by the Company and its subsidiaries Concept (Monetary) For Period Debit hnp:IncreaseOrDecreaseOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipmentLandUseRightsAndMiningRights
938 40500 - Disclosure - Revenue and segment information (Disclosure of disaggregation of revenue) (Detail) Network

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http://www.hpi.com.cn/role/RevenueAndSegmentInformationDisclosureOfDisaggregationOfRevenueDetail
939 Disclosure of disaggregation of revenue from contracts with customers [table] Table

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ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable
940 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
941 Products and services [member] Member ifrs-full:ProductsAndServicesMember
942 Sales of power and heat [member] Member hnp:SalesOfPowerAndHeatMember
943 Sales of coal and raw material [member] Member hnp:SalesOfCoalAndRawMaterialMember
944 Port service [member] Member hnp:PortServiceMember
945 Transportation service [member] Member hnp:TransportationServiceMember
946 Others [member] Member hnp:OtherProductOrServiceMember
947 Segments [axis] Axis ifrs-full:SegmentsAxis
948 Segments [member] Member ifrs-full:SegmentsMember
949 PRC power segment [member] Member hnp:PrcPowerSegmentMember
950 Overseas segment [member] Member hnp:OverseasSegmentMember
951 All other segments [member] Member ifrs-full:AllOtherSegmentsMember
952 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
953 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
954 Reportable segment total [member] Member hnp:OperatingSegmentsAfterEliminationMember
955 Operating segments [member] Member ifrs-full:OperatingSegmentsMember
956 Inter-segment [member] Member ifrs-full:EliminationOfIntersegmentAmountsMember
957 Disclosure of operating segments [line items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
958 Total revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
959 Revenue from contracts with customers within the scope of IFRS15 Concept (Monetary) For Period Credit ifrs-full:RevenueFromContractsWithCustomers
960 Revenue from other sources Concept (Monetary) For Period Credit hnp:RevenueFromOtherSources
961 40501 - Disclosure - Revenue and segment information (Revenue information under PRC GAAP) (Detail) Network

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http://www.hpi.com.cn/role/RevenueAndSegmentInformationRevenueInformationUnderPrcGaapDetail
962 Disclosure of operating segments [table] Table

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ifrs-full:DisclosureOfOperatingSegmentsTable
963 Segments [axis] Axis ifrs-full:SegmentsAxis
964 Segments [member] Member ifrs-full:SegmentsMember
965 PRC power segment [member] Member hnp:PrcPowerSegmentMember
966 Overseas segment [member] Member hnp:OverseasSegmentMember
967 All other segments [member] Member ifrs-full:AllOtherSegmentsMember
968 Financial effect of transition from previous GAAP to IFRSs [axis] Axis ifrs-full:FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis
969 IFRSs [member] Member ifrs-full:IFRSsMember
970 PRC GAAP [member] Member ifrs-full:PreviousGAAPMember
971 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
972 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
973 External revenue [member] Member hnp:OperatingSegmentsAfterEliminationMember
974 Total [member] Member ifrs-full:OperatingSegmentsMember
975 Inter-segment [member] Member ifrs-full:EliminationOfIntersegmentAmountsMember
976 Disclosure of operating segments [line items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
977 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
978 Segment results Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
979 Interest income Concept (Monetary) For Period Credit ifrs-full:RevenueFromInterest
980 Interest expense Concept (Monetary) For Period Debit ifrs-full:InterestExpense
981 Impairment loss Concept (Monetary) For Period Debit hnp:OtherImpairmentLoss
982 Credit loss Concept (Monetary) For Period Debit hnp:CreditImpairmentLoss
983 Impairment (loss)/reversal Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
984 Depreciation and amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
985 Net gain/(loss) on disposal of non-current assets Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnDisposalsOfNoncurrentAssets
986 Share of profits less losses of associates and joint ventures Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
987 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
988 40502 - Disclosure - Revenue and segment information (Assets and liabilities information under PRC GAAP) (Detail) Network

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http://www.hpi.com.cn/role/RevenueAndSegmentInformationAssetsAndLiabilitiesInformationUnderPrcGaapDetail
989 Disclosure of operating segments [table] Table

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ifrs-full:DisclosureOfOperatingSegmentsTable
990 Segments [axis] Axis ifrs-full:SegmentsAxis
991 Segments [member] Member ifrs-full:SegmentsMember
992 PRC power segment [member] Member hnp:PrcPowerSegmentMember
993 Overseas segment [member] Member hnp:OverseasSegmentMember
994 All other segments [member] Member ifrs-full:AllOtherSegmentsMember
995 Financial effect of transition from previous GAAP to IFRSs [axis] Axis ifrs-full:FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis
996 IFRSs [member] Member ifrs-full:IFRSsMember
997 PRC GAAP [member] Member ifrs-full:PreviousGAAPMember
998 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
999 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
1000 Reportable segment total [member] Member hnp:OperatingSegmentsAfterEliminationMember
1001 Disclosure of operating segments [line items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
1002 Segment assets Concept (Monetary) As Of Debit ifrs-full:Assets
1003 Including: Abstract hnp:ComponentOfAssetsAbstract
1004 Additions to non-current assets (excluding financial assets and deferred income tax assets) Concept (Monetary) For Period Debit ifrs-full:AdditionsToNoncurrentAssets
1005 Investments in associates Concept (Monetary) As Of Debit ifrs-full:InvestmentsInAssociates
1006 Investments in joint ventures Concept (Monetary) As Of Debit ifrs-full:InvestmentsInJointVentures
1007 Segment liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
1008 40503 - Disclosure - Revenue and segment information (Reconciliation of external revenue to operating revenue) (Detail) Network

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http://www.hpi.com.cn/role/RevenueAndSegmentInformationReconciliationOfExternalRevenueToOperatingRevenueDetail
1009 Reconciliation of external revenue to operating revenue [table] Table

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hnp:ReconciliationOfExternalRevenueToOperatingRevenueTable
1010 Financial effect of transition from previous GAAP to IFRSs [axis] Axis ifrs-full:FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis
1011 IFRSs [member] Member ifrs-full:IFRSsMember
1012 PRC GAAP [member] Member ifrs-full:PreviousGAAPMember
1013 Impact of restatement under PRC GAAP in relation to business combination under common control (Note 41) [member] Member ifrs-full:EffectOfTransitionToIFRSsMember
1014 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
1015 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
1016 External revenue [member] Member hnp:OperatingSegmentsAfterEliminationMember
1017 Reconciliation of external revenue to operating revenue [line items] LineItems hnp:ReconciliationOfExternalRevenueToOperatingRevenueLineItems
1018 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
1019 40504 - Disclosure - Revenue and segment information (Reconciliation of segment result to profit before income tax expense) (Detail) Network

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http://www.hpi.com.cn/role/RevenueAndSegmentInformationReconciliationOfSegmentResultToProfitBeforeIncomeTaxExpenseDetail
1020 Reconciliation of segment result to profit before income tax expense [table] Table

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hnp:ReconciliationOfSegmentResultToProfitBeforeIncomeTaxExpenseTable
1021 Financial effect of transition from previous GAAP to IFRSs [axis] Axis ifrs-full:FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis
1022 IFRSs [member] Member ifrs-full:IFRSsMember
1023 PRC GAAP [member] Member ifrs-full:PreviousGAAPMember
1024 Effect of transition to IFRSs [member] Member ifrs-full:EffectOfTransitionToIFRSsMember
1025 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
1026 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
1027 Reportable segment total [member] Member hnp:OperatingSegmentsAfterEliminationMember
1028 Loss related to the headquarter [member] Member hnp:LossRelatedToHeadquarterMember
1029 Investment income from China Huaneng Finance Co., Ltd. ("Huaneng Finance") [member] Member hnp:InvestmentIncomeFromChinaHuanengFinanceCoLtdMember
1030 Dividend income of available-for-sale financial assets [member] Member hnp:DividendIncomeOfAvailableForSaleFinancialAssetsMember
1031 Dividend income of other equity instruments investments [member] Member hnp:DividendIncomeOfOtherEquityInstrumentsInvestmentsMember
1032 Gains on disposal of available-for-sale financial asset [member] Member hnp:GainsOnDisposalOfAvailableForSaleFinancialAssetMember
1033 Reconciling items of transition to IFRS [axis] Axis hnp:ReconcilingItemsOfTransitionToIfrsAxis
1034 Reconciling items of transition to IFRS [member] Member hnp:ReconcilingItemsOfTransitionToIfrsMember
1035 Impact of restatement under PRC GAAP in relation to business combination under common control (Note 41) [member] Member hnp:ImpactOfRestatementUnderPrcGaapInRelationToBusinessCombinationUnderCommonControlMember
1036 Impact of other IFRS adjustments [member] Member hnp:ImpactOfOtherIfrsAdjustmentsMember
1037 Reconciliation of segment result to profit before income tax expense [line items] LineItems hnp:ReconciliationOfSegmentResultToProfitBeforeIncomeTaxExpenseLineItems
1038 Profit before income tax expense Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
1039 40505 - Disclosure - Revenue and segment information (Reportable segments' assets reconciled to total assets) (Detail) Network

*

*

http://www.hpi.com.cn/role/RevenueAndSegmentInformationReportableSegmentsAssetsReconciledToTotalAssetsDetail
1040 Reportable segments' assets [table] Table

*

*

hnp:ReportableSegmentsAssetsTable
1041 Financial effect of transition from previous GAAP to IFRSs [axis] Axis ifrs-full:FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis
1042 IFRSs [member] Member ifrs-full:IFRSsMember
1043 PRC GAAP [member] Member ifrs-full:PreviousGAAPMember
1044 Effect of transition to IFRSs [member] Member ifrs-full:EffectOfTransitionToIFRSsMember
1045 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
1046 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
1047 Reportable segment total [member] Member hnp:OperatingSegmentsAfterEliminationMember
1048 Investment in Huaneng Finance [member] Member hnp:InvestmentInHuanengFinanceMember
1049 Deferred income tax assets [member] Member hnp:DeferredIncomeTaxAssetsMember
1050 Prepaid income tax [member] Member hnp:PrepaidIncomeTaxMember
1051 Available-for-sale financial assets [member] Member ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
1052 Other equity instrument investments [member] Member ifrs-full:InvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember
1053 Corporate assets [member] Member hnp:CorporateAssetsMember
1054 Reconciling items of transition to IFRS [axis] Axis hnp:ReconcilingItemsOfTransitionToIfrsAxis
1055 Reconciling items of transition to IFRS [member] Member hnp:ReconcilingItemsOfTransitionToIfrsMember
1056 Impact of restatement under PRC GAAP in relation to business combination under common control (Note 41) [member] Member hnp:ImpactOfRestatementUnderPrcGaapInRelationToBusinessCombinationUnderCommonControlMember
1057 Impact of other IFRS adjustments [member] Member hnp:ImpactOfOtherIfrsAdjustmentsMember
1058 Reportable segments' assets [line items] LineItems hnp:ReportableSegmentsAssetsLineItems
1059 Segment assets Concept (Monetary) As Of Debit ifrs-full:Assets
1060 40506 - Disclosure - Revenue and segment information (Reportable segments' liabilities reconciled to total liabilities) (Detail) Network

*

*

http://www.hpi.com.cn/role/RevenueAndSegmentInformationReportableSegmentsLiabilitiesReconciledToTotalLiabilitiesDetail
1061 Reportable segments' liabilities [table] Table

*

*

hnp:ReportableSegmentsLiabilitiesTable
1062 Financial effect of transition from previous GAAP to IFRSs [axis] Axis ifrs-full:FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis
1063 IFRSs [member] Member ifrs-full:IFRSsMember
1064 PRC GAAP [member] Member ifrs-full:PreviousGAAPMember
1065 Effect of transition to IFRSs [member] Member ifrs-full:EffectOfTransitionToIFRSsMember
1066 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
1067 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
1068 Reportable segment total [member] Member hnp:OperatingSegmentsAfterEliminationMember
1069 Current income tax liabilities [member] Member hnp:CurrentIncomeTaxLiabilitiesMember
1070 Deferred income tax liabilities [member] Member hnp:DeferredIncomeTaxLiabilitiesMember
1071 Corporate liabilities [member] Member hnp:CorporateLiabilitiesMember
1072 Reconciling items of transition to IFRS [axis] Axis hnp:ReconcilingItemsOfTransitionToIfrsAxis
1073 Reconciling items of transition to IFRS [member] Member hnp:ReconcilingItemsOfTransitionToIfrsMember
1074 Impact of restatement under PRC GAAP in relation to business combination under common control (Note 41) [member] Member hnp:ImpactOfRestatementUnderPrcGaapInRelationToBusinessCombinationUnderCommonControlMember
1075 Impact of other IFRS adjustments [member] Member hnp:ImpactOfOtherIfrsAdjustmentsMember
1076 Reportable segments' liabilities [line items] LineItems hnp:ReportableSegmentsLiabilitiesLineItems
1077 Segment liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
1078 40507 - Disclosure - Revenue and segment information (Other material items) (Detail) Network

*

*

http://www.hpi.com.cn/role/RevenueAndSegmentInformationOtherMaterialItemsDetail
1079 Other material items [table] Table

*

*

hnp:OtherMaterialItemsTable
1080 Financial effect of transition from previous GAAP to IFRSs [axis] Axis ifrs-full:FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis
1081 IFRSs [member] Member ifrs-full:IFRSsMember
1082 PRC GAAP [member] Member ifrs-full:PreviousGAAPMember
1083 Effect of transition to IFRSs [member] Member ifrs-full:EffectOfTransitionToIFRSsMember
1084 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
1085 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
1086 Reportable segment total [member] Member hnp:OperatingSegmentsAfterEliminationMember
1087 Headquarters [member] Member hnp:HeadquartersMember
1088 Investment income from Huaneng Finance [member] Member hnp:InvestmentIncomeFromChinaHuanengFinanceCoLtdMember
1089 Reconciling items of transition to IFRS [axis] Axis hnp:ReconcilingItemsOfTransitionToIfrsAxis
1090 Reconciling items of transition to IFRS [member] Member hnp:ReconcilingItemsOfTransitionToIfrsMember
1091 Impact of restatement under PRC GAAP in relation to business combination under common control [member] Member hnp:ImpactOfRestatementUnderPrcGaapInRelationToBusinessCombinationUnderCommonControlMember
1092 Impact of other IFRS adjustments [member] Member hnp:ImpactOfOtherIfrsAdjustmentsMember
1093 Other material items [line items] LineItems hnp:OtherMaterialItemsLineItems
1094 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
1095 Interest expense Concept (Monetary) For Period Debit ifrs-full:InterestExpense
1096 Depreciation and amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
1097 Impairment loss Concept (Monetary) For Period Debit hnp:OtherImpairmentLoss
1098 Credit loss Concept (Monetary) For Period Debit hnp:CreditImpairmentLoss
1099 Impairment loss Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
1100 Share of profits less losses of associates and joint ventures Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1101 Net gain/(loss) on disposal of non-current assets Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnDisposalsOfNoncurrentAssets
1102 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
1103 40508 - Disclosure - Revenue and segment information (Geographical information (Under IFRS)) (Detail) Network

*

*

http://www.hpi.com.cn/role/RevenueAndSegmentInformationGeographicalInformationUnderIfrsDetail
1104 Geographical information (Under IFRS) [table] Table

*

*

hnp:ExternalRevenueGeneratedFromCountriesTable
1105 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1106 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1107 PRC [member] Member country:CN
1108 Overseas [member] Member hnp:OverseasMember
1109 Geographical information (Under IFRS) [line items] LineItems hnp:ExternalRevenueGeneratedFromCountriesLineItems
1110 External revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
1111 Non-current assets (excluding financial assets and deferred income tax assets) Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts
1112 40509 - Disclosure - Revenue and segment information (Information on sales to major customers) (Detail) Network

*

*

http://www.hpi.com.cn/role/RevenueAndSegmentInformationInformationOnSalesToMajorCustomersDetail
1113 Information on sales to major customers [table] Table

*

*

ifrs-full:DisclosureOfMajorCustomersTable
1114 Major customers [axis] Axis ifrs-full:MajorCustomersAxis
1115 Customers [member] Member ifrs-full:MajorCustomersMember
1116 State Grid Shandong Electric Power Company [member] Member hnp:StateGridShandongElectricPowerCompanyMember
1117 Grid companies under common control of State Grid Corporation of China [member] Member hnp:GridCompaniesUnderCommonControlOfStateGridCorporationOfChinaMember
1118 Information on sales to major customers [line items] LineItems ifrs-full:DisclosureOfMajorCustomersLineItems
1119 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
1120 Proportion Concept (Percent) For Period ifrs-full:PercentageOfEntitysRevenue
1121 40510 - Disclosure - Revenue and segment information (Contract balances) (Detail) Network

*

*

http://www.hpi.com.cn/role/RevenueAndSegmentInformationContractBalancesDetail
1122 Disclosure of contract liabilities [table] Table

*

*

hnp:DisclosureOfContractLiabilitiesTable
1123 Type of fee received in advance [axis] Axis hnp:TypeOfFeeReceivedInAdvanceAxis
1124 Type of fee received in advance [member] Member hnp:TypeOfFeeReceivedInAdvanceMember
1125 Heat sales and heating pipeline upfront fees [member] Member hnp:HeatSalesAndHeatingPipelineUpfrontFeesMember
1126 Heat sales [member] Member hnp:HeatSalesMember
1127 Heat pipeline upfront fees [member] Member hnp:HeatPipelineUpfrontFeesMember
1128 Disclosure of contract liabilities [line items] LineItems hnp:DisclosureOfContractLiabilitiesLineItems
1129 Contract liabilities Concept (Monetary) As Of Credit ifrs-full:ContractLiabilities
1130 The amount recognised in contract liabilities at the beginning of the period Concept (Monetary) For Period Credit ifrs-full:RevenueThatWasIncludedInContractLiabilityBalanceAtBeginningOfPeriod
1131 40600 - Disclosure - Profit before income tax expense (Detail) Network

*

*

http://www.hpi.com.cn/role/ProfitBeforeIncomeTaxExpenseDetail
1132 Implied Table Table

*

*

implied:Table
1133 Profit before income tax expense [abstract] Abstract hnp:ProfitBeforeIncomeTaxExpenseAbstract
1134 Total interest expense on borrowing Concept (Monetary) For Period ifrs-full:InterestCostsIncurred
1135 Less: amounts capitalized in property, plant and equipment Concept (Monetary) For Period ifrs-full:InterestCostsCapitalised
1136 Interest expenses charged in consolidated statement of comprehensive income Concept (Monetary) For Period Debit ifrs-full:InterestExpense
1137 Auditors' remuneration-audit services Concept (Monetary) For Period Debit ifrs-full:AuditorsRemunerationForAuditServices
1138 Operating leases charge Concept (Monetary) For Period Debit hnp:OperatingLeasesCharge
1139 Fuel Concept (Monetary) For Period Debit ifrs-full:FuelExpense
1140 Depreciation of property, plant and equipment Concept (Monetary) For Period Debit ifrs-full:DepreciationExpense
1141 Amortization of land use rights Concept (Monetary) For Period Debit hnp:AmortizationOfLandUseRights
1142 Amortization of other non-current assets Concept (Monetary) For Period Debit hnp:AmortizationOfOtherNonCurrentAssets
1143 Impairment loss of property, plant and equipment (Note 7) Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
1144 Impairment loss for land use rights (Note 11) Concept (Monetary) For Period Debit hnp:ImpairmentLossRecognisedInProfitOrLossLandUseRights
1145 Impairment loss of mining rights (Note 13) Concept (Monetary) For Period Debit hnp:ImpairmentLossRecognisedInProfitOrLossMiningRights
1146 Impairment loss of goodwill (Note 15) Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill
1147 Impairment loss of other non-current assets Concept (Monetary) For Period Debit hnp:ImpairmentLossRecognisedInProfitOrLossOtherNonCurrentAssets
1148 Recognition of loss allowance for receivables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossTradeAndOtherReceivables
1149 Recognition/(reversal) of provision for inventory obsolescence (Note 17) Concept (Monetary) For Period Debit ifrs-full:WritedownsReversalsOfInventories
1150 Net (gain)/ loss on disposals of non-current assets Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnDisposalsOfNoncurrentAssets
1151 Government grants Concept (Monetary) For Period Credit ifrs-full:RevenueFromGovernmentGrants
1152 Gain on a bargain purchase Concept (Monetary) For Period Credit ifrs-full:GainRecognisedInBargainPurchaseTransaction
1153 Included in other investment income [abstract] Abstract hnp:IncludedInOtherInvestmentIncomeAbstract
1154 Gains on disposal of available-for-sale financial assets Concept (Monetary) For Period Credit hnp:GainsLossesOnDisposalOfAvailableForSaleFinancialAssets
1155 Dividends on available-for-sale financial assets Concept (Monetary) For Period Credit hnp:DividendsOnAvailableForSaleFinancialAssets
1156 Dividends on other equity instruments investment Concept (Monetary) For Period Credit hnp:DividendsOnOtherEquityInstrumentsInvestment
1157 Gains on disposal of subsidiaries Concept (Monetary) For Period Credit hnp:GainsLossesOnDisposalOfSubsidiaries
1158 Loss on disposal of a joint venture (Note 41(b)) Concept (Monetary) For Period Credit hnp:GainLossOnDisposalOfJointVentures
1159 Included in (gain)/loss on fair value changes of financial assets/liabilities Abstract hnp:IncludedInGainLossOnFairValueChangesOfFinancialAssetsLiabilitiesAbstract
1160 Contingent consideration of the business combination Concept (Monetary) For Period Credit hnp:GainLossOnFairValueChangesOfContingentConsideration
1161 Loss on fair value changes of trading derivatives Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
1162 40700 - Disclosure - Property, plant and equipment (Detail) Network

*

*

http://www.hpi.com.cn/role/PropertyPlantAndEquipmentDetail
1163 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1164 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1165 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
1166 Dam [member] Member hnp:DamMember
1167 Port facilities [member] Member hnp:PortFacilitiesMember
1168 Buildings [member] Member ifrs-full:BuildingsMember
1169 Electric utility plant in service [member] Member hnp:ElectricUtilityPlantInServiceMember
1170 Transportation facilities [member] Member ifrs-full:VehiclesMember
1171 Others [member] Member ifrs-full:OtherPropertyPlantAndEquipmentMember
1172 CIP [member] Member ifrs-full:ConstructionInProgressMember
1173 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1174 Carrying amount [member] Member ifrs-full:CarryingAmountMember
1175 Cost [member] Member ifrs-full:GrossCarryingAmountMember
1176 Accumulated depreciation [member] Member ifrs-full:AccumulatedDepreciationAndAmortisationMember
1177 Accumulated impairment loss [member] Member ifrs-full:AccumulatedImpairmentMember
1178 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1179 Beginning of the year Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1180 Reclassification Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesPropertyPlantAndEquipment
1181 Business combination (Note 41) Concept (Monetary) For Period Debit ifrs-full:AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment
1182 Additions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
1183 Transfer from CIP Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersFromConstructionInProgressPropertyPlantAndEquipment
1184 Reclassification to assets held for sale (Note 20) Concept (Monetary) For Period Credit ifrs-full:DecreaseThroughClassifiedAsHeldForSalePropertyPlantAndEquipment
1185 Disposals/write-off Concept (Monetary) For Period Credit ifrs-full:DisposalsAndRetirementsPropertyPlantAndEquipment
1186 Disposal of subsidiaries Concept (Monetary) For Period Credit ifrs-full:DecreaseThroughLossOfControlOfSubsidiaryPropertyPlantAndEquipment
1187 Depreciation charge Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
1188 Impairment charge Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
1189 Currency translation differences Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
1190 End of the year Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1191 40701 - Disclosure - Property, plant and equipment (Interest capitalization) (Detail) Network

*

*

http://www.hpi.com.cn/role/PropertyPlantAndEquipmentInterestCapitalizationDetail
1192 Implied Table Table

*

*

implied:Table
1193 Property, plant and equipment [abstract] Abstract ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
1194 Interest expense arising on borrowings Concept (Monetary) For Period Debit hnp:AmountsOfInterestExpenseCapitalizedInPropertyPlantAndEquipment
1195 Weighted average capitalization rate Concept (Percent) For Period hnp:WeightedAverageCapitalizationRateOfInterestExpenseOnBorrowingsForConstructionOfPropertyPlantAndEquipment
1196 40702 - Disclosure - Property, plant and equipment (Impairment) (Detail) Network

*

*

http://www.hpi.com.cn/role/PropertyPlantAndEquipmentImpairmentDetail
1197 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1198 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1199 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
1200 Power plants one [member] Member hnp:PowerPlantsOneMember
1201 Power plants two [member] Member hnp:PowerPlantsTwoMember
1202 Power plants three [member] Member hnp:PowerPlantsThreeMember
1203 Power plants four [member] Member hnp:PowerPlantsFourMember
1204 Power plants five [member] Member hnp:PowerPlantsFiveMember
1205 Power plants six [member] Member hnp:PowerPlantsSixMember
1206 Power plants seven [member] Member hnp:PowerPlantsSevenMember
1207 Coal-fired power plant one [member] Member hnp:CoalFiredPowerPlantOneMember
1208 Coal-fired power plant two [member] Member hnp:CoalFiredPowerPlantTwoMember
1209 Coal-fired power plant three [member] Member hnp:CoalFiredPowerPlantThreeMember
1210 Coal-fired power plant four [member] Member hnp:CoalFiredPowerPlantFourMember
1211 Hydropower plant one [member] Member hnp:HydropowerPlantOneMember
1212 Coal-fired power project one in construction [member] Member hnp:CoalFiredPowerProjectOneInConstructionMember
1213 Wind power power project in construction [member] Member hnp:WindPowerPowerProjectInConstructionMember
1214 Coal-fired power project two in construction [member] Member hnp:CoalFiredPowerProjectTwoInConstructionMember
1215 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1216 Impairment loss of property, plant and equipment (Note 7) Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
1217 Impairment loss for land use rights (Note 11) Concept (Monetary) For Period Debit hnp:ImpairmentLossRecognisedInProfitOrLossLandUseRights
1218 Discount rates Concept (Percent) As Of ifrs-full:DescriptionOfDiscountRatesUsedInCurrentEstimateOfValueInUse
1219 40703 - Disclosure - Property, plant and equipment (Property, plant and equipment held under finance leases) (Detail) Network

*

*

http://www.hpi.com.cn/role/PropertyPlantAndEquipmentPropertyPlantAndEquipmentHeldUnderFinanceLeasesDetail
1220 Implied Table Table

*

*

implied:Table
1221 Property, plant and equipment [abstract] Abstract ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
1222 Original cost Concept (Monetary) As Of Debit hnp:OriginalCostOfPropertyPlantAndEquipmentHeldUnderFinanceLeases
1223 40704 - Disclosure - Property, plant and equipment (Buildings without ownership certificate) (Detail) Network

*

*

http://www.hpi.com.cn/role/PropertyPlantAndEquipmentBuildingsWithoutOwnershipCertificateDetail
1224 Implied Table Table

*

*

implied:Table
1225 Property, plant and equipment [abstract] Abstract ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
1226 Aggregate net book value Concept (Monetary) As Of Debit hnp:NetBookValueOfBuildingsWithoutOwnershipCertificate
1227 40800 - Disclosure - Investments in associates and joint ventures (Summary of investments in associates and joint ventures) (Detail) Network

*

*

http://www.hpi.com.cn/role/InvestmentsInAssociatesAndJointVenturesSummaryOfInvestmentsInAssociatesAndJointVenturesDetail
1228 Implied Table Table

*

*

implied:Table
1229 Investments in associates and joint ventures [abstract] Abstract hnp:InvestmentsInAssociatesAndJointVenturesAbstract
1230 Beginning of the year Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
1231 Capital injections in associates and joint ventures Concept (Monetary) For Period Debit hnp:IncreaseDecreaseOfInvestmentsInAssociatesAndJointVenturesDueToCapitalInjections
1232 Business combination Concept (Monetary) For Period Debit hnp:IncreaseDecreaseOfInvestmentsInAssociatesAndJointVenturesDueToBusinessCombination
1233 Transfer from available-for-sale Concept (Monetary) For Period Debit hnp:IncreaseOfInvestmentsInAssociatesAndJointVenturesDueToTransferFromAvailableForSale
1234 Transfer to subsidiaries (Note 41 (b)) Concept (Monetary) For Period Credit hnp:DecreaseOfInvestmentsInAssociatesAndJointVenturesDueToTransferToSubsidiaries
1235 Share of net profit less loss Concept (Monetary) For Period Debit hnp:IncreaseDecreaseOfInvestmentsInAssociatesAndJointVenturesDueToAdjustmentOfShareOfNetProfitLessLoss
1236 Share of other comprehensive (loss)/income Concept (Monetary) For Period Debit hnp:IncreaseDecreaseOfInvestmentsInAssociatesAndJointVenturesDueToChangesOfShareOfOtherComprehensiveLossIncome
1237 Currency translation differences Concept (Monetary) For Period Debit hnp:IncreaseDecreaseOfInvestmentsInAssociatesAndJointVenturesDueToCurrencyTranslationDifferences
1238 Share of other capital reserve of equity-method investees Concept (Monetary) For Period Debit hnp:IncreaseDecreaseOfInvestmentsInAssociatesAndJointVenturesDueToChangesOfShareOfOtherCapitalReserveOfEquityMethodInvestees
1239 Dividends Concept (Monetary) For Period Credit hnp:DecreaseOfInvestmentsInAssociatesAndJointVenturesDueToDividends
1240 Elimination of unrealized profits on transactions with equity-method investees Concept (Monetary) For Period Credit hnp:DecreaseOfInvestmentsInAssociatesAndJointVenturesDueToEliminationOfUnrealizedProfitsOnTransactionsWithEquityMethodInvestees
1241 End of the year Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
1242 40801 - Disclosure - Investments in associates and joint ventures (Basic information of material associates and joint ventures) (Detail) Network

*

*

http://www.hpi.com.cn/role/InvestmentsInAssociatesAndJointVenturesBasicInformationOfMaterialAssociatesAndJointVenturesDetail
1243 Summarized financial information of investments in associates and joint ventures [table] Table

*

*

hnp:SummarizedFinancialInformationOfInvestmentsInAssociatesAndJointVenturesTable
1244 Investments accounted for using equity method [axis] Axis hnp:InvestmentsAccountedForUsingEquityMethodAxis
1245 Investments accounted for using equity method [member] Member ifrs-full:InvestmentsAccountedForUsingEquityMethodMember
1246 Associates [member] Member ifrs-full:AssociatesMember
1247 SECL [member] Member hnp:ShenzhenEnergyCorporationLimitedMember
1248 Hebei Hanfeng Power Generation Limited Liability Company ("Hanfeng Power") [member] Member hnp:HebeiHanfengPowerGenerationLimitedLiabilityCompanyMember
1249 Huaneng Finance [member] Member hnp:ChinaHuanengFinanceCorporationLimitedMember
1250 Huaneng Sichuan Hydropower Co., Ltd. ("Sichuan Hydropower") [member] Member hnp:HuanengSichuanHydropowerCoLtdMember
1251 China Huaneng Group Fuel Co., Ltd. ("Huaneng Group Fuel Company") [member] Member hnp:ChinaHuanengGroupFuelCoLtdMember
1252 Hainan Nuclear Power Limited Liability Company ("Hainan Nuclear") [member] Member hnp:HainanNuclearPowerCoLtdMember
1253 Joint ventures [member] Member ifrs-full:JointVenturesMember
1254 Shanghai Time Shipping Co., Ltd. ("Shanghai Time Shipping") [member] Member hnp:ShanghaiTimeShippingCoLtdMember
1255 Jiangsu Nantong Power Generation Co., Ltd. ("Jiangsu Nantong Power") [member] Member hnp:JiangsuNantongPowerGenerationCoLtdMember
1256 Summarized financial information of investments in associates and joint ventures [line items] LineItems hnp:SummarizedFinancialInformationOfInvestmentsInAssociatesAndJointVenturesLineItems
1257 Country of incorporation Concept (Text/String) For Period ifrs-full:CountryOfIncorporation
1258 Registered capital Concept (Monetary) As Of Credit hnp:RegisteredCapital
1259 Business nature and scope of operation Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities
1260 Percentage of equity interest held, Direct Concept (Percent) For Period hnp:ProportionOfOwnershipInterestInInvestmentsAccountedForUsingEquityMethodDirectly
1261 Percentage of equity interest held, Indirect Concept (Percent) For Period hnp:ProportionOfOwnershipInterestInInvestmentsAccountedForUsingEquityMethodIndirectly
1262 The fair value of the Company's shares Concept (Monetary) As Of Debit ifrs-full:FairValueOfInvestmentsInAssociatesWherePriceQuotationsPublished
1263 40802 - Disclosure - Investments in associates and joint ventures (Summarized financial information of material associates) (Detail) Network

*

*

http://www.hpi.com.cn/role/InvestmentsInAssociatesAndJointVenturesSummarizedFinancialInformationOfMaterialAssociatesDetail
1264 Summarized financial information of investments in associates and joint ventures [table] Table

*

*

hnp:SummarizedFinancialInformationOfInvestmentsInAssociatesAndJointVenturesTable
1265 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1266 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1267 Sichuan Hydropower [member] Member hnp:HuanengSichuanHydropowerCoLtdMember
1268 SECL [member] Member hnp:ShenzhenEnergyCorporationLimitedMember
1269 Huaneng Finance [member] Member hnp:ChinaHuanengFinanceCorporationLimitedMember
1270 Hanfeng Power [member] Member hnp:HebeiHanfengPowerGenerationLimitedLiabilityCompanyMember
1271 Huaneng Group Fuel Company [member] Member hnp:ChinaHuanengGroupFuelCoLtdMember
1272 Hainan Nuclear [member] Member hnp:HainanNuclearPowerCoLtdMember
1273 Summarized financial information of investments in associates and joint ventures [line items] LineItems hnp:SummarizedFinancialInformationOfInvestmentsInAssociatesAndJointVenturesLineItems
1274 Gross amounts of joint ventures' Abstract hnp:GrossAmountsOfAssociatesAbstract
1275 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
1276 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
1277 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
1278 Non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
1279 Equity Concept (Monetary) As Of Credit ifrs-full:Equity
1280 Equity attributable to shareholders Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
1281 Non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
1282 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
1283 Profit/(loss) from continuing operations attributable to shareholders Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
1284 Other comprehensive (loss)/income attributable to shareholders Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeAttributableToOwnersOfParent
1285 Total comprehensive income/(loss) attributable to shareholders Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
1286 Dividend received from the associates Concept (Monetary) For Period Debit ifrs-full:DividendsReceivedFromAssociatesClassifiedAsInvestingActivities
1287 Reconciled to the interests in the associates Abstract hnp:ReconciledToInterestsInAssociatesAbstract
1288 Gross amounts of net assets attributable to shareholders of the associate Concept (Monetary) As Of Debit hnp:NetAssetsLiabilitiesAttributableToOwnersOfParent
1289 The Company's effective interest Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
1290 The Company's share of net assets attributable to shareholders of the associate Concept (Monetary) As Of Debit hnp:CompanysShareOfNetAssetsAttributableToShareholdersOfAssociatesAndJointVentures
1291 Impact of adjustments Concept (Monetary) As Of Debit hnp:ImpactOfAdjustmentsToCompanysShareOfNetAssets
1292 Carrying amount in the consolidated financial statements Concept (Monetary) As Of Debit ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
1293 40803 - Disclosure - Investments in associates and joint ventures (Summarized financial information of material joint ventures) (Detail) Network

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1294 Summarized financial information of investments in associates and joint ventures [table] Table

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hnp:SummarizedFinancialInformationOfInvestmentsInAssociatesAndJointVenturesTable
1295 Joint ventures [axis] Axis ifrs-full:JointVenturesAxis
1296 Entity's total for joint ventures [member] Member ifrs-full:EntitysTotalForJointVenturesMember
1297 Shanghai Time Shipping [member] Member hnp:ShanghaiTimeShippingCoLtdMember
1298 Jiangsu Nantong Power [member] Member hnp:JiangsuNantongPowerGenerationCoLtdMember
1299 Summarized financial information of investments in associates and joint ventures [line items] LineItems hnp:SummarizedFinancialInformationOfInvestmentsInAssociatesAndJointVenturesLineItems
1300 Gross amounts of joint ventures' Abstract hnp:GrossAmountsOfJointVenturesAbstract
1301 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
1302 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
1303 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
1304 Non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
1305 Equity Concept (Monetary) As Of Credit ifrs-full:Equity
1306 Included in the above assets and liabilities: Abstract hnp:IncludedInAboveAssetsAndLiabilitiesAbstract
1307 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
1308 Current financial liabilities (excluding trade and other payables and provisions) Concept (Monetary) As Of Credit hnp:CurrentFinancialLiabilitiesExcludingTradeAndOtherPayablesAndProvisions
1309 Non-current financial liabilities (excluding trade and other payables and provisions) Concept (Monetary) As Of Credit hnp:NonCurrentFinancialLiabilitiesExcludingTradeAndOtherPayablesAndProvisions
1310 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
1311 Profit/(loss) from continuing operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromContinuingOperations
1312 Other comprehensive income Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeAttributableToOwnersOfParent
1313 Total comprehensive income/(loss) Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
1314 Dividend received in cash from the joint ventures Concept (Monetary) For Period Debit ifrs-full:DividendsReceivedFromJointVenturesClassifiedAsInvestingActivities
1315 Included in the above profit/(loss): Abstract hnp:IncludedInAboveProfitAbstract
1316 Depreciation and amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
1317 Interest income Concept (Monetary) For Period Credit ifrs-full:RevenueFromInterest
1318 Interest expense Concept (Monetary) For Period Debit ifrs-full:InterestExpense
1319 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
1320 Reconciled to the interests in the joint ventures: Abstract hnp:ReconciledToInterestsInJointVenturesAbstract
1321 Gross amounts of net assets Concept (Monetary) As Of Debit hnp:NetAssetsLiabilitiesAttributableToOwnersOfParent
1322 The Company and its subsidiaries' effective interest Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInJointVenture
1323 The Company and its subsidiaries' share of net assets Concept (Monetary) As Of Debit hnp:CompanysShareOfNetAssetsAttributableToShareholdersOfAssociatesAndJointVentures
1324 Impact of adjustments Concept (Monetary) As Of Debit hnp:ImpactOfAdjustmentsToCompanysShareOfNetAssets
1325 Carrying amount in the consolidated financial statements Concept (Monetary) As Of Debit ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
1326 40804 - Disclosure - Investments in associates and joint ventures (Disclosure of aggregated information of individually immaterial associates and joint ventures) (Detail) Network

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http://www.hpi.com.cn/role/InvestmentsInAssociatesAndJointVenturesDisclosureOfAggregatedInformationOfIndividuallyImmaterialAssociatesAndJointVenturesDetail
1327 Summarized financial information of investments in associates and joint ventures [table] Table

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hnp:SummarizedFinancialInformationOfInvestmentsInAssociatesAndJointVenturesTable
1328 Investments accounted for using equity method [axis] Axis hnp:InvestmentsAccountedForUsingEquityMethodAxis
1329 Investments accounted for using equity method [member] Member ifrs-full:InvestmentsAccountedForUsingEquityMethodMember
1330 Individually immaterial associates and joint ventures [member] Member hnp:IndividuallyImmaterialAssociatesAndJointVenturesMember
1331 Summarized financial information of investments in associates and joint ventures [line items] LineItems hnp:SummarizedFinancialInformationOfInvestmentsInAssociatesAndJointVenturesLineItems
1332 Aggregate carrying amount of individually immaterial associates and joint ventures in the consolidated financial statements Concept (Monetary) As Of Debit ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
1333 Aggregate amounts of the Company and its subsidiaries' share of those associates and joint ventures Abstract hnp:AggregateAmountsOfCompanyAndItsSubsidiariesShareOfThoseAssociatesAndJointVenturesAbstract
1334 Profit from continuing operations Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfContinuingOperationsOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1335 Total comprehensive income Concept (Monetary) For Period Credit ifrs-full:ShareOfTotalComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1336 Unrecognised further losses Concept (Monetary) As Of Credit hnp:CumulativeUnrecognisedShareOfLossesOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1337 40900 - Disclosure - Investments in subsidiaries (Subsidiaries acquired through establishment or investment) (Detail) Network

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http://www.hpi.com.cn/role/InvestmentsInSubsidiariesSubsidiariesAcquiredThroughEstablishmentOrInvestmentDetail
1338 Disclosure of subsidiaries [table] Table

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*

ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
1339 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1340 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1341 Huaneng International Power Fuel Limited Liability Company [member] Member hnp:HuanengInternationalPowerFuelLimitedLiabilityCompanyMember
1342 Huaneng Shanghai Shidongkou Power Generation Limited Liability Company ("Shidongkou Power") [member] Member hnp:HuanengShanghaiShidongkouPowerGenerationLimitedLiabilityCompanyMember
1343 Huaneng Nantong Power Generation Limited Liability Company [member] Member hnp:HuanengNantongPowerGenerationLimitedLiabilityCompanyMember
1344 Huaneng Yingkou Co-generation Limited Liability Company [member] Member hnp:HuanengYingkouCoGenerationLimitedLiabilityCompanyMember
1345 Huaneng Hunan Xiangqi Hydropower Co., Ltd. [member] Member hnp:HuanengHunanXiangqiHydropowerCoLtdMember
1346 Huaneng Zuoquan Coal-fired Power Generation Limited Liability Company [member] Member hnp:HuanengZuoquanCoalFiredPowerGenerationLimitedLiabilityCompanyMember
1347 Huaneng Kangbao Wind Power Utilization Limited Liability Company [member] Member hnp:HuanengKangbaoWindPowerUtilizationLimitedLiabilityCompanyMember
1348 Huaneng Jiuquan Wind Power Generation Co., Ltd. ("Jiuquan Wind Power") [member] Member hnp:HuanengJiuquanWindPowerGenerationCoLtdMember
1349 Huaneng Rudong Wind Power Generation Co., Ltd. [member] Member hnp:HuanengRudongWindPowerGenerationCoLtdMember
1350 Huaneng Guangdong Haimen Port Limited Liability Company [member] Member hnp:HuanengGuangdongHaimenPortLimitedLiabilityCompanyMember
1351 Huaneng Taicang Port Limited Liability Company [member] Member hnp:HuanengTaicangPortLimitedLiabilityCompanyMember
1352 Huaneng Taicang Power Generation Co., Ltd. [member] Member hnp:HuanengTaicangPowerGenerationCoLtdMember
1353 Huaneng Huaiyin II Power Generation Limited Company [member] Member hnp:HuanengHuaiyinIiPowerLimitedCompanyMember
1354 Huaneng Xindian Power Generation Co., Ltd. [member] Member hnp:HuanengXindianPowerGenerationCoLtdMember
1355 Huaneng Shanghai Combined Cycle Power Limited Liability Company [member] Member hnp:HuanengShanghaiCombinedCyclePowerLimitedLiabilityCompanyMember
1356 Huaneng Yumen Wind Power Generation Co., Ltd. [member] Member hnp:HuanengYumenWindPowerGenerationCoLtdMember
1357 Huaneng Qingdao Co-generation Limited Company [member] Member hnp:HuanengQingdaoCoGenerationLimitedCompanyMember
1358 Huaneng Tongxiang Combined Cycle Co-generation Co., Ltd. [member] Member hnp:HuanengTongxiangCombinedCycleCoGenerationCoLtdMember
1359 Huaneng Shantou Haimen Power Generation Limited Liability Company [member] Member hnp:HuanengShantouHaimenPowerGenerationLimitedLiabilityCompanyMember
1360 Huaneng Chongqing Liangjiang Power Generation Limited Liability Company ("Liangjiang Power") [member] Member hnp:HuanengChongqingLiangjiangPowerGenerationLimitedLiabilityCompanyMember
1361 Chongqing Huaqing Energy Co., Ltd. ("Huaqing Energy") [member] Member hnp:ChongqingHuaqingEnergyCoLtdMember
1362 Huaneng Yunnan Fuyuan Wind Power Generation Co., Ltd. [member] Member hnp:HuanengYunnanFuyuanWindPowerGenerationCoLtdMember
1363 Huaneng Guizhou Panzhou State City Wind Power Co., Ltd. [member] Member hnp:HuanengGuizhouPanzhouStateCityWindPowerCoLtdMember
1364 Huaneng Jiangxi Clean Energy Limited Liability Company [member] Member hnp:HuanengJiangxiCleanEnergyLimitedLiabilityCompanyMember
1365 Huaneng Nanjing Combined Cycle Co-generation Co., Ltd. ("Nanjing Combined Cycle Co-generation") [member] Member hnp:HuanengNanjingCombinedCycleCoGenerationCoLtdMember
1366 Huaneng Hunan Subaoding Wind Power Generation Co., Ltd. [member] Member hnp:HuanengHunanSubaodingWindPowerGenerationCoLtdMember
1367 Huaneng Suixian Jieshan Wind Power Generation Co., Ltd. [member] Member hnp:HuanengSuixianJieshanWindPowerGenerationCoLtdMember
1368 Huaneng Taiyuan Dongshan Combined Cycle Co-generation Co., Ltd. [member] Member hnp:HuanengTaiyuanDongshanCombinedCycleCoGenerationCoLtdMember
1369 Huaneng Xuzhou Tongshan Wind Power Generation Co., Ltd. ("Tongshan Wind Power") [member] Member hnp:HuanengXuzhouTongshanWindPowerGenerationCoLtdMember
1370 Huaneng Nanjing Co-generation Co., Ltd. [member] Member hnp:HuanengNanjingCoGenerationCoLtdMember
1371 Huaneng Hunan Guidong Wind Power Generation Co., Ltd. [member] Member hnp:HuanengHunanGuidongWindPowerGenerationCoLtdMember
1372 Huaneng Nanjing Luhe Wind Power Generation Co., Ltd. [member] Member hnp:HuanengNanjingLuheWindPowerGenerationCoLtdMember
1373 Huaneng Luoyuan Power Generation Limited Liability Company [member] Member hnp:HuanengLuoyuanPowerGenerationLimitedLiabilityCompanyMember
1374 Huaneng Lingang (Tianjin) Gas Co-generation Co., Ltd. [member] Member hnp:HuanengLingangTianjinGasCoGenerationCoLtdMember
1375 Huaneng Lingang (Tianjin) Heat Co-generation Co., Ltd. [member] Member hnp:HuanengLingangTianjinHeatCoGenerationCoLtdMember
1376 Huaneng Anhui Huaining Wind Power Generation Co., Ltd. [member] Member hnp:HuanengAnhuiHuainingWindPowerGenerationCoLtdMember
1377 Huaneng Mianchi Co-generation Limited Liability Company [member] Member hnp:HuanengMianchiCoGenerationLimitedLiabilityCompanyMember
1378 Huaneng Yingkou Xianrendao Co-generation Co., Ltd. [member] Member hnp:HuanengYingkouXianrendaoCoGenerationCoLtdMember
1379 Huaneng Nanjing Xingang Comprehensive Energy Co., Ltd. [member] Member hnp:HuanengNanjingXingangComprehensiveEnergyCoLtdMember
1380 Huaneng Changxing Photovoltaic Power Generation Limited Liability Company ("Changxing Photovoltaic Power") [member] Member hnp:HuanengChangxingPhotovoltaicPowerGenerationLimitedLiabilityCompanyMember
1381 Huaneng Rudong Baxianjiao Offshore Wind Power Generation Co., Ltd. [member] Member hnp:HuanengRudongBaxianjiaoOffshoreWindPowerGenerationCoLtdMember
1382 Huaneng Guilin Gas Distributed Energy Co., Ltd. [member] Member hnp:HuanengGuilinGasDistributedEnergyCoLtdMember
1383 Huaneng (Dalian) Co-generation Co., Ltd. [member] Member hnp:HuanengDalianCoGenerationCoLtdMember
1384 Huaneng Zhongxiang Wind Power Generation Co., Ltd. [member] Member hnp:HuanengZhongxiangWindPowerGenerationCoLtdMember
1385 Huaneng Guanyun Co-generation Co., Ltd. [member] Member hnp:HuanengGuanyunCoGenerationCoLtdMember
1386 Huaneng International Power Hong Kong Limited Company [member] Member hnp:HuanengInternationalPowerHongKongLimitedCompanyMember
1387 Tuas Power Generation Pte. Ltd. ("TPG") [member] Member hnp:TuasPowerGenerationPteLtdMember
1388 TP Utilities Pte. Ltd. ("TPU") [member] Member hnp:TpUtilitiesPteLtdMember
1389 TP-STM Water Resources Pte. Ltd. [member] Member hnp:TpStmWaterResourcesPteLtdMember
1390 TP-STM Water Services Pte. Ltd. [member] Member hnp:TpStmWaterServicesPteLtdMember
1391 Huaneng Shanxi Taihang Power Generation Limited Liability Company [member] Member hnp:HuanengShanxiTaihangPowerGenerationLimitedLiabilityCompanyMember
1392 Huaneng Mianchi Clean Energy Limited Liability Company [member] Member hnp:HuanengMianchiCleanEnergyLimitedLiabilityCompanyMember
1393 Huaneng Zhuolu Clean Energy Limited Liability Company [member] Member hnp:HuanengZhuoluCleanEnergyLimitedLiabilityCompanyMember
1394 Huaneng Tongwei Wind Power Generation Limited Liability Company [member] Member hnp:HuanengTongweiWindPowerGenerationLimitedLiabilityCompanyMember
1395 Huaneng Yizheng Wind Power Generation Limited Liability Company [member] Member hnp:HuanengYizhengWindPowerGenerationLimitedLiabilityCompanyMember
1396 Huaneng Yancheng Dafeng New Energy Power Generation Limited Liability Company [member] Member hnp:HuanengYanchengDafengNewEnergyPowerGenerationLimitedLiabilityCompanyMember
1397 Huaneng Shanyin Power Generation Limited Liability Company [member] Member hnp:HuanengShanyinPowerGenerationLimitedLiabilityCompanyMember
1398 Huaneng Wafangdian Wind Power Generation Co., Ltd. [member] Member hnp:HuanengWafangdianWindPowerGenerationCoLtdMember
1399 Huaneng Jiangsu Energy Sales Limited Liability Company [member] Member hnp:HuanengJiangsuEnergySalesLimitedLiabilityCompanyMember
1400 Huaneng Liaoning Energy Sales Limited Liability Company [member] Member hnp:HuanengLiaoningEnergySalesLimitedLiabilityCompanyMember
1401 Huaneng Guangdong Energy Sales Limited Liability Company [member] Member hnp:HuanengGuangdongEnergySalesLimitedLiabilityCompanyMember
1402 Huaneng Suizhou Power Generation Limited Liability Company [member] Member hnp:HuanengSuizhouPowerGenerationLimitedLiabilityCompanyMember
1403 Huaneng Changle Photovoltaic Power Generation Limited Liability Company [member] Member hnp:HuanengChanglePhotovoltaicPowerGenerationLimitedLiabilityCompanyMember
1404 Huaneng Longyan Wind Power Generation Limited Liability Company [member] Member hnp:HuanengLongyanWindPowerGenerationLimitedLiabilityCompanyMember
1405 Huaneng Dandong Photovoltaic Power Generation Limited Liability Company [member] Member hnp:HuanengDandongPhotovoltaicPowerGenerationLimitedLiabilityCompanyMember
1406 Huaneng Dongguan Combined Cycle Co-generation Limited Liability Company [member] Member hnp:HuanengDongguanCombinedCycleCoGenerationLimitedLiabilityCompanyMember
1407 Huaneng Chongqing Fengjie Wind Power Generation Limited Liability Company [member] Member hnp:HuanengChongqingFengjieWindPowerGenerationLimitedLiabilityCompanyMember
1408 Huaneng Jingxing Photovoltaic Power Generation Limited Liability Company [member] Member hnp:HuanengJingxingPhotovoltaicPowerGenerationLimitedLiabilityCompanyMember
1409 Huaneng Shanxi Energy Sales Limited Liability Company [member] Member hnp:HuanengShanxiEnergySalesLimitedLiabilityCompanyMember
1410 Huaneng Chongqing Energy Sales Limited Liability Company [member] Member hnp:HuanengChongqingEnergySalesLimitedLiabilityCompanyMember
1411 Huaneng Chongqing Luohuang Energy Sales Limited Liability Company [member] Member hnp:HuanengChongqingLuohuangEnergySalesLimitedLiabilityCompanyMember
1412 Huaneng Chongqing Tongliang Energy Sales Limited Liability Company [member] Member hnp:HuanengChongqingTongliangEnergySalesLimitedLiabilityCompanyMember
1413 Huaneng Hunan Energy Sales Limited Liability Company [member] Member hnp:HuanengHunanEnergySalesLimitedLiabilityCompanyMember
1414 Huaneng Jiangxi Energy Sales Limited Liability Company [member] Member hnp:HuanengJiangxiEnergySalesLimitedLiabilityCompanyMember
1415 Huaneng Hebei Energy Sales Limited Liability Company [member] Member hnp:HuanengHebeiEnergySalesLimitedLiabilityCompanyMember
1416 Huaneng Henan Energy Sales Limited Liability Company [member] Member hnp:HuanengHenanEnergySalesLimitedLiabilityCompanyMember
1417 Huaneng Handan Heating Limited Liability Company [member] Member hnp:HuanengHandanHeatingLimitedLiabilityCompanyMember
1418 Huaneng (Huzhou Development Zone) Photovoltaic Power Generation Limited Liability Company [member] Member hnp:HuanengHuzhouDevelopmentZonePhotovoltaicPowerGenerationLimitedLiabilityCompanyMember
1419 Huaneng Fujian Energy Sales Limited Liability Company [member] Member hnp:HuanengFujianEnergySalesLimitedLiabilityCompanyMember
1420 Huaneng Hubei Energy Sales Limited Liability Company [member] Member hnp:HuanengHubeiEnergySalesLimitedLiabilityCompanyMember
1421 Huaneng (Sanming) Clean Energy Limited Liability Company [member] Member hnp:HuanengSanmingCleanEnergyLimitedLiabilityCompanyMember
1422 Huaneng Yueyang Xingang Photovoltaic Power Generation Limited Liability Company [member] Member hnp:HuanengYueyangXingangPhotovoltaicPowerGenerationLimitedLiabilityCompanyMember
1423 Huaneng Shanghai Energy Sales Limited Liability Company [member] Member hnp:HuanengShanghaiEnergySalesLimitedLiabilityCompanyMember
1424 Huaneng Anhui Energy Sales Limited Liability Company [member] Member hnp:HuanengAnhuiEnergySalesLimitedLiabilityCompanyMember
1425 Huaneng (Shanghai) Power Maintenance Limited Liability Company [member] Member hnp:HuanengShanghaiPowerMaintenanceLimitedLiabilityCompanyMember
1426 Huaneng Guanyun Clean Energy Power Limited Liability Company [member] Member hnp:HuanengGuanyunCleanEnergyPowerLimitedLiabilityCompanyMember
1427 Huaneng Jianchang Photovoltaic Power Generation Limited Liability Company [member] Member hnp:HuanengJianchangPhotovoltaicPowerGenerationLimitedLiabilityCompanyMember
1428 Huaneng Chaoyang Photovoltaic Power Generation Limited Liability Company [member] Member hnp:HuanengChaoyangPhotovoltaicPowerGenerationLimitedLiabilityCompanyMember
1429 Huaneng (Luoyuan) Port Limited Company [member] Member hnp:HuanengLuoyuanPortLimitedCompanyMember
1430 Huaneng Shijiazhuang Energy Limited Liability Company [member] Member hnp:HuanengShijiazhuangEnergyLimitedLiabilityCompanyMember
1431 Huaneng Jiangyin Combined Cycle Co-generation Limited Liability Company [member] Member hnp:HuanengJiangyinCombinedCycleCoGenerationLimitedLiabilityCompanyMember
1432 Huaneng Anyang Energy Limited Liability Company [member] Member hnp:HuanengAnyangEnergyLimitedLiabilityCompanyMember
1433 Huaneng Shanxi Comprehensive Energy Limited Liability Company ("Shanxi Comprehensive Energy") [member] Member hnp:HuanengShanxiComprehensiveEnergyLimitedLiabilityCompanyMember
1434 Huaneng Zhanhua Photovoltaic Power Generation Limited Company ("Zhanhua Photovoltaic Company") [member] Member hnp:HuanengZhanhuaPhotovoltaicPowerGenerationLimitedCompanyMember
1435 Huaneng Weishan New Energy Limited Company ("Weishan New Energy") [member] Member hnp:HuanengWeishanNewEnergyLimitedCompanyMember
1436 Huaneng Ruyi (Helan) New Energy Limited Company ("Helan New Energy") [member] Member hnp:HuanengRuyiHelanNewEnergyLimitedCompanyMember
1437 Huaneng Dezhou New Energy Limited Company [member] Member hnp:HuanengDezhouNewEnergyLimitedCompanyMember
1438 Zhaodong Huaneng Dechang Solar Power Generation Limited Company [member] Member hnp:ZhaodongHuanengDechangSolarPowerGenerationLimitedCompanyMember
1439 Daqing Huaneng Shuangyu Solar Power Generation Limited Company [member] Member hnp:DaqingHuanengShuangyuSolarPowerGenerationLimitedCompanyMember
1440 Huaneng Mingguang Wind Power Generation Limited Liability Company [member] Member hnp:HuanengMingguangWindPowerGenerationLimitedLiabilityCompanyMember
1441 Huaneng Guangxi Energy Sales Limited Liability Company [member] Member hnp:HuanengGuangxiEnergySalesLimitedLiabilityCompanyMember
1442 Huaneng Ruzhou Clean Energy Limited Liability Company ("Ruzhou Clean Energy") [member] Member hnp:HuanengRuzhouCleanEnergyLimitedLiabilityCompanyMember
1443 Huaneng Hunan Lianping Wind Power Generation Limited Liability Company [member] Member hnp:HuanengHunanLianpingWindPowerGenerationLimitedLiabilityCompanyMember
1444 Huaneng Abagaqi Clean Energy Limited Liability Company [member] Member hnp:HuanengAbagaqiCleanEnergyLimitedLiabilityCompanyMember
1445 Huaneng Jiashan Photovoltaic Power Generation Limited Liability Company [member] Member hnp:HuanengJiashanPhotovoltaicPowerGenerationLimitedLiabilityCompanyMember
1446 Huaneng Zhejiang Energy Sales Limited Liability Company [member] Member hnp:HuanengZhejiangEnergySalesLimitedLiabilityCompanyMember
1447 Huaneng Guangdong Shantou Power Generation Limited Liability Company [member] Member hnp:HuanengGuangdongShantouPowerGenerationLimitedLiabilityCompanyMember
1448 Huaneng Shantou Photovoltaic Power Generation Limited Liability Company [member] Member hnp:HuanengShantouPhotovoltaicPowerGenerationLimitedLiabilityCompanyMember
1449 Huaneng Guigang Clean Energy Limited Liability Company [member] Member hnp:HuanengGuigangCleanEnergyLimitedLiabilityCompanyMember
1450 Huaneng Changxing Jiapu Photovoltaic Power Generation Limited Liability Company [member] Member hnp:HuanengChangxingJiapuPhotovoltaicPowerGenerationLimitedLiabilityCompanyMember
1451 Huaneng Hainan Energy Sales Limited Liability Company [member] Member hnp:HuanengHainanEnergySalesLimitedLiabilityCompanyMember
1452 Huaneng Yangpu Co-generation Limited Company [member] Member hnp:HuanengYangpuCoGenerationLimitedCompanyMember
1453 Huaneng Zhejiang Pinghu Offshore Wind Power Generation Co., Ltd. [member] Member hnp:HuanengZhejiangPinghuOffshoreWindPowerGenerationCoLtdMember
1454 Huaneng Liaoning Clean Energy Limited Liability Company ("Liaoning Clean Energy") [member] Member hnp:HuanengLiaoningCleanEnergyLimitedLiabilityCompanyMember
1455 Jiangsu Huaneng Zhongyang New Energy Power Generation Co., Ltd. [member] Member hnp:JiangsuHuanengZhongyangNewEnergyPowerGenerationCoLtdMember
1456 Huaneng Henan Puyang Clean Energy Limited Liability Company [member] Member hnp:HuanengHenanPuyangCleanEnergyLimitedLiabilityCompanyMember
1457 Huaneng Guizhou Energy Sales Co., Ltd. [member] Member hnp:HuanengGuizhouEnergySalesCoLtdMember
1458 Huaneng Guangdong Shantou Offshore Wind Power Generation Co., Ltd. [member] Member hnp:HuanengGuangdongShantouOffshoreWindPowerGenerationCoLtdMember
1459 Jiyuan Huaneng Energy Sales Co., Ltd. [member] Member hnp:JiyuanHuanengEnergySalesCoLtdMember
1460 Huaneng Zhenlai Photovoltaic Power Generation Co., Ltd. ("Zhenlai Photovoltaic Power") [member] Member hnp:HuanengZhenlaiPhotovoltaicPowerGenerationCoLtdMember
1461 Huaneng Yushe Poverty Relief Energy Co., Ltd. [member] Member hnp:HuanengYushePovertyReliefEnergyCoLtdMember
1462 Huaneng Anhui Mengcheng Wind Power Co., Ltd. [member] Member hnp:HuanengAnhuiMengchengWindPowerCoLtdMember
1463 Huaneng Anshun Comprehensive Energy Co., Ltd. [member] Member hnp:HuanengAnshunComprehensiveEnergyCoLtdMember
1464 Huaneng Shengdong Rudong Offshore Wind Power Co., Ltd. ("Huaneng Shengdong Rudong") [member] Member hnp:HuanengShengdongRudongOffshoreWindPowerCoLtdMember
1465 Huaneng Zhejiang Cangnan Offshore Wind Power Co., Ltd. [member] Member hnp:HuanengZhejiangCangnanOffshoreWindPowerCoLtdMember
1466 Huaneng Zhejiang Ruian Offshore Wind Power Co., Ltd. [member] Member hnp:HuanengZhejiangRuianOffshoreWindPowerCoLtdMember
1467 Shengdong Rudong Offshore Wind Power Co., Ltd. ("Shengdong Rudong Offshore Wind Power") [member] Member hnp:ShengdongRudongOffshoreWindPowerCoLtdMember
1468 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
1469 Country of incorporation Concept (Text/String) For Period ifrs-full:CountryOfIncorporationOrResidenceOfSubsidiary
1470 Type of interest held Concept (Text/String) For Period hnp:TypeOfInterestHeld
1471 Registered capital Concept (Monetary) As Of Credit hnp:RegisteredCapital
1472 Registered capital Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
1473 Business nature and scope of operations Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities
1474 Percentage of equity interest held, Interest Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
1475 Percentage of equity interest held, Voting Concept (Percent) For Period ifrs-full:ProportionOfVotingPowerHeldInSubsidiary
1476 40901 - Disclosure - Investments in subsidiaries (Subsidiaries acquired from business combinations under common control) (Detail) Network

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http://www.hpi.com.cn/role/InvestmentsInSubsidiariesSubsidiariesAcquiredFromBusinessCombinationsUnderCommonControlDetail
1477 Disclosure of subsidiaries [table] Table

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*

ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
1478 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1479 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1480 Huaneng (Suzhou Industrial Park) Power Generation Co., Ltd. [member] Member hnp:HuanengSuzhouIndustrialParkPowerGenerationCoLtdMember
1481 Huaneng Qinbei Power Generation Co., Ltd. ("Qinbei Power") [member] Member hnp:HuanengQinbeiPowerGenerationCoLtdMember
1482 Huaneng Yushe Power Generation Co., Ltd. [member] Member hnp:HuanengYushePowerGenerationCoLtdMember
1483 Huaneng Hunan Yueyang Power Generation Limited Liability Company [member] Member hnp:HuanengHunanYueyangPowerGenerationLimitedLiabilityCompanyMember
1484 Huaneng Chongqing Luohuang Power Generation Limited Liability Company ("Luohuang Power") [member] Member hnp:LuohuangPowerCompanyMember
1485 Huaneng Pingliang Power Generation Co., Ltd. [member] Member hnp:HuanengPingliangPowerGenerationCoLtdMember
1486 Huaneng Nanjing Jinling Power Generation Co., Ltd. [member] Member hnp:JinlingPowerCompanyMember
1487 Huaneng Qidong Wind Power Generation Co., Ltd. [member] Member hnp:HuanengQidongWindPowerGenerationCoLtdMember
1488 Tianjin Huaneng Yangliuqing Co-generation Limited Liability Company ("Yangliuqing Co-generation") [member] Member hnp:TianjinHuanengYangliuqingCoGenerationLimitedLiabilityCompanyMember
1489 Huaneng Beijing Co-generation Limited Liability Company ("Beijing Co-generation") [member] Member hnp:HuanengBeijingCoGenerationLimitedLiabilityCompanyMember
1490 Huaneng Wuhan Power Generation Co., Ltd. ("Wuhan Power") [member] Member hnp:HuanengWuhanPowerGenerationCoLtdMember
1491 Huaneng Anyuan Power Generation Co., Ltd. ("Anyuan Power") [member] Member hnp:HuanengAnyuanPowerGenerationCoLtdMember
1492 Huaneng Hualiangting Hydropower Co., Ltd. ("Hualiangting Hydropower") [member] Member hnp:HuanengHualiangtingHydropowerCoLtdMember
1493 Huaneng Chaohu Power Generation Co., Ltd. ("Chaohu Power") [member] Member hnp:HuanengChaohuPowerGenerationCoLtdMember
1494 Huaneng Jingmen Thermal Power Co., Ltd. ("Jingmen Thermal Power") [member] Member hnp:HuanengJingmenThermalPowerCoLtdMember
1495 Enshi Qingjiang Dalongtan Hydropower Development Co., Ltd. ("Dalongtan Hydropower") [member] Member hnp:EnshiQingjiangDalongtanHydropowerDevelopmentCoLtdMember
1496 Huaneng Suzhou Thermal Power Co., Ltd. ("Suzhou Thermal Power") [member] Member hnp:HuanengSuzhouThermalPowerCoLtdMember
1497 Huaneng Hainan Power Generation Limited Company ("Hainan Power") [member] Member hnp:HuanengHainanPowerIncMember
1498 Huaneng Ruijin Power Generation Co., Ltd. ("Ruijin Power Generation") [member] Member hnp:HuanengRuijinPowerGenerationCoLtdMember
1499 Huaneng Yingcheng Thermal Power Co., Ltd. ("Yingcheng Thermal Power") [member] Member hnp:HuanengYingchengThermalPowerCoLtdMember
1500 Huaneng Heilongjiang Power Generation Limited Company ("Heilongjiang Power") [member] Member hnp:HuanengHeilongjiangPowerGenerationLimitedCompanyMember
1501 Huaneng Hegang Power Generation Limited Company ("Hegang Power") [member] Member hnp:HuanengHegangPowerGenerationLimitedCompanyMember
1502 Huaneng Xinhua Power Generation Limited Liability Company ("Xinhua Power") [member] Member hnp:HuanengXinhuaPowerGenerationLimitedLiabilityCompanyMember
1503 Huaneng Tongjiang Wind Power Generation Limited Company ("Tongjiang Wind Power") [member] Member hnp:HuanengTongjiangWindPowerGenerationLimitedCompanyMember
1504 Huaneng Daqing Thermal Power Limited Company ("Daqing Thermal Power") [member] Member hnp:HuanengDaqingThermalPowerLimitedCompanyMember
1505 Daqing Lvyuan Wind Power Generation Limited Company ("Lvyuan Wind Power") [member] Member hnp:DaqingLvyuanWindPowerGenerationLimitedCompanyMember
1506 Huaneng Yichun Thermal Power Limited Company ("Yichun Thermal Power") [member] Member hnp:HuanengYichunThermalPowerLimitedCompanyMember
1507 Huaneng Heilongjiang Energy Sales Limited Company ("Heilongjiang Energy Sales") [member] Member hnp:HuanengHeilongjiangEnergySalesLimitedCompanyMember
1508 Zhaodong Huaneng Thermal Power Limited Company ("Zhaodong Thermal Power") [member] Member hnp:ZhaodongHuanengThermalPowerLimitedCompanyMember
1509 Huaneng Jilin Power Generation Limited Company ("Jilin Power") [member] Member hnp:HuanengJilinPowerGenerationLimitedCompanyMember
1510 Huaneng Linjiang Jubao Hydropower Limited Company ("Jubao Hydropower") [member] Member hnp:HuanengLinjiangJubaoHydropowerLimitedCompanyMember
1511 Huaneng Jilin Energy Sales Limited Company ("Jilin Energy Sales") [member] Member hnp:HuanengJilinEnergySalesLimitedCompanyMember
1512 Shandong Power [member] Member hnp:HuanengShandongPowerGenerationLimitedCompanyMember
1513 Huaneng Jining New Energy Limited Company ("Jining New Energy") [member] Member hnp:HuanengJiningNewEnergyLimitedCompanyMember
1514 Huaneng Zibo Boshan Photovoltaic Power Limited Company ("Zibo Photovoltaic") [member] Member hnp:HuanengZiboBoshanPhotovoltaicPowerLimitedCompanyMember
1515 Huaneng Rizhao Thermal Power Limited Company ("Rizhao Thermal Power") [member] Member hnp:HuanengRizhaoThermalPowerLimitedCompanyMember
1516 Huaneng Laiwu New Energy Limited Company ("Laiwu New Energy") [member] Member hnp:HuanengLaiwuNewEnergyLimitedCompanyMember
1517 Huaneng Shandong Sishui New Energy Limited Company ("Sishui New Energy") [member] Member hnp:HuanengShandongSishuiNewEnergyLimitedCompanyMember
1518 Huaneng Shandong Electric And Thermal Power Marketing Limited Company ("Shandong Power Marketing") [member] Member hnp:HuanengShandongElectricAndThermalPowerMarketingLimitedCompanyMember
1519 Huaneng Shandong Information Technology Limited Company ("Shandong Power Information Company") [member] Member hnp:HuanengShandongInformationTechnologyLimitedCompanyMember
1520 Huaneng Zhanhua New Energy Limited Company ("Zhanhua New Energy") [member] Member hnp:HuanengZhanhuaNewEnergyLimitedCompanyMember
1521 Huaneng Weihai Port Photovoltaic Power Generation Limited Company ("Port Photovoltaic") [member] Member hnp:HuanengWeihaiPortPhotovoltaicPowerGenerationLimitedCompanyMember
1522 Huaneng Jinan Huangtai Power Limited Company ("Huangtai Power") [member] Member hnp:HuanengJinanHuangtaiPowerLimitedCompanyMember
1523 Huaneng Dezhou Thermal Power Limited Company ("Dezhou Thermal Power") [member] Member hnp:HuanengDezhouThermalPowerLimitedCompanyMember
1524 Huaneng Dongying New Energy Limited Company ("Dongying New Energy") [member] Member hnp:HuanengDongyingNewEnergyLimitedCompanyMember
1525 Huaneng Shandong Power Generation Maintenance Technology Limited Company ("Shandong Maintenance Company") [member] Member hnp:HuanengShandongPowerGenerationMaintenanceTechnologyLimitedCompanyMember
1526 Huaneng Shandong Electric Power Fuel Limited Company ("Shandong Fuel Company") [member] Member hnp:HuanengShandongElectricPowerFuelLimitedCompanyMember
1527 Shandong Rizhao Power Generation Limited Company ("Rizhao Power") [member] Member hnp:ShandongRizhaoPowerGenerationLimitedCompanyMember
1528 Huaneng Laiwu Power Generation Limited Company ("Laiwu Power") [member] Member hnp:HuanengLaiwuPowerGenerationLimitedCompanyMember
1529 Huaneng Shandong Ruyi Coal Power Limited Company ("Ruyi Coal Power") [member] Member hnp:HuanengShandongRuyiCoalPowerLimitedCompanyMember
1530 Huaneng Jiaxiang Power Generation Limited Company ("Jiaxiang Power") [member] Member hnp:HuanengJiaxiangPowerGenerationLimitedCompanyMember
1531 Huaneng Qufu Co-generation Limited Company ("Qufu Co-generation") [member] Member hnp:HuanengQufuCoGenerationLimitedCompanyMember
1532 Huaneng Jining Hi-Tech Zone Co-generation Limited Company ("Jining Co-generation") [member] Member hnp:HuanengJiningHiTechZoneCoGenerationLimitedCompanyMember
1533 Huaneng Shandong (Hong Kong) Investment Limited Company ("Hong Kong Investment") [member] Member hnp:HuanengShandongHongKongInvestmentLimitedCompanyMember
1534 Shandong Silk Road International Power Limited Company ("Shandong Silk Road") [member] Member hnp:ShandongSilkRoadInternationalPowerLimitedCompanyMember
1535 Shandong Changdao Wind Power Generation Limited Liability Company ("Changdao Wind Power") [member] Member hnp:ShandongChangdaoWindPowerGenerationLimitedLiabilityCompanyMember
1536 Huaneng Rongcheng New Energy Co., Ltd. ("Rongcheng New Energy") [member] Member hnp:HuanengRongchengNewEnergyCoLtdMember
1537 Huaneng Jining Yunhe Power Generation Co., Ltd. ("Yunhe Power") [member] Member hnp:HuanengJiningYunhePowerGenerationCoLtdMember
1538 Huaneng Linyi Power Generation Limited Company ("Linyi Power") [member] Member hnp:HuanengLinyiPowerGenerationLimitedCompanyMember
1539 Liaocheng Changrun National Electric Heating Limited Company ("Liaocheng Changrun") [member] Member hnp:LiaochengChangrunNationalElectricHeatingLimitedCompanyMember
1540 Linyi Lantian Thermal Power Limited Company ("Lantian Thermal Power") [member] Member hnp:LinyiLantianThermalPowerLimitedCompanyMember
1541 Yantai 500 Heating Limited Company ("Yantai 500") [member] Member hnp:Yantai500HeatingLimitedCompanyMember
1542 Huaneng Liaocheng Co-generation Limited Company ("Liaocheng Co-generation) [member] Member hnp:HuanengLiaochengCoGenerationLimitedCompanyMember
1543 Huaneng Henan Zhongyuan Gas Power Generation Co., Ltd. ("Zhongyuan Gas") [member] Member hnp:HuanengHenanZhongyuanGasPowerGenerationLimitedCompanyMember
1544 Shandong Huaneng Liaocheng Thermal Power Co., Ltd. ("Shandong Liaocheng Thermal Power") [member] Member hnp:ShandongHuanengLiaochengThermalPowerCoLtdMember
1545 Shandong Huaneng Laiwu Thermal Power Co., Ltd. ("Shandong Laiwu Thermal Power") [member] Member hnp:ShandongHuanengLaiwuThermalPowerCoLtdMember
1546 Shandong Huaneng Laizhou Wind Power Generation Co., Ltd. ("Laizhou Wind Power") [member] Member hnp:ShandongHuanengLaizhouWindPowerGenerationCoLtdMember
1547 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
1548 Country of incorporation Concept (Text/String) For Period ifrs-full:CountryOfIncorporationOrResidenceOfSubsidiary
1549 Type of interest held Concept (Text/String) For Period hnp:TypeOfInterestHeld
1550 Registered capital Concept (Monetary) As Of Credit hnp:RegisteredCapital
1551 Registered capital Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
1552 Business nature and scope of operation Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities
1553 Percentage of equity interest held, Interest Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
1554 Percentage of equity interest held, Voting Concept (Percent) For Period ifrs-full:ProportionOfVotingPowerHeldInSubsidiary
1555 40902 - Disclosure - Investments in subsidiaries (Subsidiaries acquired from business combinations not under common control) (Detail) Network

*

*

http://www.hpi.com.cn/role/InvestmentsInSubsidiariesSubsidiariesAcquiredFromBusinessCombinationsNotUnderCommonControlDetail
1556 Disclosure of subsidiaries [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
1557 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1558 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1559 Huaneng Weihai Power Generation Limited Liability Company ("Weihai Power") [member] Member hnp:HuanengWeihaiPowerGenerationLimitedLiabilityCompanyMember
1560 Huaneng Huaiyin Power Generation Limited Company [member] Member hnp:HuanengHuaiyinPowerGenerationLimitedCompanyMember
1561 Huade County Daditaihong Wind Power Utilization Limited Liability Company [member] Member hnp:HuadeCountyDaditaihongWindPowerUtilizationLimitedLiabilityCompanyMember
1562 Huaneng Zhanhua Co-generation Limited Company [member] Member hnp:HuanengZhanhuaCoGenerationLimitedCompanyMember
1563 Shandong Hualu Sea Transportation Limited Company [member] Member hnp:ShandongHualuSeaTransportationLimitedCompanyMember
1564 Huaneng Qingdao Port Limited Company [member] Member hnp:HuanengQingdaoPortLimitedCompanyMember
1565 Huaneng Yunnan Diandong Energy Limited Liability Company ("Diandong Energy") [member] Member hnp:HuanengYunnanDiandongEnergyLimitedLiabilityCompanyMember
1566 Yunnan Diandong Yuwang Energy Limited Company ("Diandong Yuwang") [member] Member hnp:YunnanDiandongYuwangEnergyLimitedCompanyMember
1567 Huaneng Luoyang Co-generation Limited Liability Company [member] Member hnp:HuanengLuoyangCoGenerationLimitedLiabilityCompanyMember
1568 Huaneng Zhumadian Wind Power Generation Co., Ltd. [member] Member hnp:HuanengZhumadianWindPowerGenerationCoLtdMember
1569 SinoSing Power [member] Member hnp:SinosingPowerMember
1570 Tuas Power [member] Member hnp:TuasPowerMember
1571 Tuas Power Supply Pte. Ltd. [member] Member hnp:TuasPowerSupplyPteLtdMember
1572 TP Asset Management Pte. Ltd. [member] Member hnp:TpAssetManagementPteLtdMember
1573 TPGS Green Energy Pte. Ltd. [member] Member hnp:TpgsGreenEnergyPteLtdMember
1574 Luoyang Yangguang Co-generation Limited Liability Company ("Yangguang Co-generation") [member] Member hnp:LuoyangYangguangCogenerationLimitedLiabilityCompanyMember
1575 Shanxi Xiaoyi Economic Development Zone Huaneng Energy Service Co., Ltd. ("Shanxi Xiaoyi Energy") [member] Member hnp:ShanxiXiaoyiEconomicDevelopmentZoneHuanengEnergyServiceCoLtdMember
1576 Ruzhou Xuji Wind Power Generation Co., Ltd. [member] Member hnp:RuzhouXujiWindPowerGenerationLiabilityCompanyMember
1577 Hong Kong Energy (Note 41) [member] Member hnp:HuanengShandongRuyiHongKongEnergyCoLtdMember
1578 Ruyi Pakistan Energy (Note 41) [member] Member hnp:HuanengShandongRuyiPakistanEnergyPrivateCoLtdMember
1579 Shandong Huatai Electric Power Operation & Maintenance (Private) Co., Ltd.("Huatai Power") (Note 41) [member] Member hnp:ShandongHuataiElectricPowerOperationMaintenancePrivateCoLtdMember
1580 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
1581 Country of incorporation Concept (Text/String) For Period ifrs-full:CountryOfIncorporationOrResidenceOfSubsidiary
1582 Type of interest held Concept (Text/String) For Period hnp:TypeOfInterestHeld
1583 Registered capital Concept (Monetary) As Of Credit hnp:RegisteredCapital
1584 Registered capital Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
1585 Business nature and scope of operation Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities
1586 Percentage of equity interest held, Interest Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
1587 Percentage of equity interest held, Voting Concept (Percent) For Period ifrs-full:ProportionOfVotingPowerHeldInSubsidiary
1588 40903 - Disclosure - Investments in subsidiaries (Detail information of equity interests held) (Detail) Network

*

*

http://www.hpi.com.cn/role/InvestmentsInSubsidiariesDetailInformationOfEquityInterestsHeldDetail
1589 Disclosure of subsidiaries [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
1590 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1591 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1592 Huaqing Energy [member] Member hnp:ChongqingHuaqingEnergyCoLtdMember
1593 Nanjing Combined Cycle Co-generation [member] Member hnp:HuanengNanjingCombinedCycleCoGenerationCoLtdMember
1594 Zhanhua Photovoltaic Company [member] Member hnp:HuanengZhanhuaPhotovoltaicPowerGenerationLimitedCompanyMember
1595 Ruyi Coal Power [member] Member hnp:HuanengShandongRuyiCoalPowerLimitedCompanyMember
1596 Shandong Fuel Company [member] Member hnp:HuanengShandongElectricPowerFuelLimitedCompanyMember
1597 Shandong Maintenance Company [member] Member hnp:HuanengShandongPowerGenerationMaintenanceTechnologyLimitedCompanyMember
1598 Rizhao Power [member] Member hnp:ShandongRizhaoPowerGenerationLimitedCompanyMember
1599 Laiwu power [member] Member hnp:HuanengLaiwuPowerLimitedCompanyMember
1600 Beijing Co-generation [member] Member hnp:HuanengBeijingCoGenerationLimitedLiabilityCompanyMember
1601 Chaohu Power [member] Member hnp:HuanengChaohuPowerGenerationCoLtdMember
1602 Shanxi Xiaoyi Energy [member] Member hnp:ShanxiXiaoyiEconomicDevelopmentZoneHuanengEnergyServiceCoLtdMember
1603 Shareholders [axis] Axis hnp:ShareholdersAxis
1604 Shareholders [member] Member hnp:ShareholdersMember
1605 Liangjiang Power [member] Member hnp:HuanengChongqingLiangjiangPowerGenerationLimitedLiabilityCompanyMember
1606 Shareholder one [member] Member hnp:ShareholderOneMember
1607 Shareholder two [member] Member hnp:ShareholderTwoMember
1608 Zhanhua New Energy [member] Member hnp:HuanengZhanhuaNewEnergyLimitedCompanyMember
1609 Shandong Power [member] Member hnp:HuanengShandongPowerGenerationLimitedCompanyMember
1610 Shareholder three [member] Member hnp:ShareholderThreeMember
1611 Shareholder four [member] Member hnp:ShareholderFourMember
1612 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
1613 Percentage of interests held by the Company Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
1614 Proportion of ownership interests held by non-controlling interests Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
1615 Percentage of interests directly held by the Company Concept (Percent) For Period hnp:ProportionOfOwnershipInterestsInSubsidiaryDirectly
1616 Percentage of interests indirectly held by the Company Concept (Percent) For Period hnp:ProportionOfOwnershipInterestsInSubsidiaryIndirectly
1617 Percentage of voting rights acquired through supplemental agreements Concept (Percent) For Period hnp:PercentageOfVotingRightsAcquiredThroughSupplementalAgreements
1618 41000 - Disclosure - Other equity instrument investments (Detail) Network

*

*

http://www.hpi.com.cn/role/OtherEquityInstrumentInvestmentsDetail
1619 Other equity instrument investments [table] Table

*

*

ifrs-full:DisclosureOfFairValueOfInvestmentsInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeTable
1620 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1621 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
1622 Fair value measurement [member] Member ifrs-full:FinancialAssetsAtFairValueMember
1623 Cost measurement [member] Member ifrs-full:FinancialAssetsAtAmortisedCostMember
1624 Financial assets by investment item [axis] Axis hnp:FinancialAssetsByInvestmentItemAxis
1625 Financial assets by investment item [member] Member hnp:FinancialAssetsByInvestmentItemMember
1626 Listed security [member] Member hnp:ListedSecurityMember
1627 Unlisted securities [member] Member hnp:UnlistedSecuritiesMember
1628 10% of Shanxi Xishan Jinxing Energy Co., Ltd. [member] Member hnp:ShanxiXishanJinxingEnergyCoLtdMember
1629 9.09% of Ganlong Double-track Railway Co., Ltd. [member] Member hnp:GanlongDoubleTrackRailwayCoLtdMember
1630 Others [member] Member hnp:OtherUnlistedSecuritiesMember
1631 Other equity instrument investments [line items] LineItems ifrs-full:DisclosureOfFairValueOfInvestmentsInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeLineItems
1632 Equity securities designated at FVOCI (non-recycling) Concept (Monetary) As Of Debit ifrs-full:NoncurrentInvestmentsInEquityInstrumentsDesignatedAtFairValueThroughOtherComprehensiveIncome
1633 Available-for-sale financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAvailableforsale
1634 Adjusted balance of equity securities designated at FVOCI (non-recycling) at the beginning of the year Concept (Monetary) As Of Debit hnp:NonCurrentInvestmentsInEquityInstrumentsDesignatedAtFairValueThroughOtherComprehensiveIncomeCarryingAmountImmediatelyAfterInitialApplicationOfIfrs9
1635 Adjusted balance of available-for-sale financial assets at the beginning of the year Concept (Monetary) As Of Debit hnp:FinancialAssetsAvailableForSaleCarryingAmountImmediatelyAfterInitialApplicationOfIfrs9
1636 Impairment provisions Concept (Monetary) For Period Debit hnp:ImpairmentProvisionsProvidedOnAvailableForSaleFinancialAssets
1637 41100 - Disclosure - Land use rights (Detail) Network

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*

http://www.hpi.com.cn/role/LandUseRightsDetail
1638 Disclosure of detailed information about land use rights [table] Table

*

*

hnp:DisclosureOfDetailedInformationAboutLandUseRightsTable
1639 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1640 Carrying amount [member] Member ifrs-full:CarryingAmountMember
1641 Cost [member] Member ifrs-full:GrossCarryingAmountMember
1642 Accumulated amortization [member] Member ifrs-full:AccumulatedDepreciationAndAmortisationMember
1643 Accumulated impairment losses [member] Member ifrs-full:AccumulatedImpairmentMember
1644 Disclosure of detailed information about land use rights [line items] LineItems hnp:DisclosureOfDetailedInformationAboutLandUseRightsLineItems
1645 Beginning of the year Concept (Monetary) As Of Debit hnp:LandUseRights
1646 Movement: Abstract hnp:ChangesOfLandUseRightsAbstract
1647 Business combination (Note 41) Concept (Monetary) For Period Debit hnp:AcquisitionsThroughBusinessCombinationsLandUseRights
1648 Addition Concept (Monetary) For Period Debit hnp:AdditionsOtherThanThroughBusinessCombinationsLandUseRights
1649 Amortization charge for the year Concept (Monetary) For Period Credit hnp:AmortisationLandUseRights
1650 Impairment charge for the year (Note 7) Concept (Monetary) For Period Credit hnp:ProvisionForImpairmentOfLandUseRights
1651 Reclassification to assets held for sale (Note 20) Concept (Monetary) For Period Credit hnp:ReclassificationToAssetsHeldForSaleLandUseRights
1652 Disposals Concept (Monetary) For Period Credit hnp:DisposalsLandUseRights
1653 Disposal of subsidiaries Concept (Monetary) For Period Credit hnp:DecreaseInLandUseRightsBecauseOfDisposalOfSubsidiaries
1654 Currency translation differences Concept (Monetary) For Period Debit hnp:IncreaseDecreaseThroughNetExchangeDifferencesLandUseRights
1655 End of the year Concept (Monetary) As Of Debit hnp:LandUseRights
1656 Land use rights without ownership certificate [abstract] Abstract hnp:LandUseRightsWithoutOwnershipCertificateAbstract
1657 Aggregate net book value Concept (Monetary) As Of Debit hnp:NetBookValueOfLandUseRightsWithoutOwnershipCertificate
1658 41200 - Disclosure - Power generation licenses (Detail) Network

*

*

http://www.hpi.com.cn/role/PowerGenerationLicensesDetail
1659 Implied Table Table

*

*

implied:Table
1660 Power generation licenses [abstract] Abstract hnp:PowerGenerationLicensesAbstract
1661 Beginning of the year Concept (Monetary) As Of Debit ifrs-full:LicencesAndFranchises
1662 Movement: Abstract hnp:ChangesOfPowerGenerationLicenseAbstract
1663 Currency translation differences Concept (Monetary) For Period Debit hnp:IncreaseDecreaseThroughNetExchangeDifferencesPowerGenerationLicense
1664 End of the year Concept (Monetary) As Of Debit ifrs-full:LicencesAndFranchises
1665 41201 - Disclosure - Power generation license (Narrative) (Detail) Network

*

*

http://www.hpi.com.cn/role/PowerGenerationLicenseNarrativeDetail
1666 Impairment test of power generation license [table] Table

*

*

hnp:ImpairmentTestOfPowerGenerationLicenseTable
1667 Changes in rates [axis] Axis hnp:ChangesInRatesAxis
1668 Changes in rates [member] Member hnp:ChangesInRatesMember
1669 Absolute increase in discount rate of 0.5% [member] Member hnp:AbsoluteIncreaseInDiscountRateOfOneHalfPercentMember
1670 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
1671 Assets [member] Member ifrs-full:ClassesOfAssetsMember
1672 Power generation license [member] Member ifrs-full:LicencesMember
1673 Cash-generating units [axis] Axis ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
1674 Entity's total for cash-generating units [member] Member ifrs-full:EntitysTotalForCashgeneratingUnitsMember
1675 Tuas Power [member] Member hnp:TuasPowerMember
1676 Impairment test of power generation license [line items] LineItems hnp:ImpairmentTestOfPowerGenerationLicenseLineItems
1677 Discount rates Concept (Percent) As Of ifrs-full:DescriptionOfDiscountRatesUsedInCurrentEstimateOfValueInUse
1678 Recoverable amount of the CGU Concept (Monetary) For Period Debit hnp:IncreaseDecreaseInRecoverableAmountOfCashGeneratingUnit
1679 Growth rates on average Concept (Percent) As Of hnp:GrowthRatesOnAverageUsedInConsiderationOfFutureExpansionPlansAndNewDevelopmentProjects
1680 Growth rates of cash flows beyond the terminal year Concept (Percent) As Of ifrs-full:DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections
1681 Impairment provided for the power generation license Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossRecognisedInProfitOrLoss
1682 41300 - Disclosure - Mining rights (Detail) Network

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*

http://www.hpi.com.cn/role/MiningRightsDetail
1683 Disclosure of detailed information about mining rights [table] Table

*

*

hnp:DisclosureOfDetailedInformationAboutMiningRightsTable
1684 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1685 Carrying amount [member] Member ifrs-full:CarryingAmountMember
1686 Cost [member] Member ifrs-full:GrossCarryingAmountMember
1687 Accumulated impairment losses [member] Member ifrs-full:AccumulatedImpairmentMember
1688 Disclosure of detailed information about mining rights [line items] LineItems hnp:DisclosureOfDetailedInformationAboutMiningRightsLineItems
1689 Beginning of the year Concept (Monetary) As Of Debit hnp:MiningRights
1690 Movement: Abstract hnp:ChangesOfMiningRightsAbstract
1691 Addition Concept (Monetary) For Period Debit hnp:AdditionsOtherThanThroughBusinessCombinationsMiningRights
1692 Impairment charge for the year Concept (Monetary) For Period Credit hnp:ProvisionForImpairmentOfMiningRights
1693 End of the year Concept (Monetary) As Of Debit hnp:MiningRights
1694 Discount rate applied in determining the recoverable amounts of the mining rights Concept (Percent) As Of hnp:DiscountRateAppliedInDeterminingRecoverableAmountsOfMiningRights
1695 41400 - Disclosure - Derivative financial instruments (Details of derivative financial assets) (Detail) Network

*

*

http://www.hpi.com.cn/role/DerivativeFinancialInstrumentsDetailsOfDerivativeFinancialAssetsDetail
1696 Details of derivative financial instruments [table] Table

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*

hnp:DetailsOfDerivativeFinancialInstrumentsTable
1697 Types of derivative financial instruments [axis] Axis hnp:TypesOfDerivativeFinancialInstrumentsAxis
1698 Types of derivative financial instruments [member] Member hnp:TypesOfDerivativeFinancialInstrumentsMember
1699 Hedging instruments for cash flow hedge (fuel swap contracts) [member] Member hnp:HedgingInstrumentsForCashFlowHedgeFuelSwapContractsUsedForHedgingMember
1700 Hedging instruments for cash flow hedge (exchange forward contracts) [member] Member hnp:HedgingInstrumentsForCashFlowHedgeExchangeForwardContractsUsedForHedgingMember
1701 Financial instruments at fair value through profit or loss (fuel swap contracts) [member] Member hnp:FinancialInstrumentsAtFairValueThroughProfitOrLossFuelSwapContractsNotQualifyAsHedgesMember
1702 Financial instruments at fair value through profit or loss (exchange forward swap contracts) [member] Member hnp:FinancialInstrumentsAtFairValueThroughProfitOrLossExchangeForwardSwapContractsNotQualifyAsHedgesMember
1703 Details of derivative financial instruments [line items] LineItems hnp:DetailsOfDerivativeFinancialInstrumentsLineItems
1704 Derivative financial assets Concept (Monetary) As Of Debit ifrs-full:DerivativeFinancialAssets
1705 Less: non-current portion Concept (Monetary) As Of Debit ifrs-full:NoncurrentDerivativeFinancialAssets
1706 Current portion Concept (Monetary) As Of Debit ifrs-full:CurrentDerivativeFinancialAssets
1707 41401 - Disclosure - Derivative financial instruments (Details of derivative financial liabilities) (Detail) Network

*

*

http://www.hpi.com.cn/role/DerivativeFinancialInstrumentsDetailsOfDerivativeFinancialLiabilitiesDetail
1708 Details of derivative financial instruments [table] Table

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*

hnp:DetailsOfDerivativeFinancialInstrumentsTable
1709 Types of derivative financial instruments [axis] Axis hnp:TypesOfDerivativeFinancialInstrumentsAxis
1710 Types of derivative financial instruments [member] Member hnp:TypesOfDerivativeFinancialInstrumentsMember
1711 Hedging instruments for cash flow hedge (fuel swap contracts) [member] Member hnp:HedgingInstrumentsForCashFlowHedgeFuelSwapContractsUsedForHedgingMember
1712 Hedging instruments for cash flow hedge (exchange forward contracts) [member] Member hnp:HedgingInstrumentsForCashFlowHedgeExchangeForwardContractsUsedForHedgingMember
1713 Hedging instruments for cash flow hedge (interest rate swap contracts) [member] Member hnp:HedgingInstrumentsForCashFlowHedgeInterestRateSwapContractsUsedForHedgingMember
1714 Financial instruments at fair value through profit or loss (fuel swap contracts) [member] Member hnp:FinancialInstrumentsAtFairValueThroughProfitOrLossFuelSwapContractsNotQualifyAsHedgesMember
1715 Financial instruments at fair value through profit or loss (exchange forward swap contracts) [member] Member hnp:FinancialInstrumentsAtFairValueThroughProfitOrLossExchangeForwardSwapContractsNotQualifyAsHedgesMember
1716 Details of derivative financial instruments [line items] LineItems hnp:DetailsOfDerivativeFinancialInstrumentsLineItems
1717 Derivative financial liabilities Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilities
1718 Less: non-current portion Concept (Monetary) As Of Credit ifrs-full:NoncurrentDerivativeFinancialLiabilities
1719 Current portion Concept (Monetary) As Of Credit ifrs-full:CurrentDerivativeFinancialLiabilities
1720 41402 - Disclosure - Derivative financial instruments (Narrative) (Detail) Network

*

*

http://www.hpi.com.cn/role/DerivativeFinancialInstrumentsNarrativeDetail
1721 Details of derivative financial instruments [table] Table

*

*

hnp:DetailsOfDerivativeFinancialInstrumentsTable
1722 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1723 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1724 The Company [member] Member ifrs-full:ParentMember
1725 TPG and TPSTMWR [member] Member hnp:TuasPowerGenerationPteLtdAndTpStmWaterResourcesPteLtdMember
1726 TPG [member] Member hnp:TuasPowerGenerationPteLtdMember
1727 TPSTMWR [member] Member hnp:TpStmWaterResourcesPteLtdMember
1728 Types of derivative financial instruments [axis] Axis hnp:TypesOfDerivativeFinancialInstrumentsAxis
1729 Types of derivative financial instruments [member] Member hnp:TypesOfDerivativeFinancialInstrumentsMember
1730 Interest rate swap contract [member] Member ifrs-full:InterestRateSwapContractMember
1731 Details of derivative financial instruments [line items] LineItems hnp:DetailsOfDerivativeFinancialInstrumentsLineItems
1732 Material ineffective portion recognised in the profit or loss arising from cash flow hedges Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnIneffectivenessOfCashFlowHedgesRecognisedInProfitOrLoss
1733 Notional amount Concept (Monetary) As Of ifrs-full:NotionalAmount
1734 Annual fixed interest Concept (Percent) For Period hnp:DerivativeAnnualFixedInterestRate
1735 Original annual floating interest Concept (Text/String) For Period hnp:DerivativeAnnualFloatingInterestTerm
1736 Derivative financial liabilities Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilities
1737 41403 - Disclosure - Derivative financial instruments (Analysis of contractual cash inflows (outflows) of major derivative financial instruments) (Detail) Network

*

*

http://www.hpi.com.cn/role/DerivativeFinancialInstrumentsAnalysisOfContractualCashInflowsOutflowsOfMajorDerivativeFinancialInstrumentsDetail
1738 Details of derivative financial instruments [table] Table

*

*

hnp:DetailsOfDerivativeFinancialInstrumentsTable
1739 Cash flows [axis] Axis ifrs-full:MaturityAxis
1740 Contractual cash flows [member] Member ifrs-full:AggregatedTimeBandsMember
1741 Within 1 year [member] Member ifrs-full:NotLaterThanOneYearMember
1742 Cash flows, Between 1 and 5 years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1743 Cash flows, After 5 years [member] Member ifrs-full:LaterThanFiveYearsMember
1744 Types of derivative financial instruments [axis] Axis hnp:TypesOfDerivativeFinancialInstrumentsAxis
1745 Types of derivative financial instruments [member] Member hnp:TypesOfDerivativeFinancialInstrumentsMember
1746 Fuel derivatives used for hedging [member] Member hnp:HedgingInstrumentsForCashFlowHedgeFuelSwapContractsUsedForHedgingMember
1747 Forward exchange contracts used for hedging [member] Member hnp:HedgingInstrumentsForCashFlowHedgeExchangeForwardContractsUsedForHedgingMember
1748 Forward exchange contracts that do not qualify as hedges [member] Member hnp:HedgingInstrumentsForCashFlowHedgeExchangeForwardContractsNotQualifyAsHedgesMember
1749 Fuel derivatives that do not qualify as hedges [member] Member hnp:FinancialInstrumentsAtFairValueThroughProfitOrLossFuelSwapContractsNotQualifyAsHedgesMember
1750 Net-settled interest rate swaps used for hedging [member] Member hnp:HedgingInstrumentsForCashFlowHedgeInterestRateSwapContractsUsedForHedgingMember
1751 Details of derivative financial instruments [line items] LineItems hnp:DetailsOfDerivativeFinancialInstrumentsLineItems
1752 Derivative financial assets, Carrying amounts Concept (Monetary) As Of Debit ifrs-full:DerivativeFinancialAssets
1753 Derivative financial liabilities, Carrying amounts Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilities
1754 Derivative financial assets - inflows, Contractual cash flows Concept (Monetary) As Of Debit hnp:DerivativeFinancialAssetsUndiscountedCashInflows
1755 Derivative financial assets - outflows, Contractual cash flows Concept (Monetary) As Of Credit hnp:DerivativeFinancialAssetsUndiscountedCashOutflows
1756 Derivative financial assets (net settlement), Contractual cash flows Concept (Monetary) As Of Debit hnp:DerivativeFinancialAssetsUndiscountedCashFlows
1757 Derivative financial liabilities - inflows, Contractual cash flows Concept (Monetary) As Of Debit hnp:DerivativeFinancialLiabilitiesUndiscountedCashInflows
1758 Derivative financial liabilities - outflows, Contractual cash flows Concept (Monetary) As Of Credit hnp:DerivativeFinancialLiabilitiesUndiscountedCashOutflows
1759 Derivative financial liabilities (net settlement), Contractual cash flows Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilitiesUndiscountedCashFlows
1760 41500 - Disclosure - Goodwill (Movements of goodwill) (Detail) Network

*

*

http://www.hpi.com.cn/role/GoodwillMovementsOfGoodwillDetail
1761 Disclosure of reconciliation of changes in goodwill [table] Table

*

*

ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillTable
1762 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1763 Carrying amount [member] Member ifrs-full:CarryingAmountMember
1764 Cost [member] Member ifrs-full:GrossCarryingAmountMember
1765 Accumulated impairment losses [member] Member ifrs-full:AccumulatedImpairmentMember
1766 Disclosure of reconciliation of changes in goodwill [line items] LineItems ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillLineItems
1767 Beginning of the year Concept (Monetary) As Of Debit ifrs-full:Goodwill
1768 Movement: Abstract ifrs-full:ChangesInGoodwillAbstract
1769 Business combination (Note 41) Concept (Monetary) For Period Debit ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill
1770 Impairment charge for the year Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill
1771 Disposal of subsidiary Concept (Monetary) For Period Credit hnp:DecreaseThroughDisposalOfSubsidiariesGoodwill
1772 Currency translation differences Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesGoodwill
1773 End of the year Concept (Monetary) As Of Debit ifrs-full:Goodwill
1774 41501 - Disclosure - Goodwill (Impairment test for goodwill) (Carrying amounts of major goodwill allocated to individual CGUs) (Detail) Network

*

*

http://www.hpi.com.cn/role/GoodwillImpairmentTestForGoodwillCarryingAmountsOfMajorGoodwillAllocatedToIndividualCgusDetail
1775 Impairment test for goodwill [table] Table

*

*

hnp:ImpairmentTestForGoodwillTable
1776 Cash-generating units [axis] Axis ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
1777 Entity's total for cash-generating units [member] Member ifrs-full:EntitysTotalForCashgeneratingUnitsMember
1778 Shandong Power [member] Member hnp:HuanengShandongPowerGenerationLimitedCompanyMember
1779 Wuhan Power [member] Member hnp:HuanengWuhanPowerGenerationCoLtdMember
1780 Hainan Power [member] Member hnp:HuanengHainanPowerIncMember
1781 Heilongjiang Power [member] Member hnp:HuanengHeilongjiangPowerGenerationLimitedCompanyMember
1782 Yangliuqing Co-generation [member] Member hnp:TianjinHuanengYangliuqingCoGenerationLimitedLiabilityCompanyMember
1783 Qinbei Power [member] Member hnp:HuanengQinbeiPowerGenerationCoLtdMember
1784 Jilin Power [member] Member hnp:HuanengJilinPowerGenerationLimitedCompanyMember
1785 Yueyang Power Company [member] Member hnp:HuanengHunanYueyangPowerGenerationLimitedLiabilityCompanyMember
1786 Beijing Co-generation [member] Member hnp:HuanengBeijingCoGenerationLimitedLiabilityCompanyMember
1787 Tuas Power [member] Member hnp:TuasPowerMember
1788 Impairment test for goodwill [line items] LineItems hnp:ImpairmentTestForGoodwillLineItems
1789 Major Goodwill allocated to individual CGUs Concept (Monetary) As Of Debit ifrs-full:Goodwill
1790 41502 - Disclosure - Goodwill (Impairment test for goodwill) (Rates used for value-in-use calculations) (Detail) Network

*

*

http://www.hpi.com.cn/role/GoodwillImpairmentTestForGoodwillRatesUsedForValueInUseCalculationsDetail
1791 Impairment test for goodwill [table] Table

*

*

hnp:ImpairmentTestForGoodwillTable
1792 Cash-generating units [axis] Axis ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
1793 Entity's total for cash-generating units [member] Member ifrs-full:EntitysTotalForCashgeneratingUnitsMember
1794 PRC power segment [member] Member hnp:PrcPowerSegmentMember
1795 Singapore segment [member] Member hnp:SingaporeSegmentMember
1796 Range [axis] Axis ifrs-full:RangeAxis
1797 Ranges [member] Member ifrs-full:RangesMember
1798 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
1799 Top of range [member] Member ifrs-full:TopOfRangeMember
1800 Impairment test for goodwill [line items] LineItems hnp:ImpairmentTestForGoodwillLineItems
1801 Growth rates on average Concept (Percent) As Of hnp:GrowthRatesOnAverageUsedInConsiderationOfFutureExpansionPlansAndNewDevelopmentProjects
1802 Growth rates of cash flows beyond the terminal year Concept (Percent) As Of ifrs-full:DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections
1803 Discount rates Concept (Percent) As Of ifrs-full:DescriptionOfDiscountRatesUsedInCurrentEstimateOfValueInUse
1804 41600 - Disclosure - Other non-current assets (Details of other non-current assets) (Detail) Network

*

*

http://www.hpi.com.cn/role/OtherNonCurrentAssetsDetailsOfOtherNonCurrentAssetsDetail
1805 Implied Table Table

*

*

implied:Table
1806 Other non-current assets [abstract] Abstract hnp:OtherNonCurrentAssetsAbstract
1807 Finance lease receivables Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinanceLeaseReceivables
1808 VAT recoverable Concept (Monetary) As Of Debit ifrs-full:NoncurrentValueAddedTaxReceivables
1809 Prepayments for pre-construction cost Concept (Monetary) As Of Debit hnp:NonCurrentPrepaymentsForPreConstructionCost
1810 Intangible assets Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
1811 Profit compensation from Huaneng Group Concept (Monetary) As Of Debit hnp:NonCurrentAssetRecognisedForExpectedReimbursementContingentLiabilitiesInBusinessCombination
1812 Prepaid territorial water use right Concept (Monetary) As Of Debit hnp:NonCurrentPrepaidTerritorialWaterUseRight
1813 Prepayments for capacity quota Concept (Monetary) As Of Debit hnp:NonCurrentPrepaymentsForCapacityQuota
1814 Prepaid connection fees Concept (Monetary) As Of Debit hnp:NonCurrentPrepaidConnectionFees
1815 Others Concept (Monetary) As Of Debit hnp:OtherNonCurrentAssetsOthers
1816 Total Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentAssets
1817 Impairment provided for the intangible assets Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill
1818 Financial assets at fair value through profit or loss, contingent consideration from Huaneng Group Concept (Monetary) As Of Debit hnp:FinancialAssetsAtFairValueThroughProfitOrLossContingentConsiderationFromUltimateParentCompanyOfCompany
1819 Compensation recorded in other receivables and assets Concept (Monetary) As Of Debit hnp:CurrentAssetRecognisedForExpectedReimbursementContingentLiabilitiesInBusinessCombination
1820 Profit compensation related to current year recorded in "other receivables and assets" Concept (Monetary) As Of Debit hnp:CurrentAssetRecognisedForExpectedReimbursementContingentLiabilitiesInBusinessCombinationRelatedToCurrentYear
1821 Contractual period of amortization, prepaid territorial water use right Concept (Text/String) For Period hnp:ContractualPeriodOfAmortizationPrepaidTerritorialWaterUseRight
1822 41700 - Disclosure - Inventories (Details of inventories) (Detail) Network

*

*

http://www.hpi.com.cn/role/InventoriesDetailsOfInventoriesDetail
1823 Implied Table Table

*

*

implied:Table
1824 Inventories [abstract] Abstract hnp:InventoriesAbstract
1825 Fuel (coal and oil) for power generation Concept (Monetary) As Of Debit ifrs-full:CurrentFuel
1826 Material and supplies Concept (Monetary) As Of Debit ifrs-full:CurrentRawMaterialsAndCurrentProductionSupplies
1827 Gross amounts of inventories Concept (Monetary) As Of Debit hnp:GrossAmountsOfCurrentInventories
1828 Less: provision for inventory obsolescence Concept (Monetary) As Of Credit hnp:ProvisionForInventoryObsolescence
1829 Total Concept (Monetary) As Of Debit ifrs-full:Inventories
1830 41701 - Disclosure - Inventories (Movements of provision for inventory obsolescence during years) (Detail) Network

*

*

http://www.hpi.com.cn/role/InventoriesMovementsOfProvisionForInventoryObsolescenceDuringYearsDetail
1831 Implied Table Table

*

*

implied:Table
1832 Inventories [abstract] Abstract hnp:InventoriesAbstract
1833 Beginning of the year Concept (Monetary) As Of Credit hnp:ProvisionForInventoryObsolescence
1834 Provision Concept (Monetary) For Period ifrs-full:InventoryWritedown2011
1835 Reversal Concept (Monetary) For Period ifrs-full:ReversalOfInventoryWritedown
1836 Disposal of subsidiaries Concept (Monetary) For Period Debit hnp:DecreaseThroughLossOfControlOfSubsidiaryProvisionForInventoryObsolescence
1837 Currency translation differences Concept (Monetary) For Period Credit hnp:ProvisionForInventoryObsolescenceDifferenceOnTranslationOfForeignCurrencyFinancialStatements
1838 End of the year Concept (Monetary) As Of Credit hnp:ProvisionForInventoryObsolescence
1839 Provision provided for fuel oil Concept (Monetary) For Period Credit hnp:InventoryWriteDownFuelOil
1840 41800 - Disclosure - Other receivables and assets (Detail) Network

*

*

http://www.hpi.com.cn/role/OtherReceivablesAndAssetsDetail
1841 Implied Table Table

*

*

implied:Table
1842 Other receivables and assets [abstract] Abstract hnp:OtherReceivablesAndAssetsAbstract
1843 Prepayments for inventories Concept (Monetary) As Of Debit hnp:CurrentPrepaymentsForInventories
1844 Prepaid income tax Concept (Monetary) As Of Debit ifrs-full:CurrentTaxAssetsCurrent
1845 Others Concept (Monetary) As Of Debit hnp:OtherCurrentPrepaymentsNotSeparatelyDisclose
1846 Total prepayments Concept (Monetary) As Of Debit hnp:GrossAmountOfCurrentPrepayments
1847 Less: loss allowance Concept (Monetary) As Of Credit hnp:CurrentPrepaymentsProvisionForDoubtfulAccounts
1848 Total prepayments, net Concept (Monetary) As Of Debit ifrs-full:CurrentPrepayments
1849 Dividends receivable Concept (Monetary) As Of Debit hnp:DividendsReceivable
1850 Receivables from sales of fuel Concept (Monetary) As Of Debit hnp:ReceivablesFromSalesOfFuel
1851 Others Concept (Monetary) As Of Debit hnp:OtherCurrentReceivablesNotSeparatelyDisclose
1852 Subtotal other receivables Concept (Monetary) As Of Debit hnp:GrossAmountOfOtherCurrentReceivables
1853 Less: loss allowance Concept (Monetary) As Of Credit hnp:OtherCurrentReceivablesProvisionForDoubtfulAccounts
1854 Total other receivables, net Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
1855 Profit compensation from Huaneng Group (Note 16) Concept (Monetary) As Of Debit hnp:CurrentAssetRecognisedForExpectedReimbursementContingentLiabilitiesInBusinessCombination
1856 VAT recoverable Concept (Monetary) As Of Debit ifrs-full:CurrentValueAddedTaxReceivables
1857 Financial lease receivables Concept (Monetary) As Of Debit ifrs-full:CurrentFinanceLeaseReceivables
1858 Designated loan to a joint venture Concept (Monetary) As Of Debit hnp:DesignatedLoanToJointVentures
1859 Gross total Concept (Monetary) As Of Debit hnp:OtherReceivablesAndAssetsOtherThanProvisionForDoubtfulAccounts
1860 Net total Concept (Monetary) As Of Debit hnp:OtherReceivablesAndAssets
1861 41801 - Disclosure - Other receivables and assets (Gross amount of other receivables denominated) (Detail) Network

*

*

http://www.hpi.com.cn/role/OtherReceivablesAndAssetsGrossAmountOfOtherReceivablesDenominatedDetail
1862 Gross amounts of other receivables denominated [table] Table

*

*

hnp:GrossAmountsOfOtherReceivablesDenominatedTable
1863 Currencies of other receivables denominated [axis] Axis hnp:CurrenciesOfOtherReceivablesDenominatedAxis
1864 All Currencies [Domain] Member currency:AllCurrenciesDomain
1865 RMB [member] Member currency:CNY
1866 S$ [member] Member currency:SGD
1867 US$ [member] Member currency:USD
1868 PKR [member] Member currency:PKR
1869 Gross amounts of other receivables denominated [line items] LineItems hnp:GrossAmountsOfOtherReceivablesDenominatedLineItems
1870 Gross amounts of other receivables Concept (Monetary) As Of Debit hnp:GrossAmountOfOtherCurrentReceivables
1871 41802 - Disclosure - Other receivables and assets (Movements of other receivables and assets loss allowance) (Detail) Network

*

*

http://www.hpi.com.cn/role/OtherReceivablesAndAssetsMovementsOfOtherReceivablesAndAssetsLossAllowanceDetail
1872 Implied Table Table

*

*

implied:Table
1873 Other receivables and assets [abstract] Abstract hnp:OtherReceivablesAndAssetsAbstract
1874 Beginning of the year Concept (Monetary) As Of Credit hnp:OtherReceivablesAndAssetsProvisionForDoubtfulAccounts
1875 Provision Concept (Monetary) For Period Credit hnp:IncreaseInOtherReceivablesAndAssetsProvisionForDoubtfulAccounts
1876 Reversal/write-off Concept (Monetary) For Period Debit hnp:DecreaseInOtherReceivablesAndAssetsProvisionForDoubtfulAccountsReversalAndWriteOff
1877 End of the year Concept (Monetary) As Of Credit hnp:OtherReceivablesAndAssetsProvisionForDoubtfulAccounts
1878 41900 - Disclosure - Accounts receivable (Detail) Network

*

*

http://www.hpi.com.cn/role/AccountsReceivableDetail
1879 Implied Table Table

*

*

implied:Table
1880 Accounts receivable [abstract] Abstract ifrs-full:TradeAndOtherCurrentReceivablesAbstract
1881 Accounts receivable Concept (Monetary) As Of Debit hnp:GrossAmountsOfCurrentAccountsReceivable
1882 Notes receivable Concept (Monetary) As Of Debit hnp:GrossAmountsOfCurrentNotesReceivable
1883 Gross amounts of account receivables Concept (Monetary) As Of Debit hnp:GrossAmountsOfCurrentTradeReceivables
1884 Less: loss allowance Concept (Monetary) As Of Credit hnp:ImpairmentLossRecognisedInProfitOrLossCurrentTradeReceivables
1885 Total Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
1886 41901 - Disclosure - Accounts receivable (Denominations of gross amounts of account receivable) (Detail) Network

*

*

http://www.hpi.com.cn/role/AccountsReceivableDenominationsOfGrossAmountsOfAccountReceivableDetail
1887 Gross amounts of accounts receivable denominated [table] Table

*

*

hnp:GrossAmountsOfAccountsReceivableDenominatedTable
1888 Currencies of account receivable denominated [axis] Axis hnp:CurrenciesOfAccountReceivableDenominatedAxis
1889 All Currencies [Domain] Member currency:AllCurrenciesDomain
1890 RMB [member] Member currency:CNY
1891 S$ [member] Member currency:SGD
1892 US$ [member] Member currency:USD
1893 PKR [member] Member currency:PKR
1894 Gross amounts of accounts receivable denominated [line items] LineItems hnp:GrossAmountsOfAccountsReceivableDenominatedLineItems
1895 Gross amounts of account receivables Concept (Monetary) As Of Debit hnp:GrossAmountsOfCurrentTradeReceivables
1896 41902 - Disclosure - Accounts receivable (Movements of loss allowance) (Detail) Network

*

*

http://www.hpi.com.cn/role/AccountsReceivableMovementsOfLossAllowanceDetail
1897 Implied Table Table

*

*

implied:Table
1898 Accounts receivable [abstract] Abstract ifrs-full:TradeAndOtherCurrentReceivablesAbstract
1899 Beginning of the year Concept (Monetary) As Of Credit hnp:ImpairmentLossRecognisedInProfitOrLossCurrentTradeReceivables
1900 Provision Concept (Monetary) For Period Credit hnp:ProvisionForCurrentTradeReceivablesDuringCurrentYear
1901 Reversal Concept (Monetary) For Period Debit hnp:ReversalOfProvisionsForCurrentTradeReceivablesDuringCurrentYear
1902 Write-off Concept (Monetary) For Period Debit hnp:WriteOffOfProvisionsForCurrentTradeReceivablesDuringCurrentYear
1903 Currency translation differences Concept (Monetary) For Period Credit hnp:IncreaseDecreaseOfProvisionForCurrentTradeReceivablesDueToCurrencyTranslationDifferences
1904 End of the year Concept (Monetary) As Of Credit hnp:ImpairmentLossRecognisedInProfitOrLossCurrentTradeReceivables
1905 41903 - Disclosure - Accounts receivable (Ageing analysis of accounts receivable) (Detail) Network

*

*

http://www.hpi.com.cn/role/AccountsReceivableAgeingAnalysisOfAccountsReceivableDetail
1906 Ageing analysis of accounts receivable and notes receivable [table] Table

*

*

hnp:AgeingAnalysisOfAccountsReceivableAndNotesReceivableTable
1907 Maturity [axis] Axis ifrs-full:MaturityAxis
1908 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1909 Within 1 year [member] Member ifrs-full:NotLaterThanOneYearMember
1910 Between 1 to 2 years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1911 Between 2 to 3 years [member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1912 Over 3 years [member] Member ifrs-full:LaterThanThreeYearsMember
1913 Ageing analysis of accounts receivable and notes receivable [line items] LineItems hnp:AgeingAnalysisOfAccountsReceivableAndNotesReceivableLineItems
1914 Accounts receivable Concept (Monetary) As Of Debit hnp:GrossAmountsOfCurrentTradeReceivables
1915 41904 - Disclosure - Accounts receivable (Narrative) (Detail) Network

*

*

http://www.hpi.com.cn/role/AccountsReceivableNarrativeDetail
1916 Disclosure of detailed information about accounts receivable [table] Table

*

*

hnp:DisclosureOfDetailedInformationAboutAccountsReceivableTable
1917 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
1918 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
1919 The Company and its subsidiaries except for SinoSing Power [member] Member hnp:OtherSegmentConsolidationItemsMember
1920 SinoSing Power [member] Member hnp:SinosingPowerMember
1921 Major customers [axis] Axis ifrs-full:MajorCustomersAxis
1922 Customers [member] Member ifrs-full:MajorCustomersMember
1923 Domestic local power grid customers [member] Member hnp:DomesticLocalPowerGridCustomersMember
1924 Disclosure of detailed information about accounts receivable [line items] LineItems hnp:DisclosureOfDetailedInformationAboutAccountsReceivableLineItems
1925 Credit period Concept (Text/String) For Period hnp:CreditPeriodGrantedToCustomers
1926 Accounts receivable secured to banks as collateral against loans Concept (Monetary) As Of Debit hnp:AccountsReceivableSecuredToBanksAsCollateralAgainstLoans
1927 The maturity period of the notes receivable Concept (Text/String) For Period hnp:MaturityPeriodOfCurrentNotesReceivable
1928 42000 - Disclosure - Disposal group held for sale (Narrative) (Detail) Network

*

*

http://www.hpi.com.cn/role/DisposalGroupHeldForSaleNarrativeDetail
1929 Disclosure of disposal group held for sale [table] Table

*

*

hnp:DisclosureOfDisposalGroupHeldForSaleTable
1930 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
1931 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
1932 Acquisition from Taishan Power [member] Member hnp:AcquisitionFromTaishanPowerLimitedCompanyMember
1933 Laizhou Wind Power [member] Member hnp:ShandongHuanengLaizhouWindPowerGenerationCoLtdMember
1934 Shareholders [axis] Axis hnp:ShareholdersAxis
1935 Shareholders [member] Member hnp:ShareholdersMember
1936 Shandong Power [member] Member hnp:HuanengShandongPowerGenerationLimitedCompanyMember
1937 Disclosure of disposal group held for sale [line items] LineItems hnp:DisclosureOfDisposalGroupHeldForSaleLineItems
1938 Equity interests entitled to request others to repurchase Concept (Percent) As Of hnp:EquityInterestsEntitledToRequestOthersToRepurchase
1939 Equity interests intended to sell Concept (Percent) As Of hnp:EquityInterestsIntendedToSell
1940 Cumulative income or expenses included in other comprehensive income relating to the disposal group Concept (Monetary) As Of Credit ifrs-full:AmountRecognisedInOtherComprehensiveIncomeAndAccumulatedInEquityRelatingToNoncurrentAssetsOrDisposalGroupsHeldForSale
1941 42001 - Disclosure - Disposal group held for sale (Assets and liabilities comprised in the disposal group held for sale) (Detail) Network

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1942 Disclosure of disposal group held for sale [table] Table

*

*

hnp:DisclosureOfDisposalGroupHeldForSaleTable
1943 Assets and liabilities classified as held for sale [axis] Axis ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis
1944 Assets and liabilities classified as held for sale [member] Member ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleMember
1945 Property, plant and equipment and other non-current assets [member] Member hnp:PropertyPlantAndEquipmentAndOtherNonCurrentAssetsMember
1946 Land use rights [member] Member hnp:LandUseRightsMember
1947 Other non-current assets [member] Member hnp:OtherNonCurrentAssetsMember
1948 Inventories [member] Member hnp:InventoriesMember
1949 Other receivables and assets [member] Member hnp:OtherReceivablesAndAssetsMember
1950 Accounts receivable [member] Member ifrs-full:TradeReceivablesMember
1951 Bank balances and cash [member] Member hnp:BankBalancesAndCashMember
1952 Long-term loans [member] Member hnp:LongTermLoansMember
1953 Accounts payable and other liabilities [member] Member hnp:PayablesAndOtherCurrentLiabilitiesMember
1954 Taxes payables [member] Member hnp:TaxPayablesMember
1955 Short-term loans [member] Member hnp:ShortTermLoansMember
1956 Current portion of long-term loans [member] Member hnp:CurrentPortionOfLongTermLoansMember
1957 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1958 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1959 Shandong Power [member] Member hnp:HuanengShandongPowerGenerationLimitedCompanyMember
1960 Disclosure of disposal group held for sale [line items] LineItems hnp:DisclosureOfDisposalGroupHeldForSaleLineItems
1961 Liabilities held for sale before elimination Concept (Monetary) As Of Credit hnp:LiabilitiesHeldForSaleBeforeElimination
1962 Liabilities from subsidiaries Concept (Monetary) As Of Credit hnp:LiabilitiesFromSubsidiaries
1963 Assets held for sale Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSale
1964 Liabilities held for sale Concept (Monetary) As Of Credit ifrs-full:LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale
1965 42100 - Disclosure - Share capital (Detail) Network

*

*

http://www.hpi.com.cn/role/ShareCapitalDetail
1966 Disclosure of classes of share capital [table] Table

*

*

ifrs-full:DisclosureOfClassesOfShareCapitalTable
1967 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
1968 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
1969 A shares [member] Member hnp:ASharesMember
1970 Overseas listed foreign shares [member] Member hnp:OverseasListedForeignSharesMember
1971 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1972 Number of shares, at the beginning of period Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
1973 Share capital, at the beginning of period Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
1974 Number of shares, issuance of new A shares Concept (Shares) For Period ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding
1975 Share capital, issuance of new A shares Concept (Monetary) For Period Credit hnp:ShareCapitalIssuance
1976 Number of shares, at the end of period Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
1977 Share capital, at the end of period Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
1978 42101 - Disclosure - Share capital (Issuance of new A shares) (Detail) Network

*

*

http://www.hpi.com.cn/role/ShareCapitalIssuanceOfNewASharesDetail
1979 Disclosure of classes of share capital [table] Table

*

*

ifrs-full:DisclosureOfClassesOfShareCapitalTable
1980 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
1981 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
1982 A shares [member] Member hnp:ASharesMember
1983 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1984 Number of shares, issuance of new A shares Concept (Shares) For Period ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding
1985 Par value per share Concept (Share) As Of ifrs-full:ParValuePerShare
1986 Price per share Concept (Share) As Of hnp:IssuePricePerShare
1987 Net proceeds from issuance of new shares Concept (Monetary) For Period Credit hnp:NetProceedsFromIssuanceOfIssuedCapital
1988 42200 - Disclosure - Other equity instruments (Detail) Network

*

*

http://www.hpi.com.cn/role/OtherEquityInstrumentsDetail
1989 Disclosure of information about other equity instruments [table] Table

*

*

hnp:DisclosureOfInformationAboutOtherEquityInstrumentsTable
1990 Classes of entity's own equity instruments [axis] Axis ifrs-full:ClassesOfEntitysOwnEquityInstrumentsAxis
1991 Entity's own equity instruments [member] Member ifrs-full:EntitysOwnEquityInstrumentsMember
1992 Other equity instruments [member] Member ifrs-full:OtherEquityInterestMember
1993 Bond A [member] Member hnp:PerpetualCorporateBondAMember
1994 Bond B [member] Member hnp:PerpetualCorporateBondBMember
1995 Yingda Insurance Financing Plan (1st) [member] Member hnp:FirstTranchOfYingdaInsuranceFinancingPlanMember
1996 Yingda Insurance Financing Plan (2nd) [member] Member hnp:SecondTranchOfYingdaInsuranceFinancingPlanMember
1997 Yingda Insurance Financing Plan (3rd) [member] Member hnp:ThirdTranchOfYingdaInsuranceFinancingPlanMember
1998 Disclosure of information about other equity instruments [line items] LineItems hnp:DisclosureOfInformationAboutOtherEquityInstrumentsLineItems
1999 Issuance Date Concept (Text/String) For Period hnp:IssueDateOtherEquityInstruments
2000 Category Concept (Text/String) For Period hnp:CategoryOfOtherEquityInstruments
2001 Initial distribution rate Concept (Percent) As Of hnp:InitialDistributionRateOtherEquityInstruments
2002 Issue Price Concept (Share) As Of hnp:IssuePricePerShare
2003 Number Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
2004 Par value Concept (Monetary) As Of ifrs-full:NotionalAmount
2005 Initial Period Concept (Text/String) For Period hnp:InitialPeriodOtherEquityInstruments
2006 Conversion Condition Concept (Text/String) For Period hnp:ConversionConditionOtherEquityInstruments
2007 Conversion Result Concept (Text/String) For Period hnp:ConversionResultOtherEquityInstruments
2008 42201 - Disclosure - Other equity instruments (Major Provisions) (Detail) Network

*

*

http://www.hpi.com.cn/role/OtherEquityInstrumentsMajorProvisionsDetail
2009 Disclosure of information about other equity instruments [table] Table

*

*

hnp:DisclosureOfInformationAboutOtherEquityInstrumentsTable
2010 Classes of entity's own equity instruments [axis] Axis ifrs-full:ClassesOfEntitysOwnEquityInstrumentsAxis
2011 Entity's own equity instruments [member] Member ifrs-full:EntitysOwnEquityInstrumentsMember
2012 Other equity instruments [member] Member ifrs-full:OtherEquityInterestMember
2013 Perpetual corporate bonds [member] Member hnp:PerpetualCorporateBondsMember
2014 Bond A [member] Member hnp:PerpetualCorporateBondAMember
2015 Bond B [member] Member hnp:PerpetualCorporateBondBMember
2016 Three tranches of Yingda Insurance Financing Plan [member] Member hnp:ThreeTranchesOfYingdaInsuranceFinancingPlanMember
2017 Period after issuance [axis] Axis hnp:PeriodAfterIssuanceAxis
2018 Period after issuance [member] Member hnp:PeriodAfterIssuanceMember
2019 From the 9th to the 11th year [member] Member hnp:NinthToEleventhYearMember
2020 From the 11th to the 13th year [member] Member hnp:EleventhToThirteenthYearMember
2021 From the 13th year onwards [member] Member hnp:MoreThanThirteenYearsMember
2022 Disclosure of information about other equity instruments [line items] LineItems hnp:DisclosureOfInformationAboutOtherEquityInstrumentsLineItems
2023 Aggregate net proceeds from issuing other equity instruments Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssuingOtherEquityInstruments
2024 Initial distribution rate Concept (Percent) As Of hnp:InitialDistributionRateOtherEquityInstruments
2025 Date can be callable at the Company's discretion in whole or deferred to pay the principal Concept (Text/String) For Period hnp:DateCanBeCallableOrDeferredToPay
2026 Application distribution rate Concept (Text/String) For Period hnp:ApplicationDistributionRateResetOnFirstCallDateAndEachRenewalPeriodAfterFirstCallDate
2027 Profit Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
2028 42202 - Disclosure - Other equity instruments (Changes of perpetual corporate bonds) (Detail) Network

*

*

http://www.hpi.com.cn/role/OtherEquityInstrumentsChangesOfPerpetualCorporateBondsDetail
2029 Disclosure of information about other equity instruments [table] Table

*

*

hnp:DisclosureOfInformationAboutOtherEquityInstrumentsTable
2030 Classes of entity's own equity instruments [axis] Axis ifrs-full:ClassesOfEntitysOwnEquityInstrumentsAxis
2031 Entity's own equity instruments [member] Member ifrs-full:EntitysOwnEquityInstrumentsMember
2032 Other equity instruments [member] Member ifrs-full:OtherEquityInterestMember
2033 Perpetual corporate bonds [member] Member hnp:PerpetualCorporateBondsMember
2034 Bond A [member] Member hnp:PerpetualCorporateBondAMember
2035 Bond B [member] Member hnp:PerpetualCorporateBondBMember
2036 Three tranches of Yingda Insurance Financing Plan [member] Member hnp:ThreeTranchesOfYingdaInsuranceFinancingPlanMember
2037 Yingda Insurance Financing Plan (1st) [member] Member hnp:FirstTranchOfYingdaInsuranceFinancingPlanMember
2038 Yingda Insurance Financing Plan (2nd) [member] Member hnp:SecondTranchOfYingdaInsuranceFinancingPlanMember
2039 Yingda Insurance Financing Plan (3rd) [member] Member hnp:ThirdTranchOfYingdaInsuranceFinancingPlanMember
2040 Disclosure of information about other equity instruments [line items] LineItems hnp:DisclosureOfInformationAboutOtherEquityInstrumentsLineItems
2041 Number, at the beginning of period Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
2042 Amount, at the beginning of period Concept (Monetary) As Of Credit ifrs-full:OtherEquityInterest
2043 Number, Issuance Concept (Shares) For Period hnp:NumberOfSharesOfEquityInstrumentsIncreaseDecreaseInCurrentPeriodNewIssues
2044 Amount, Issuance Concept (Monetary) For Period Credit ifrs-full:IssueOfEquity
2045 Cumulative distributions, Accrual distribution Concept (Monetary) For Period Credit hnp:CumulativeInterestsOfOtherEquityInstrumentsIncreaseDecreaseInCurrentPeriod
2046 Cumulative distributions, Distribution payment Concept (Monetary) For Period Debit hnp:PaymentOfCumulativeDistributionOfOtherEquityInstruments
2047 Number, at the end of period Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
2048 Amount, at the end of period Concept (Monetary) As Of Credit ifrs-full:OtherEquityInterest
2049 42300 - Disclosure - Surplus reserves (Detail) Network

*

*

http://www.hpi.com.cn/role/SurplusReservesDetail
2050 Implied Table Table

*

*

implied:Table
2051 Surplus reserves [abstract] Abstract hnp:SurplusReservesAbstract
2052 Surplus reserves Concept (Monetary) As Of Credit hnp:SurplusReserves
2053 Provision made for statutory surplus reserve Concept (Monetary) For Period Credit hnp:ProvisionMadeForStatutorySurplusReserveInCurrentYear
2054 Provision made to discretionary surplus reserve Concept (Monetary) For Period Credit hnp:ProvisionMadeForDiscretionarySurplusReserveInCurrentYear
2055 42301 - Disclosure - Surplus reserves (Disclosure of retained earnings) (Detail) Network

*

*

http://www.hpi.com.cn/role/SurplusReservesDisclosureOfRetainedEarningsDetail
2056 Disclosure of information of retained earnings [table] Table

*

*

hnp:DisclosureOfInformationOfRetainedEarningsTable
2057 Financial effect of transition from previous GAAP to IFRSs [axis] Axis ifrs-full:FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis
2058 IFRSs [member] Member ifrs-full:IFRSsMember
2059 PRC GAAP [member] Member ifrs-full:PreviousGAAPMember
2060 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2061 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2062 The Company [member] Member ifrs-full:ParentMember
2063 Disclosure of information of retained earnings [line items] LineItems hnp:DisclosureOfInformationOfRetainedEarningsLineItems
2064 Retained earnings Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
2065 42400 - Disclosure - Dividends of ordinary shares and cumulative distribution of other equity instruments (Detail) Network

*

*

http://www.hpi.com.cn/role/DividendsOfOrdinarySharesAndCumulativeDistributionOfOtherEquityInstrumentsDetail
2066 Dividends of ordinary shares and cumulative distribution of other equity instruments [table] Table

*

*

hnp:DividendsOfOrdinarySharesAndCumulativeDistributionOfOtherEquityInstrumentsTable
2067 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
2068 Equity [member] Member ifrs-full:EquityMember
2069 Other equity instruments [member] Member ifrs-full:OtherEquityInterestMember
2070 Dividends of ordinary shares and cumulative distribution of other equity instruments [line items] LineItems hnp:DividendsOfOrdinarySharesAndCumulativeDistributionOfOtherEquityInstrumentsLineItems
2071 Cash dividend per share Concept (Share) For Period ifrs-full:DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwnersPerShare
2072 Total cash dividend Concept (Monetary) For Period ifrs-full:DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwners
2073 Profit Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
2074 Cumulative distribution of other equity instruments Concept (Monetary) For Period Debit hnp:PaymentOfCumulativeDistributionOfOtherEquityInstruments
2075 42500 - Disclosure - Long-term loans (Detail) Network

*

*

http://www.hpi.com.cn/role/LongTermLoansDetail
2076 Disclosure of long-term loans [table] Table

*

*

hnp:DisclosureOfLongTermLoansTable
2077 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
2078 Counterparties [member] Member ifrs-full:CounterpartiesMember
2079 Huaneng Group and its subsidiaries (a) [member] Member hnp:HuanengGroupAndItsSubsidiariesMember
2080 Bank loans and other loans (b) [member] Member hnp:BanksAndOthersMember
2081 Disclosure of long-term loans [line items] LineItems hnp:DisclosureOfLongTermLoansLineItems
2082 Long-term loans Concept (Monetary) As Of Credit hnp:NonCurrentLoansReceived
2083 Less: Current portion Concept (Monetary) As Of Credit hnp:CurrentPortionOfLongTermLoans
2084 Non-current portion Concept (Monetary) As Of Credit ifrs-full:NoncurrentPortionOfNoncurrentLoansReceived
2085 42501 - Disclosure - Long-term loans (Loans from Huaneng Group and its subsidiaries) (Detail) Network

*

*

http://www.hpi.com.cn/role/LongTermLoansLoansFromHuanengGroupAndItsSubsidiariesDetail
2086 Disclosure of long-term loans [table] Table

*

*

hnp:DisclosureOfLongTermLoansTable
2087 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
2088 Counterparties [member] Member ifrs-full:CounterpartiesMember
2089 Huaneng Group and its subsidiaries [member] Member hnp:HuanengGroupAndItsSubsidiariesMember
2090 Huaneng Group [member] Member hnp:HuanengGroupMember
2091 Huaneng Finance [member] Member hnp:ChinaHuanengFinanceCorporationLimitedMember
2092 Huaneng Tiancheng Financial Leasing Co., Ltd. ("Tiancheng Financial Leasing") [member] Member hnp:HuanengTianchengFinancialLeasingCoLtdMember
2093 Types of loans [axis] Axis hnp:TypesOfLoansAxis
2094 Loans [member] Member hnp:LoansMember
2095 Unsecured [member] Member hnp:UnsecuredLoansMember
2096 Secured [member] Member hnp:SecuredLoansMember
2097 Types of original currency [axis] Axis hnp:TypesOfOriginalCurrencyAxis
2098 All Currencies [Domain] Member currency:AllCurrenciesDomain
2099 RMB [member] Member currency:CNY
2100 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
2101 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
2102 Variable rate [member] Member ifrs-full:FloatingInterestRateMember
2103 Disclosure of long-term loans [line items] LineItems hnp:DisclosureOfLongTermLoansLineItems
2104 Long-term loans Concept (Monetary) As Of Credit hnp:NonCurrentLoansReceived
2105 Less: Current portion Concept (Monetary) As Of Credit hnp:CurrentPortionOfLongTermLoans
2106 Non-current portion Concept (Monetary) As Of Credit ifrs-full:NoncurrentPortionOfNoncurrentLoansReceived
2107 Annual interest rate Concept (Text/String) For Period hnp:LongTermLoansInterestRate
2108 42502 - Disclosure - Long-term loans (Bank loans and other loans) (Detail) Network

*

*

http://www.hpi.com.cn/role/LongTermLoansBankLoansAndOtherLoansDetail
2109 Disclosure of long-term loans [table] Table

*

*

hnp:DisclosureOfLongTermLoansTable
2110 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
2111 Counterparties [member] Member ifrs-full:CounterpartiesMember
2112 Bank loans and other loans [member] Member hnp:BanksAndOthersMember
2113 Types of loans [axis] Axis hnp:TypesOfLoansAxis
2114 Loans [member] Member hnp:LoansMember
2115 Secured [member] Member hnp:SecuredLoansMember
2116 Unsecured [member] Member hnp:UnsecuredLoansMember
2117 Types of original currency [axis] Axis hnp:TypesOfOriginalCurrencyAxis
2118 All Currencies [Domain] Member currency:AllCurrenciesDomain
2119 RMB [member] Member currency:CNY
2120 US$ [member] Member currency:USD
2121 S$ [member] Member currency:SGD
2122 EUR [member] Member currency:EUR
2123 JPY [member] Member currency:JPY
2124 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
2125 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
2126 Fixed rate [member] Member ifrs-full:FixedInterestRateMember
2127 Variable rate [member] Member ifrs-full:FloatingInterestRateMember
2128 Disclosure of long-term loans [line items] LineItems hnp:DisclosureOfLongTermLoansLineItems
2129 Long-term loans Concept (Monetary) As Of Credit hnp:NonCurrentLoansReceived
2130 Less: Current portion Concept (Monetary) As Of Credit hnp:CurrentPortionOfLongTermLoans
2131 Non-current portion Concept (Monetary) As Of Credit ifrs-full:NoncurrentPortionOfNoncurrentLoansReceived
2132 Annual interest rate Concept (Text/String) For Period hnp:LongTermLoansInterestRate
2133 42503 - Disclosure - Long-term loans (Narrative) (Detail) Network

*

*

http://www.hpi.com.cn/role/LongTermLoansNarrativeDetail
2134 Disclosure of long-term loans [table] Table

*

*

hnp:DisclosureOfLongTermLoansTable
2135 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
2136 Counterparties [member] Member ifrs-full:CounterpartiesMember
2137 Tiancheng Financial Leasing [member] Member hnp:HuanengTianchengFinancialLeasingCoLtdMember
2138 Other financial leasing companies [member] Member hnp:OtherFinancialLeasingCompaniesMember
2139 Types of loans [axis] Axis hnp:TypesOfLoansAxis
2140 Loans [member] Member hnp:LoansMember
2141 Secured [member] Member hnp:SecuredLoansMember
2142 Type of assets used to secure to loans [axis] Axis hnp:TypeOfAssetsUsedToSecureToLoansAxis
2143 Type of assets used to secure to loans [member] Member hnp:TypeOfAssetsUsedToSecureToLoansMember
2144 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
2145 Future electricity and heat revenue [member] Member hnp:FutureElectricityAndHeatRevenueMember
2146 Disclosure of long-term loans [line items] LineItems hnp:DisclosureOfLongTermLoansLineItems
2147 Long-term loans Concept (Monetary) As Of Credit hnp:NonCurrentLoansReceived
2148 Nominal price of buy back when lease term expires Concept (Monetary) As Of Debit hnp:NominalPriceOfBuyBackWhenLeaseTermExpires
2149 Net book value of property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipmentPledgedAsSecurity
2150 42504 - Disclosure - Long-term loans (Maturity of long-term loans) (Detail) Network

*

*

http://www.hpi.com.cn/role/LongTermLoansMaturityOfLongTermLoansDetail
2151 Disclosure of long-term loans [table] Table

*

*

hnp:DisclosureOfLongTermLoansTable
2152 Maturity [axis] Axis ifrs-full:MaturityAxis
2153 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2154 Within 1 year [member] Member ifrs-full:NotLaterThanOneYearMember
2155 More than 1 year but no more than 2 years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
2156 More than 2 years but no more than 3 years [member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
2157 More than 3 years but no more than 4 years [member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
2158 More than 4 years but no more than 5 years [member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
2159 More than 5 years [member] Member ifrs-full:LaterThanFiveYearsMember
2160 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
2161 Counterparties [member] Member ifrs-full:CounterpartiesMember
2162 Huaneng Group and its subsidiaries [member] Member hnp:HuanengGroupAndItsSubsidiariesMember
2163 Bank loans and other loans [member] Member hnp:BanksAndOthersMember
2164 Disclosure of long-term loans [line items] LineItems hnp:DisclosureOfLongTermLoansLineItems
2165 Long-term loans Concept (Monetary) As Of Credit hnp:NonCurrentLoansReceived
2166 Less: amount due within 1 year included under current liabilities Concept (Monetary) As Of Credit hnp:CurrentPortionOfLongTermLoans
2167 Non-current portion Concept (Monetary) As Of Credit ifrs-full:NoncurrentPortionOfNoncurrentLoansReceived
2168 42505 - Disclosure - Long-term loans (Interest payment schedule of long-term loans in future years) (Detail) Network

*

*

http://www.hpi.com.cn/role/LongTermLoansInterestPaymentScheduleOfLongTermLoansInFutureYearsDetail
2169 Disclosure of long-term loans [table] Table

*

*

hnp:DisclosureOfLongTermLoansTable
2170 Maturity [axis] Axis ifrs-full:MaturityAxis
2171 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2172 Within 1 year [member] Member ifrs-full:NotLaterThanOneYearMember
2173 More than 1 year but no more than 2 years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
2174 More than 2 year but no more than 5 years [member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanFiveYearsMember
2175 More than 5 years [member] Member ifrs-full:LaterThanFiveYearsMember
2176 Disclosure of long-term loans [line items] LineItems hnp:DisclosureOfLongTermLoansLineItems
2177 The interest payment of long-term loans in the future years Concept (Monetary) As Of Credit hnp:EstimatedInterestPaymentOfLongTermLoansInFutureYears
2178 42600 - Disclosure - Long-term bonds (Detail) Network

*

*

http://www.hpi.com.cn/role/LongTermBondsDetail
2179 Disclosure of long-term bonds [table] Table

*

*

hnp:DisclosureOfLongTermBondsTable
2180 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
2181 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
2182 Corporate bonds with maturity of 10 years issued in May 2008 [member] Member hnp:CorporateBondsWithMaturityOf10YearsIssuedInMay2008Member
2183 Medium-term notes with maturity of 5 years issued in July 2014 [member] Member hnp:MediumTermNotesWithMaturityOf5YearsIssuedInJuly2014Member
2184 Corporate bonds issued in June 2016 [member] Member hnp:CorporateBondsIssuedInJune2016Member
2185 Corporate bonds with maturity of 5 years issued in June 2016 [member] Member hnp:CorporateBondsWithMaturityOf5YearsIssuedInJune2016Member
2186 Corporate bonds with maturity of 10 years issued in June 2016 [member] Member hnp:CorporateBondsWithMaturityOf10YearsIssuedInJune2016Member
2187 Medium-term notes with maturity of 5 years issued in July 2017 [member] Member hnp:MediumTermNotesWithMaturityOf5YearsIssuedInJuly2017Member
2188 Debt financing instrument with maturity of 3 years issued in July 2017 [member] Member hnp:DebtFinancingInstrumentWithMaturityOf3YearsIssuedInJuly2017Member
2189 Corporate bonds with maturity of 3 years issued in November 2017 [member] Member hnp:CorporateBondsWithMaturityOf3YearsIssuedInNovember2017Member
2190 Corporate bonds with maturity of 3 years issued in April 2018 [member] Member hnp:CorporateBondsWithMaturityOf3YearsIssuedInApril2018Member
2191 Corporate bonds with maturity of 10 years issued in September 2018 [member] Member hnp:CorporateBondsWithMaturityOf10YearsIssuedInSeptember2018Member
2192 Medium-term notes with maturity of 3 years issued in May 2018 [member] Member hnp:MediumTermNotesWithMaturityOf3YearsIssuedInMay2018Member
2193 Medium-term notes with maturity of 3 years issued in July 2018 [member] Member hnp:MediumTermNotesWithMaturityOf3YearsIssuedInJuly2018Member
2194 Debt financing instrument with maturity of 3 years issued in July 2018 [member] Member hnp:DebtFinancingInstrumentWithMaturityOf3YearsIssuedInJuly2018Member
2195 Disclosure of long-term bonds [line items] LineItems hnp:DisclosureOfLongTermBondsLineItems
2196 Maturity Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
2197 Face value Concept (Monetary) As Of ifrs-full:NotionalAmount
2198 Annual interest rate Concept (Percent) As Of hnp:LongTermBondsInterestRate
2199 Total actual proceeds received Concept (Monetary) For Period Debit hnp:ProceedsFromIssuanceOfNonCurrentBondsIssued
2200 Annual effective interest rates Concept (Percent) For Period hnp:AnnualEffectiveInterestRates
2201 Interest paid per annum Concept (Monetary) For Period Debit hnp:InterestPaidPerAnnum
2202 Interest payable Concept (Monetary) As Of Credit ifrs-full:InterestPayable
2203 42700 - Disclosure - Other non-current liabilities (Detail) Network

*

*

http://www.hpi.com.cn/role/OtherNonCurrentLiabilitiesDetail
2204 Implied Table Table

*

*

implied:Table
2205 Other non-current liabilities [abstract] Abstract hnp:OtherNonCurrentLiabilitiesAbstract
2206 Finance lease payables (a) Concept (Monetary) As Of Credit ifrs-full:MinimumFinanceLeasePaymentsPayableAtPresentValue
2207 Government grants - Environmental subsidies (b) Concept (Monetary) As Of Credit hnp:EnvironmentalSubsidiesFromNonCurrentGovernmentGrants
2208 Government grants - Other government grants Concept (Monetary) As Of Credit hnp:OtherNonCurrentGovernmentGrants
2209 Contract liabilities (c) Concept (Monetary) As Of Credit ifrs-full:NoncurrentContractLiabilities
2210 Other deferred income (c) Concept (Monetary) As Of Credit hnp:OtherNonCurrentDeferredIncome
2211 Others Concept (Monetary) As Of Credit hnp:OtherNonCurrentLiabilitiesOthers
2212 Subtotal Concept (Monetary) As Of Credit hnp:OtherNonCurrentLiabilitiesIncludingCurrentPortion
2213 Current portion of finance lease payables Concept (Monetary) As Of Credit hnp:CurrentPortionOfNonCurrentFinanceLeasePayables
2214 Current portion of other non-current liabilities Concept (Monetary) As Of Credit hnp:CurrentPortionOfOtherNonCurrentLiabilitiesOthers
2215 Subtotal Concept (Monetary) As Of Credit hnp:CurrentPortionOfOtherNonCurrentLiabilities
2216 Total Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentLiabilities
2217 42701 - Disclosure - Other non-current liabilities (Obligation under finance leases) (Detail) Network

*

*

http://www.hpi.com.cn/role/OtherNonCurrentLiabilitiesObligationUnderFinanceLeasesDetail
2218 Disclosure of other non-current liabilities [table] Table

*

*

hnp:DisclosureOfOtherNonCurrentLiabilitiesTable
2219 Maturity [axis] Axis ifrs-full:MaturityAxis
2220 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2221 Within 1 year [member] Member ifrs-full:NotLaterThanOneYearMember
2222 More than 1 year but no more than 2 years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
2223 More than 2 years but no more than 3 years [member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
2224 Over 3 years [member] Member ifrs-full:LaterThanThreeYearsMember
2225 Disclosure of other non-current liabilities [line items] LineItems hnp:DisclosureOfOtherNonCurrentLiabilitiesLineItems
2226 Non-current finance lease liabilities Concept (Monetary) As Of Credit ifrs-full:MinimumFinanceLeasePaymentsPayable
2227 Less: total future interest expense Concept (Monetary) As Of Credit ifrs-full:FutureFinanceChargeOnFinanceLease
2228 Total Concept (Monetary) As Of Credit ifrs-full:MinimumFinanceLeasePaymentsPayableAtPresentValue
2229 Asset-related government grants credited to the statement of comprehensive income Concept (Monetary) For Period Credit hnp:AmountsOfGovernmentGrantsRelatedToAssetsRecognisedInProfitOrLoss
2230 42800 - Disclosure - Accounts payable and other liabilities (Detail) Network

*

*

http://www.hpi.com.cn/role/AccountsPayableAndOtherLiabilitiesDetail
2231 Implied Table Table

*

*

implied:Table
2232 Accounts payable and other liabilities [abstract] Abstract hnp:AccountsPayableAndOtherLiabilitiesAbstract
2233 Accounts and notes payable Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
2234 Payables to contractors for construction Concept (Monetary) As Of Credit hnp:CurrentPayablesToContractorsForConstruction
2235 Retention payables to contractors Concept (Monetary) As Of Credit ifrs-full:CurrentRetentionPayables
2236 Amounts received in advance Concept (Monetary) As Of Credit ifrs-full:CurrentAdvances
2237 Accrued interests Concept (Monetary) As Of Credit hnp:CurrentAccruedInterests
2238 Others Concept (Monetary) As Of Credit hnp:AccountsPayableAndOtherLiabilitiesOthers
2239 Total Concept (Monetary) As Of Credit hnp:AccountsPayableAndOtherLiabilities
2240 Notes payable secured by notes receivable Concept (Monetary) As Of Credit hnp:NotesPayableSecuredByNotesReceivable
2241 42801 - Disclosure - Accounts payable and other liabilities (Carrying amounts of financial liabilities) (Detail) Network

*

*

http://www.hpi.com.cn/role/AccountsPayableAndOtherLiabilitiesCarryingAmountsOfFinancialLiabilitiesDetail
2242 Carrying amounts of financial liabilities [table] Table

*

*

hnp:CarryingAmountsOfCurrentFinancialLiabilitiesTable
2243 Currencies of financial liabilities denominated [axis] Axis hnp:CurrenciesOfCurrentFinancialLiabilitiesDenominatedAxis
2244 All Currencies [Domain] Member currency:AllCurrenciesDomain
2245 RMB [member] Member currency:CNY
2246 S$ [member] Member currency:SGD
2247 US$ [member] Member currency:USD
2248 JPY [member] Member currency:JPY
2249 EUR [member] Member currency:EUR
2250 PKR [member] Member currency:PKR
2251 Carrying amounts of financial liabilities [line items] LineItems hnp:CarryingAmountsOfCurrentFinancialLiabilitiesLineItems
2252 Carrying amounts of financial liabilities (excluding amounts received in advance) included in accounts payable and other liabilities Concept (Monetary) As Of Credit hnp:FinancialLiabilitiesExcludingAmountsReceivedInAdvanceIncludedInAccountsPayableAndOtherLiabilities
2253 42802 - Disclosure - Accounts payable and other liabilities (Ageing analysis of accounts and notes payable) (Detail) Network

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*

http://www.hpi.com.cn/role/AccountsPayableAndOtherLiabilitiesAgeingAnalysisOfAccountsAndNotesPayableDetail
2254 The ageing analysis of accounts and notes payable [table] Table

*

*

hnp:AgeingAnalysisOfAccountsAndNotesPayableTable
2255 Maturity [axis] Axis ifrs-full:MaturityAxis
2256 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2257 Within 1 year [member] Member ifrs-full:NotLaterThanOneYearMember
2258 Between 1 to 2 years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
2259 Over 2 years [member] Member hnp:LaterThanTwoYearsMember
2260 The ageing analysis of accounts and notes payable [line items] LineItems hnp:AgeingAnalysisOfAccountsAndNotesPayableLineItems
2261 Accounts and notes payable Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
2262 42900 - Disclosure - Taxes payable (Detail) Network

*

*

http://www.hpi.com.cn/role/TaxesPayableDetail
2263 Implied Table Table

*

*

implied:Table
2264 Taxes payable [abstract] Abstract hnp:TaxesPayableAbstract
2265 VAT payable Concept (Monetary) As Of Credit ifrs-full:CurrentValueAddedTaxPayables
2266 Income tax payable Concept (Monetary) As Of Credit hnp:IncomeTaxPayable
2267 Others Concept (Monetary) As Of Credit hnp:CurrentTaxesPayableOthers
2268 Total Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
2269 43000 - Disclosure - Short-term bonds (Detail) Network

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*

http://www.hpi.com.cn/role/ShortTermBondsDetail
2270 Disclosure of short-term bonds [table] Table

*

*

hnp:DisclosureOfShortTermBondsTable
2271 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
2272 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
2273 Unsecured super short-term bond with maturity of 180 days issued in October 2017 [member] Member hnp:UnsecuredSuperShortTermBondWithMaturityOf180DaysIssuedInOctober2017Member
2274 Unsecured super short-term bond one with maturity of 180 days issued in November 2017 [member] Member hnp:UnsecuredSuperShortTermBondOneWithMaturityOf180DaysIssuedInNovember2017Member
2275 Unsecured super short-term bond two with maturity of 180 days issued in November 2017 [member] Member hnp:UnsecuredSuperShortTermBondTwoWithMaturityOf180DaysIssuedInNovember2017Member
2276 Unsecured super short-term bond with maturity of 90 days issued in December 2017 [member] Member hnp:UnsecuredSuperShortTermBondWithMaturityOf90DaysIssuedInDecember2017Member
2277 Unsecured super short-term bond with maturity of 90 days issued in February 2018 [member] Member hnp:UnsecuredSuperShortTermBondWithMaturityOf90DaysIssuedInFebruary2018Member
2278 Unsecured super short-term bond with maturity of 90 days issued in March 2018 [member] Member hnp:UnsecuredSuperShortTermBondWithMaturityOf90DaysIssuedInMarch2018Member
2279 Unsecured super short-term bond with maturity of 150 days issued in March 2018 [member] Member hnp:UnsecuredSuperShortTermBondWithMaturityOf150DaysIssuedInMarch2018Member
2280 Unsecured super short-term bond with maturity of 180 days issued in March 2018 [member] Member hnp:UnsecuredSuperShortTermBondWithMaturityOf180DaysIssuedInMarch2018Member
2281 Unsecured super short-term bond one with maturity of 180 days issued in May 2018 [member] Member hnp:UnsecuredSuperShortTermBondOneWithMaturityOf180DaysIssuedInMay2018Member
2282 Unsecured super short-term bond with maturity of 150 days issued in May 2018 [member] Member hnp:UnsecuredSuperShortTermBondWithMaturityOf150DaysIssuedInMay2018Member
2283 Unsecured super short-term bond two with maturity of 180 days issued in May 2018 [member] Member hnp:UnsecuredSuperShortTermBondTwoWithMaturityOf180DaysIssuedInMay2018Member
2284 Unsecured super short-term bond with maturity of 90 days issued in May 2018 [member] Member hnp:UnsecuredSuperShortTermBondWithMaturityOf90DaysIssuedInMay2018Member
2285 Unsecured super short-term bond with maturity of 180 days issued in June 2018 [member] Member hnp:UnsecuredSuperShortTermBondWithMaturityOf180DaysIssuedInJune2018Member
2286 Unsecured super short-term bond with maturity of 90 days issued in August 2018 [member] Member hnp:UnsecuredSuperShortTermBondWithMaturityOf90DaysIssuedInAugust2018Member
2287 Unsecured super short-term bond with maturity of 180 days issued in October 2018 [member] Member hnp:UnsecuredSuperShortTermBondWithMaturityOf180DaysIssuedInOctober2018Member
2288 Unsecured super short-term bond one with maturity of 90 days issued in November 2018 [member] Member hnp:UnsecuredSuperShortTermBondOneWithMaturityOf90DaysIssuedInNovember2018Member
2289 Unsecured super short-term bond one with maturity of 180 days issued in November 2018 [member] Member hnp:UnsecuredSuperShortTermBondOneWithMaturityOf180DaysIssuedInNovember2018Member
2290 Unsecured super short-term bond two with maturity of 180 days issued in November 2018 [member] Member hnp:UnsecuredSuperShortTermBondTwoWithMaturityOf180DaysIssuedInNovember2018Member
2291 Unsecured super short-term bond two with maturity of 90 days issued in November 2018 [member] Member hnp:UnsecuredSuperShortTermBondTwoWithMaturityOf90DaysIssuedInNovember2018Member
2292 Unsecured super short-term bond with maturity of 270 days issued in December 2018 [member] Member hnp:UnsecuredSuperShortTermBondWithMaturityOf270DaysIssuedInDecember2018Member
2293 Disclosure of short-term bonds [line items] LineItems hnp:DisclosureOfShortTermBondsLineItems
2294 Face value Concept (Monetary) As Of ifrs-full:NotionalAmount
2295 Annual interest rate Concept (Percent) As Of hnp:ShortTermBondsInterestRate
2296 Maturity Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
2297 Annual effective interest rates Concept (Percent) For Period hnp:AnnualEffectiveInterestRates
2298 Interest payables Concept (Monetary) As Of Credit ifrs-full:InterestPayable
2299 43100 - Disclosure - Short-term loans (Detail) Network

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*

http://www.hpi.com.cn/role/ShortTermLoansDetail
2300 Disclosure of short-term loans [table] Table

*

*

hnp:DisclosureOfShortTermLoansTable
2301 Types of loans [axis] Axis hnp:TypesOfLoansAxis
2302 Loans [member] Member hnp:LoansMember
2303 Secured [member] Member hnp:SecuredLoansMember
2304 Unsecured [member] Member hnp:UnsecuredLoansMember
2305 Types of original currency [axis] Axis hnp:TypesOfOriginalCurrencyAxis
2306 All Currencies [Domain] Member currency:AllCurrenciesDomain
2307 RMB [member] Member currency:CNY
2308 US$ [member] Member currency:USD
2309 PKR [member] Member currency:PKR
2310 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
2311 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
2312 Fixed rate [member] Member ifrs-full:FixedInterestRateMember
2313 Variable rate [member] Member ifrs-full:FloatingInterestRateMember
2314 Disclosure of short-term loans [line items] LineItems hnp:DisclosureOfShortTermLoansLineItems
2315 Short-term loans Concept (Monetary) As Of Credit hnp:CurrentLoansReceived
2316 Annual interest rate Concept (Text/String) For Period hnp:ShortTermLoansInterestRate
2317 43101 - Disclosure - Short-term loans (Narrative) (Detail) Network

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*

http://www.hpi.com.cn/role/ShortTermLoansNarrativeDetail
2318 Conditions of short-term loans [table] Table

*

*

hnp:ConditionsOfShortTermLoansTable
2319 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2320 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2321 Ruyi Pakistan Energy [member] Member hnp:HuanengShandongRuyiPakistanEnergyPrivateCoLtdMember
2322 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2323 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2324 Huaneng Group and Ruyi Technology Group [member] Member hnp:HuanengGroupAndRuyiTechnologyGroupMember
2325 Shandong Luyi Power International Limited Company ("Luyi Power") [member] Member hnp:ShandongLuyiPowerInternationalLimitedCompanyMember
2326 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
2327 Counterparties [member] Member ifrs-full:CounterpartiesMember
2328 Huaneng Capital Services Co., Ltd. [member] Member hnp:HuanengCapitalServicesCoLtdMember
2329 Huaneng Finance [member] Member hnp:ChinaHuanengFinanceCorporationLimitedMember
2330 Xi'an Thermal Power Research Institute Co., Ltd ("Xi'an Thermal") [member] Member hnp:XianThermalPowerResearchInstituteCoLtdMember
2331 A subsidiary of Huaneng Energy & Communications Holdings Co., Ltd. [member] Member hnp:SubsidiariesOfHuanengEnergyCommunicationsHoldingsCoLtdMember
2332 Conditions of short-term loans [line items] LineItems hnp:ConditionsOfShortTermLoansLineItems
2333 Short-term loans represented the notes receivable that were discounted with resource Concept (Monetary) As Of Credit hnp:CurrentLoansReceivedFromNotesReceivableDiscountedWithRecourse
2334 Short-term loans Concept (Monetary) As Of Credit hnp:CurrentLoansReceived
2335 Short-term loans guaranteed by related parties Concept (Monetary) As Of Credit hnp:CurrentLoansGuaranteedByRelatedParties
2336 Amount of Irrevocable stand-by letter of credit used for guarantee Concept (Monetary) As Of Credit hnp:AmountOfIrrevocableStandByLetterOfCreditUsedForGuarantee
2337 Annual interest rate Concept (Text/String) For Period hnp:ShortTermLoansInterestRate
2338 43200 - Disclosure - Deferred income tax assets and liabilities (Detail) Network

*

*

http://www.hpi.com.cn/role/DeferredIncomeTaxAssetsAndLiabilitiesDetail
2339 Implied Table Table

*

*

implied:Table
2340 Deferred income tax assets and liabilities [abstract] Abstract ifrs-full:DeferredTaxAssetsAndLiabilitiesAbstract
2341 Deferred income tax assets before offsetting Concept (Monetary) As Of Debit hnp:DeferredIncomeTaxAssetsBeforeOffsetting
2342 Offset amount Concept (Monetary) As Of hnp:DeferredTaxOffsetAmount
2343 Deferred income tax assets after offsetting Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
2344 Deferred income tax liabilities before offsetting Concept (Monetary) As Of Credit hnp:DeferredIncomeTaxLiabilitiesBeforeOffsetting
2345 Offset amount Concept (Monetary) As Of hnp:DeferredTaxOffsetAmount
2346 Deferred income tax liabilities after offsetting Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
2347 Net deferred income tax assets and liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
2348 43201 - Disclosure - Deferred income tax assets and liabilities (Gross movement on deferred income tax accounts) (Detail) Network

*

*

http://www.hpi.com.cn/role/DeferredIncomeTaxAssetsAndLiabilitiesGrossMovementOnDeferredIncomeTaxAccountsDetail
2349 Implied Table Table

*

*

implied:Table
2350 Deferred income tax assets and liabilities [abstract] Abstract ifrs-full:DeferredTaxAssetsAndLiabilitiesAbstract
2351 Beginning of the year Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
2352 Adjustment on initial application of IFRS 9 Concept (Monetary) As Of Credit hnp:DeferredIncomeTaxAssetsAndLiabilitiesIncreaseDecreaseThroughChangesInAccountingPolicies
2353 Adjusted balance at the beginning of the year Concept (Monetary) As Of Credit hnp:DeferredTaxLiabilityAssetCarryingAmountImmediatelyAfterInitialApplicationOfIfrs9
2354 Business combination (Note 41) Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset
2355 Disposal of subsidiaries Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughLossOfControlOfSubsidiaryDeferredTaxLiabilityAsset
2356 Credited to profit or loss (Note 34) Concept (Monetary) For Period ifrs-full:DeferredTaxExpenseIncomeRecognisedInProfitOrLoss
2357 Credited to other comprehensive income Concept (Monetary) For Period ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
2358 Currency translation differences Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset
2359 End of the year Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
2360 43202 - Disclosure - Deferred income tax assets and liabilities (Movements in deferred income tax assets without taking into consideration offsetting) (Detail) Network

*

*

http://www.hpi.com.cn/role/DeferredIncomeTaxAssetsAndLiabilitiesMovementsInDeferredIncomeTaxAssetsWithoutTakingIntoConsiderationOffsettingDetail
2361 Disclosure of deferred income tax assets and liabilities [table] Table

*

*

hnp:DisclosureOfDeferredIncomeTaxAssetsAndLiabilitiesTable
2362 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
2363 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
2364 Hedging reserve [member] Member hnp:TemporaryDifferenceHedgingReserveMember
2365 Amortization of land use rights [member] Member hnp:TemporaryDifferenceAmortizationOfLandUseRightsMember
2366 Provision for impairment loss [member] Member hnp:TemporaryDifferenceProvisionForImpairmentLossMember
2367 Depreciation [member] Member hnp:TemporaryDifferenceDepreciationMember
2368 Accrued expenses [member] Member hnp:TemporaryDifferenceAccruedExpensesMember
2369 VAT refunds on purchases of domestically manufactured equipment [member] Member hnp:TemporaryDifferenceValueAddedTaxRefundsOnPurchasesOfDomesticallyManufacturedEquipmentMember
2370 Unused tax losses [member] Member ifrs-full:UnusedTaxLossesMember
2371 Others [member] Member ifrs-full:OtherTemporaryDifferencesMember
2372 Disclosure of deferred income tax assets and liabilities [line items] LineItems hnp:DisclosureOfDeferredIncomeTaxAssetsAndLiabilitiesLineItems
2373 Beginning of the year Concept (Monetary) As Of Debit hnp:DeferredIncomeTaxAssetsBeforeOffsetting
2374 Business combination (Note 41) Concept (Monetary) For Period Debit hnp:IncreaseDecreaseThroughBusinessCombinationsDeferredTaxAssetsPriorToOffset
2375 Disposal of subsidiaries Concept (Monetary) For Period Debit hnp:IncreaseDecreaseThroughLossOfControlOfSubsidiaryDeferredTaxAssetsPriorToOffset
2376 (Charged) /credited to profit or loss Concept (Monetary) For Period Debit hnp:DeferredTaxExpenseIncomeRecognisedInProfitOrLossDeferredTaxAssetsPriorToOffset
2377 Credited to other comprehensive income Concept (Monetary) For Period Debit hnp:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeDeferredTaxAssetsPriorToOffset
2378 Currency translation differences Concept (Monetary) For Period Debit hnp:IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxAssetsPriorToOffset
2379 End of the year Concept (Monetary) As Of Debit hnp:DeferredIncomeTaxAssetsBeforeOffsetting
2380 43203 - Disclosure - Deferred income tax assets and liabilities (Movements in deferred income tax liabilities without taking into consideration offsetting) (Detail) Network

*

*

http://www.hpi.com.cn/role/DeferredIncomeTaxAssetsAndLiabilitiesMovementsInDeferredIncomeTaxLiabilitiesWithoutTakingIntoConsiderationOffsettingDetail
2381 Disclosure of deferred income tax assets and liabilities [table] Table

*

*

hnp:DisclosureOfDeferredIncomeTaxAssetsAndLiabilitiesTable
2382 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
2383 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
2384 Hedging reserve [member] Member hnp:TemporaryDifferenceHedgingReserveMember
2385 Fair value gains [member] Member hnp:TemporaryDifferenceFairValueGainsMember
2386 Amortization of land use rights [member] Member hnp:TemporaryDifferenceAmortizationOfLandUseRightsMember
2387 Depreciation [member] Member hnp:TemporaryDifferenceDepreciationMember
2388 Power generation license [member] Member hnp:TemporaryDifferencePowerGenerationLicenseMember
2389 Mining rights [member] Member hnp:TemporaryDifferenceMiningRightsMember
2390 Territorial water use right [member] Member hnp:TemporaryDifferenceTerritorialWaterUseRightMember
2391 Others [member] Member ifrs-full:OtherTemporaryDifferencesMember
2392 Disclosure of deferred income tax assets and liabilities [line items] LineItems hnp:DisclosureOfDeferredIncomeTaxAssetsAndLiabilitiesLineItems
2393 At end of prior year Concept (Monetary) As Of Credit hnp:DeferredIncomeTaxLiabilitiesBeforeOffsetting
2394 Adjustment on initial application of IFRS 9 Concept (Monetary) As Of Credit hnp:DeferredIncomeTaxAssetsAndLiabilitiesIncreaseDecreaseThroughChangesInAccountingPolicies
2395 Beginning of the year Concept (Monetary) As Of Credit hnp:DeferredIncomeTaxLiabilitiesBeforeOffsettingCarryingAmountImmediatelyAfterInitialApplicationOfIfrs9
2396 Business combination (Note 41) Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilitiesPriorToOffset
2397 Disposal of subsidiaries Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughLossOfControlOfSubsidiaryDeferredTaxLiabilitiesPriorToOffset
2398 Credited to profit or loss Concept (Monetary) For Period Credit hnp:DeferredTaxExpenseIncomeRecognisedInProfitOrLossDeferredTaxLiabilitiesPriorToOffset
2399 Credited /(charged) to other comprehensive income Concept (Monetary) For Period Credit hnp:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeDeferredTaxLiabilitiesPriorToOffset
2400 Currency translation differences Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilitiesPriorToOffset
2401 End of the year Concept (Monetary) As Of Credit hnp:DeferredIncomeTaxLiabilitiesBeforeOffsetting
2402 43204 - Disclosure - Deferred income tax assets and liabilities (Narrative) (Detail) Network

*

*

http://www.hpi.com.cn/role/DeferredIncomeTaxAssetsAndLiabilitiesNarrativeDetail
2403 Disclosure of deferred income tax assets and liabilities [table] Table

*

*

hnp:DisclosureOfDeferredIncomeTaxAssetsAndLiabilitiesTable
2404 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
2405 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
2406 Temporary differences relating to interest in equity method investees [member] Member hnp:TemporaryDifferencesInterestInEquityMethodInvesteesMember
2407 Temporary differences relating to the undistributed profit of a wholly-owned foreign subsidiary [member] Member hnp:TemporaryDifferencesUndistributedProfitOfWhollyOwnedForeignSubsidiariesMember
2408 Disclosure of deferred income tax assets and liabilities [line items] LineItems hnp:DisclosureOfDeferredIncomeTaxAssetsAndLiabilitiesLineItems
2409 Taxable temporary differences Concept (Monetary) As Of ifrs-full:TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesBranchesAndAssociatesAndInterestsInJointVentures
2410 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
2411 43205 - Disclosure - Deferred income tax assets and liabilities (Unrecognised deferred income tax assets in respect of certain deductible temporary differences and accumulated tax losses) (Detail) Network

*

*

http://www.hpi.com.cn/role/DeferredIncomeTaxAssetsAndLiabilitiesUnrecognisedDeferredIncomeTaxAssetsInRespectOfCertainDeductibleTemporaryDifferencesAndAccumulatedTaxLossesDetail
2412 Implied Table Table

*

*

implied:Table
2413 Deferred income tax assets and liabilities [abstract] Abstract ifrs-full:DeferredTaxAssetsAndLiabilitiesAbstract
2414 Deductible temporary differences Concept (Monetary) As Of ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
2415 Unused tax losses Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
2416 Total Concept (Monetary) As Of Debit hnp:DeductibleTemporaryDifferencesAndUnusedTaxLossesForWhichNoDeferredTaxAssetIsRecognised
2417 43206 - Disclosure - Deferred income tax assets and liabilities (Summarized information of expiry dates of tax losses) (Detail) Network

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*

http://www.hpi.com.cn/role/DeferredIncomeTaxAssetsAndLiabilitiesSummarizedInformationOfExpiryDatesOfTaxLossesDetail
2418 Disclosure of deferred income tax assets and liabilities [table] Table

*

*

hnp:DisclosureOfDeferredIncomeTaxAssetsAndLiabilitiesTable
2419 Maturity [axis] Axis ifrs-full:MaturityAxis
2420 Year of expiry [member] Member ifrs-full:AggregatedTimeBandsMember
2421 Not later than one year [member] Member ifrs-full:NotLaterThanOneYearMember
2422 Later than one year and not later than two years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
2423 Later than two years and not later than three years [member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
2424 Later than three years and not later than four years [member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
2425 Later than four years and not later than five years [member] Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
2426 Disclosure of deferred income tax assets and liabilities [line items] LineItems hnp:DisclosureOfDeferredIncomeTaxAssetsAndLiabilitiesLineItems
2427 The tax losses Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
2428 43300 - Disclosure - Additional financial information to consolidated statements of financial position (Detail) Network

*

*

http://www.hpi.com.cn/role/AdditionalFinancialInformationToConsolidatedStatementsOfFinancialPositionDetail
2429 Implied Table Table

*

*

implied:Table
2430 Additional financial information to consolidated statements of financial position [abstract] Abstract hnp:AdditionalFinancialInformationToConsolidatedStatementsOfFinancialPositionAbstract
2431 Net current liabilities Concept (Monetary) As Of Debit ifrs-full:CurrentAssetsLiabilities
2432 Total assets less current liabilities Concept (Monetary) As Of Debit ifrs-full:AssetsLessCurrentLiabilities
2433 43400 - Disclosure - Income tax expense (Detail) Network

*

*

http://www.hpi.com.cn/role/IncomeTaxExpenseDetail
2434 Implied Table Table

*

*

implied:Table
2435 Income tax expense [abstract] Abstract hnp:IncomeTaxExpenseAbstract
2436 Current income tax expense Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncome
2437 Deferred income tax (Note 32) Concept (Monetary) For Period ifrs-full:DeferredTaxExpenseIncomeRecognisedInProfitOrLoss
2438 Total Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
2439 43401 - Disclosure - Income tax expense (Reconciliation of effective income tax rate from notional income tax rate) (Detail) Network

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*

http://www.hpi.com.cn/role/IncomeTaxExpenseReconciliationOfEffectiveIncomeTaxRateFromNotionalIncomeTaxRateDetail
2440 Implied Table Table

*

*

implied:Table
2441 Income tax expense [abstract] Abstract hnp:IncomeTaxExpenseAbstract
2442 Notional tax on profit before income tax expense, calculated at the applicable income tax rates in the countries concerned Concept (Percent) For Period ifrs-full:ApplicableTaxRate
2443 Effect of tax losses not recognised Concept (Percent) For Period ifrs-full:TaxRateEffectOfTaxLosses
2444 Effect of deductible temporary differences not recognised Concept (Percent) For Period hnp:TaxRateEffectOfDeductibleTemporaryDifferencesNotRecognised
2445 Effect of non-taxable income Concept (Percent) For Period ifrs-full:TaxRateEffectOfRevenuesExemptFromTaxation
2446 Effect of non-deductible expenses Concept (Percent) For Period ifrs-full:TaxRateEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
2447 Statutory tax concession Concept (Percent) For Period hnp:TaxRateEffectOfStatutoryTaxConcession
2448 Others Concept (Percent) For Period ifrs-full:OtherTaxRateEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
2449 Effective tax rate Concept (Percent) For Period ifrs-full:AverageEffectiveTaxRate
2450 43402 - Disclosure - Income tax expense (Narrative) (Detail) Network

*

*

http://www.hpi.com.cn/role/IncomeTaxExpenseNarrativeDetail
2451 Detail of income tax expense [table] Table

*

*

hnp:DetailOfIncomeTaxExpenseTable
2452 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
2453 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
2454 Hong Kong [member] Member country:HK
2455 PRC [member] Member country:CN
2456 Singapore [member] Member country:SG
2457 Pakistan [member] Member country:PK
2458 Types of business [axis] Axis hnp:TypesOfBusinessAxis
2459 Types of business [member] Member hnp:TypesOfBusinessMember
2460 Power generation business [member] Member hnp:TypeOfBusinessForPowerGenerationMember
2461 Maintenance service [member] Member hnp:TypeOfBusinessForMaintenanceServicesMember
2462 Detail of income tax expense [line items] LineItems hnp:DetailOfIncomeTaxExpenseLineItems
2463 Profits tax Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
2464 Estimated assessable profits Concept (Monetary) For Period Credit hnp:EstimatedAssessableProfits
2465 Applicable income tax rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
2466 Period of income tax exemption Concept (Text/String) For Period hnp:PeriodOfIncomeTaxExemption
2467 Income tax Concept (Text/String) For Period hnp:IncomeTax
2468 43500 - Disclosure - Earnings per share (Detail) Network

*

*

http://www.hpi.com.cn/role/EarningsPerShareDetail
2469 Implied Table Table

*

*

implied:Table
2470 Earnings per share [abstract] Abstract ifrs-full:EarningsPerShareAbstract
2471 Profit/(loss) from continuing operations attributable to shareholders Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
2472 Less: cumulative distribution of other equity instruments Concept (Monetary) For Period Credit hnp:CumulativeInterestsOfOtherEquityInstrumentsIncreaseDecreaseInCurrentPeriod
2473 Consolidated net profit attributable to ordinary Shareholders of the Company Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity
2474 Weighted average number of the Company's outstanding ordinary shares ('000) Concept (Shares) For Period ifrs-full:WeightedAverageShares
2475 Basic and diluted earnings per share (RMB) Concept (Share) For Period ifrs-full:BasicAndDilutedEarningsLossPerShare
2476 Weighted average number of ordinary shares [abstract] Abstract ifrs-full:WeightedAverageSharesAndAdjustedWeightedAverageSharesAbstract
2477 Issued ordinary shares at the beginning of the year Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
2478 Effect of share issue (Note 21) Concept (Shares) For Period hnp:EffectOfShareIssueOnWeightedAverageNumberOfOrdinaryShares
2479 Weighted average number of ordinary shares at the end of the year Concept (Shares) For Period ifrs-full:WeightedAverageShares
2480 Dilutive effect on earnings per share Concept (Share) For Period hnp:DilutiveEffectOfDilutivePotentialOrdinarySharesOnEarningsPerShare
2481 Dilutive potential ordinary Concept (Shares) For Period hnp:DilutivePotentialOrdinary
2482 43600 - Disclosure - Notes to consolidated statement of cash flows (Detail) Network

*

*

http://www.hpi.com.cn/role/NotesToConsolidatedStatementOfCashFlowsDetail
2483 Implied Table Table

*

*

implied:Table
2484 Consolidated Statements of Cash Flows [abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
2485 Total bank balances and cash Concept (Monetary) As Of Debit hnp:CashAndCashEquivalentsIncludingCashRestricted
2486 Add: cash and cash equivalents transferred to disposal group Concept (Monetary) As Of Debit hnp:CashAndCashEquivalentsTransferredToDisposalGroup
2487 Less: restricted cash Concept (Monetary) As Of Debit ifrs-full:CurrentRestrictedCashAndCashEquivalents
2488 Cash and cash equivalents as at year end Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
2489 43601 - Disclosure - Notes to consolidated statement of cash flows (Currencies of bank balances and cash denominated) (Detail) Network

*

*

http://www.hpi.com.cn/role/NotesToConsolidatedStatementOfCashFlowsCurrenciesOfBankBalancesAndCashDenominatedDetail
2490 Bank balances and cash denominated [table] Table

*

*

hnp:BankBalancesAndCashDenominatedTable
2491 Currencies of bank balances and cash denominated [axis] Axis hnp:CurrenciesOfBankBalancesAndCashDenominatedAxis
2492 All Currencies [Domain] Member currency:AllCurrenciesDomain
2493 RMB [member] Member currency:CNY
2494 S$ [member] Member currency:SGD
2495 US$ [member] Member currency:USD
2496 Others [member] Member hnp:OtherCurrenciesMember
2497 Currencies of bank balances and cash denominated [line items] LineItems hnp:CurrenciesOfBankBalancesAndCashDenominatedLineItems
2498 Bank balances and cash Concept (Monetary) As Of Debit hnp:CashAndCashEquivalentsIncludingCashRestricted
2499 Material non-cash investing and financing transactions Concept (Monetary) For Period Debit hnp:MaterialNonCashInvestingAndFinancingTransactions
2500 43602 - Disclosure - Notes to consolidated statement of cash flows (Changes in group's liabilities from financing activities) (Detail) Network

*

*

http://www.hpi.com.cn/role/NotesToConsolidatedStatementOfCashFlowsChangesInGroupsLiabilitiesFromFinancingActivitiesDetail
2501 Disclosure of reconciliation of liabilities arising from financing activities [table] Table

*

*

ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesTable
2502 Liabilities arising from financing activities [axis] Axis ifrs-full:LiabilitiesArisingFromFinancingActivitiesAxis
2503 Liabilities arising from financing activities [member] Member ifrs-full:LiabilitiesArisingFromFinancingActivitiesMember
2504 Loans (Note25, 31) [member] Member hnp:LoansMember
2505 Bonds (Note26, 30) [member] Member hnp:BondsIssuedMember
2506 Accrued interests (Note 28) [member] Member hnp:AccruedInterestsMember
2507 Cumulative distribution of other equity instrument investments (Note 24) [member] Member hnp:CumulativeDistributionOfOtherEquityInstrumentInvestmentsMember
2508 Finance leases payables (Note 27) [member] Member hnp:FinanceLeasesPayablesMember
2509 Interest rate swaps contracts (liabilities) (Note 14) [member] Member ifrs-full:InterestRateSwapContractMember
2510 Disclosure of reconciliation of liabilities arising from financing activities [line items] LineItems ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems
2511 The group's liabilities from financing activities at the beginning of the year Concept (Monetary) As Of Credit ifrs-full:LiabilitiesArisingFromFinancingActivities
2512 (a) Business combination Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughBusinessCombinationLiabilitiesArisingFromFinancingActivities
2513 (b) Changes from financing cash flows: Abstract hnp:ChangesThroughFinancingCashFlowsLiabilitiesArisingFromFinancingActivitiesAbstract
2514 Proceeds from new bank loans Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughProceedsFromNewBankLoansLiabilitiesArisingFromFinancingActivities
2515 Repayment of bank loans Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughRepaymentOfBankLoansLiabilitiesArisingFromFinancingActivities
2516 Proceeds from new bonds Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughProceedsFromNewBondsLiabilitiesArisingFromFinancingActivities
2517 Repayment of bonds Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughRepaymentOfBondsLiabilitiesArisingFromFinancingActivities
2518 Capital element of finance lease rentals paid Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughCapitalElementOfFinanceLeaseRentalsPaidLiabilitiesArisingFromFinancingActivities
2519 Interest element of finance lease rentals paid Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughInterestElementOfFinanceLeaseRentalsPaidLiabilitiesArisingFromFinancingActivities
2520 Interest paid Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughInterestPaidLiabilitiesArisingFromFinancingActivities
2521 Others Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughOtherFinancingCashFlowsLiabilitiesArisingFromFinancingActivities
2522 (c) Exchange adjustments Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities
2523 (d) Changes in fair value Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInFairValuesLiabilitiesArisingFromFinancingActivities
2524 (e) Other changes: Abstract hnp:OtherChangesInLiabilitiesArisingFromFinancingActivitiesAbstract
2525 New finance leases Concept (Monetary) For Period Credit ifrs-full:IncreaseThroughNewLeasesLiabilitiesArisingFromFinancingActivities
2526 Interest expenses Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughInterestExpensesLiabilitiesArisingFromFinancingActivities
2527 Accrued cumulative distribution of other equity instrument investment Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughAccruedCumulativeDistributionOfOtherEquityInstrumentInvestmentLiabilitiesArisingFromFinancingActivities
2528 Capitalised borrowing costs Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughCapitalisedBorrowingCostsLiabilitiesArisingFromFinancingActivities
2529 Transfer to group held for sale Concept (Monetary) For Period Credit hnp:IncreaseDecreaseThroughTransferToGroupHeldForSaleLiabilitiesArisingFromFinancingActivities
2530 Disposal of subsidiaries Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughObtainingOrLosingControlOfSubsidiariesOrOtherBusinessesLiabilitiesArisingFromFinancingActivities
2531 Others Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities
2532 The group's liabilities from financing activities at the end of the year Concept (Monetary) As Of Credit ifrs-full:LiabilitiesArisingFromFinancingActivities
2533 43700 - Disclosure - Related party balances and transactions (Basic information of related parties) (Detail) Network

*

*

http://www.hpi.com.cn/role/RelatedPartyBalancesAndTransactionsBasicInformationOfRelatedPartiesDetail
2534 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2535 Names of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2536 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2537 Huaneng Group [member] Member hnp:HuanengGroupMember
2538 HIPDC [member] Member hnp:HuanengInternationalPowerDevelopmentCorporationMember
2539 Sichuan Hydropower [member] Member hnp:HuanengSichuanHydropowerCoLtdMember
2540 Hanfeng Power [member] Member hnp:HebeiHanfengPowerGenerationLimitedLiabilityCompanyMember
2541 Huaneng (Tianjing) Coal Gasification Power Generation Co., Ltd. [member] Member hnp:HuanengTianjingCoalGasificationPowerGenerationCoLtdMember
2542 Tiancheng Financial Leasing [member] Member hnp:HuanengTianchengFinancialLeasingCoLtdMember
2543 Huaneng Shidao Bay Nuclear Power Development Co., Ltd. [member] Member hnp:HuanengShidaoBayNuclearPowerDevelopmentCoLtdMember
2544 Huaneng Xiapu Nuclear Power Co., Ltd. [member] Member hnp:HuanengXiapuNuclearPowerCoLtdMember
2545 Huaneng Finance [member] Member hnp:ChinaHuanengFinanceCorporationLimitedMember
2546 Huaneng Group Fuel Company and its subsidiaries [member] Member hnp:HuanengGroupFuelCompanyAndItsSubsidiariesMember
2547 Jilin Zhanyu Wind Power Asset Management Co., Ltd. [member] Member hnp:JilinZhanyuWindPowerAssetManagementCoLtdMember
2548 Chongqing Huaneng Lime Company Limited [member] Member hnp:ChongqingHuanengLimeCompanyLimitedMember
2549 Liaocheng Luxi Fuel Co., Ltd. Company [member] Member hnp:LiaochengLuxiFuelCoLtdCompanyMember
2550 Shanxi Transition and Comprehensive Reform District. Electricity Distribution Co., Ltd. [member] Member hnp:ShanxiTransitionAndComprehensiveReformDistrictElectricityDistributionCoLtdMember
2551 Gucheng Yingdong Electricity Sales Co., Ltd. [member] Member hnp:GuchengYingdongElectricitySalesCoLtdMember
2552 Chongqing Changyao Electricity Sales Co., Ltd [member] Member hnp:ChongqingChangyaoElectricitySalesCoLtdMember
2553 Zhengzhou Airport Xinggang Power Co., Ltd. [member] Member hnp:ZhengzhouAirportXinggangPowerCoLtdMember
2554 Hainan Nuclear [member] Member hnp:HainanNuclearPowerCoLtdMember
2555 Shanghai Time Shipping [member] Member hnp:ShanghaiTimeShippingCoLtdMember
2556 Jiangsu Nantong Power [member] Member hnp:JiangsuNantongPowerGenerationCoLtdMember
2557 Suzhou Sugao Renewables Service Co., Ltd. [member] Member hnp:SuzhouSugaoRenewablesServiceCoLtdMember
2558 Huaneng Yingkou Port Limited Liability Company [member] Member hnp:HuanengYingkouPortLimitedLiabilityCompanyMember
2559 Luyi Power [member] Member hnp:ShandongLuyiPowerInternationalCoLtdMember
2560 Hong Kong Energy and its subsidiaries [member] Member hnp:HuanengShandongRuyiHongKongEnergyCoLtdAndItsSubsidiariesMember
2561 Huaneng Group Clean Energy Technology Research Institute Co., Ltd. [member] Member hnp:HuanengGroupCleanEnergyTechnologyResearchInstituteCoLtdMember
2562 Huaneng Group Hong Kong Limited Company [member] Member hnp:HuanengGroupHongKongLimitedCompanyMember
2563 Beijing Changping Huaneng Training Center [member] Member hnp:BeijingChangpingHuanengTrainingCenterMember
2564 North United Power Co., Ltd. and its subsidiaries [member] Member hnp:NorthUnitedPowerCoLtdAndItsSubsidiariesMember
2565 Huaneng Hulunbuir Energy Development Company Ltd. and its subsidiaries [member] Member hnp:HuanengHulunbuirEnergyDevelopmentCompanyLtdAndItsSubsidiariesMember
2566 Huaneng Tendering Co., Ltd. [member] Member hnp:HuanengTenderingCoLtdMember
2567 Huaneng Ningxia Energy Company Ltd. [member] Member hnp:HuanengNingxiaEnergyCompanyLtdMember
2568 Huaneng Renewables Corporation Limited and its subsidiaries [member] Member hnp:HuanengRenewablesCorporationLimitedAndItsSubsidiariesMember
2569 Huaneng Songyuan Power Co., Ltd. [member] Member hnp:HuanengSongyuanPowerCoLtdMember
2570 Huaneng Nuclear Power Development Company Ltd. [member] Member hnp:HuanengNuclearPowerDevelopmentCompanyLtdMember
2571 Huaneng Lancangjiang Hydropower Co., Inc. and its subsidiaries [member] Member hnp:HuanengLancangjiangHydropowerCoIncAndItsSubsidiariesMember
2572 Huaneng Coal Business Sector Co., Ltd. and its subsidiaries [member] Member hnp:HuanengCoalBusinessSectorCoLtdAndItsSubsidiariesMember
2573 Huaneng Gansu Energy Development Company Ltd. and its subsidiaries [member] Member hnp:HuanengGansuEnergyDevelopmentCompanyLtdAndItsSubsidiariesMember
2574 Huaneng Baishan Coal Gangue Power Generation Co., Ltd. [member] Member hnp:HuanengBaishanCoalGanguePowerGenerationCoLtdMember
2575 Huaneng Carbon Assets Management Company Limited [member] Member hnp:HuanengCarbonAssetsManagementCompanyLimitedMember
2576 Huaneng Property Co., Ltd. and its subsidiaries [member] Member hnp:HuanengPropertyCoLtdAndItsSubsidiariesMember
2577 Huaneng Energy & Communications Holdings Co., Ltd. and its subsidiaries [member] Member hnp:HuanengEnergyCommunicationsHoldingsCoLtdAndItsSubsidiariesMember
2578 Huaneng Tibet Yarlung Zangbo River Hydropower Development & Investment Company Ltd. and its subsidiaries [member] Member hnp:HuanengTibetYarlungZangboRiverHydropowerDevelopmentInvestmentCompanyLtdAndItsSubsidiariesMember
2579 Huaneng Xining Power Co., Ltd. [member] Member hnp:HuanengXiningPowerCoLtdMember
2580 Huaneng Xinjiang Energy Development Company Ltd. and its subsidiaries [member] Member hnp:HuanengXinjiangEnergyDevelopmentCompanyLtdAndItsSubsidiariesMember
2581 Huaneng Capital Services and its subsidiaries [member] Member hnp:HuanengCapitalServicesAndItsSubsidiariesMember
2582 Huaneng Shaanxi Power Generation Limited and its subsidiaries [member] Member hnp:HuanengShaanxiPowerGenerationLimitedAndItsSubsidiariesMember
2583 Huaneng Group Technology Innovation Center [member] Member hnp:HuanengGroupTechnologyInnovationCenterMember
2584 Alltrust Insurance Co., Ltd. [member] Member hnp:AlltrustInsuranceCoLtdMember
2585 Xi'an Thermal and its subsidiaries [member] Member hnp:XianThermalPowerResearchInstituteCoLtdMember
2586 Great Wall Securities Co., Ltd. (Great Wall Securities) [member] Member hnp:GreatWallSecuritiesCoLtdMember
2587 Huaneng Hainan Industry Co., Ltd. [member] Member hnp:HuanengHainanIndustryCoLtdMember
2588 Huaneng Integrated Industries Management Co., Ltd. [member] Member hnp:HuanengIntegratedIndustriesManagementCoLtdMember
2589 Huaneng Shandong Shidao Bay Nuclear Power Co., Ltd. [member] Member hnp:HuanengShandongShidaoBayNuclearPowerCoLtdMember
2590 Huangtai #8 Power Plant [member] Member hnp:HuangtaiNo8PowerPlantMember
2591 Other government-related enterprises [member] Member hnp:OtherGovernmentRelatedEnterprisesMember
2592 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2593 Nature of relationship Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfRelatedPartyRelationship
2594 43701 - Disclosure - Related party balances and transactions (Related party balances) (Cash deposits in related parties) (Detail) Network

*

*

http://www.hpi.com.cn/role/RelatedPartyBalancesAndTransactionsRelatedPartyBalancesCashDepositsInRelatedPartiesDetail
2595 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2596 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2597 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2598 Huaneng Finance [member] Member hnp:ChinaHuanengFinanceCorporationLimitedMember
2599 Great Wall Securities [member] Member hnp:GreatWallSecuritiesCoLtdMember
2600 Range [axis] Axis ifrs-full:RangeAxis
2601 Ranges [member] Member ifrs-full:RangesMember
2602 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
2603 Top of range [member] Member ifrs-full:TopOfRangeMember
2604 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2605 Savings deposit Concept (Monetary) As Of Debit hnp:SavingsDepositInRelatedParties
2606 Annual interest rate Concept (Percent) For Period hnp:AnnualInterestRateForDemandDepositsInRelatedParties
2607 43702 - Disclosure - Related party balances and transactions (Related party balances) (Balances due from related parties) (Detail) Network

*

*

http://www.hpi.com.cn/role/RelatedPartyBalancesAndTransactionsRelatedPartyBalancesBalancesDueFromRelatedPartiesDetail
2608 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2609 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2610 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2611 Huaneng Group [member] Member hnp:HuanengGroupMember
2612 HIPDC [member] Member hnp:HuanengInternationalPowerDevelopmentCorporationMember
2613 Joint ventures [member] Member ifrs-full:JointVenturesWhereEntityIsVenturerMember
2614 Associates [member] Member ifrs-full:AssociatesMember
2615 Subsidiaries of Huaneng Group [member] Member hnp:SubsidiariesOfHuanengGroupMember
2616 Huangtai #8 Power Plant [member] Member hnp:HuangtaiNo8PowerPlantMember
2617 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2618 Provision made on receivable balances from related parties Concept (Monetary) As Of Credit ifrs-full:ProvisionsForDoubtfulDebtsRelatedToOutstandingBalancesOfRelatedPartyTransaction
2619 Due from related party Concept (Monetary) As Of Debit ifrs-full:AmountsReceivableRelatedPartyTransactions
2620 43703 - Disclosure - Related party balances and transactions (Related party balances) (Balances due to related parties) (Detail) Network

*

*

http://www.hpi.com.cn/role/RelatedPartyBalancesAndTransactionsRelatedPartyBalancesBalancesDueToRelatedPartiesDetail
2621 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2622 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2623 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2624 Huaneng Group [member] Member hnp:HuanengGroupMember
2625 HIPDC [member] Member hnp:HuanengInternationalPowerDevelopmentCorporationMember
2626 Joint ventures of the Company [member] Member ifrs-full:JointVenturesWhereEntityIsVenturerMember
2627 Associates [member] Member ifrs-full:AssociatesMember
2628 Subsidiaries of Huaneng Group [member] Member hnp:SubsidiariesOfHuanengGroupMember
2629 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2630 Due to related party Concept (Monetary) As Of Credit ifrs-full:AmountsPayableRelatedPartyTransactions
2631 43704 - Disclosure - Related party balances and transactions (Related party balances) (Narrative) (Detail) Network

*

*

http://www.hpi.com.cn/role/RelatedPartyBalancesAndTransactionsRelatedPartyBalancesNarrativeDetail
2632 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2633 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2634 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2635 Other government-related enterprises [member] Member hnp:OtherGovernmentRelatedEnterprisesMember
2636 Subsidiaries of Huaneng Group [member] Member hnp:SubsidiariesOfHuanengGroupMember
2637 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2638 Long-term loans (including current portion) and short-term loans Concept (Monetary) As Of Credit hnp:LoansReceivedFromRelatedParties
2639 Prepayment for construction materials Concept (Monetary) As Of Debit hnp:PrepaymentForConstructionMaterialsToRelatedParties
2640 43705 - Disclosure - Related party balances and transactions (Related party transactions) (Procurement of goods and receiving services) (Detail) Network

*

*

http://www.hpi.com.cn/role/RelatedPartyBalancesAndTransactionsRelatedPartyTransactionsProcurementOfGoodsAndReceivingServicesDetail
2641 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2642 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2643 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2644 Huaneng Group [member] Member hnp:HuanengGroupMember
2645 HIPDC [member] Member hnp:HuanengInternationalPowerDevelopmentCorporationMember
2646 Subsidiaries of Huaneng Group [member] Member hnp:SubsidiariesOfHuanengGroupMember
2647 Joint ventures of the Company [member] Member ifrs-full:JointVenturesWhereEntityIsVenturerMember
2648 Associates of the Company [member] Member ifrs-full:AssociatesMember
2649 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2650 Purchase of coal and transportation services Concept (Monetary) For Period Debit hnp:PurchaseOfCoalAndTransportationServicesRelatedPartyTransactions
2651 Technical services and engineering contracting services Concept (Monetary) For Period Debit hnp:TechnicalServicesAndEngineeringContractingServicesRelatedPartyTransactions
2652 Entrusting other parties for power generation Concept (Monetary) For Period Debit hnp:EntrustingOtherPartiesForPowerGenerationRelatedPartyTransactions
2653 Purchase of equipment Concept (Monetary) For Period Debit hnp:PurchaseOfEquipmentRelatedPartyTransactions
2654 Purchase of power generation quota Concept (Monetary) For Period Debit hnp:PurchaseOfPowerGenerationQuotaRelatedPartyTransactions
2655 Purchase of heat Concept (Monetary) For Period Debit hnp:PurchaseOfHeatRelatedPartyTransactions
2656 Other purchases Concept (Monetary) For Period Debit hnp:OtherPurchasesRelatedPartyTransactions
2657 43706 - Disclosure - Related party balances and transactions (Related party transactions) (Sales of goods and providing services) (Detail) Network

*

*

http://www.hpi.com.cn/role/RelatedPartyBalancesAndTransactionsRelatedPartyTransactionsSalesOfGoodsAndProvidingServicesDetail
2658 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2659 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2660 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2661 Huaneng Group [member] Member hnp:HuanengGroupMember
2662 HIPDC [member] Member hnp:HuanengInternationalPowerDevelopmentCorporationMember
2663 Subsidiaries of Huaneng Group [member] Member hnp:SubsidiariesOfHuanengGroupMember
2664 Joint ventures of the Company [member] Member ifrs-full:JointVenturesWhereEntityIsVenturerMember
2665 Huangtai #8 Power Plant [member] Member hnp:HuangtaiNo8PowerPlantMember
2666 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2667 Sales of power generation quota Concept (Monetary) For Period Credit hnp:SalesOfPowerGenerationQuotaRelatedPartyTransactions
2668 Sales of goods Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions
2669 Service provided Concept (Monetary) For Period Credit ifrs-full:RevenueFromRenderingOfServicesRelatedPartyTransactions
2670 Other sales Concept (Monetary) For Period Credit hnp:OtherSalesRelatedPartyTransactions
2671 Provision of entrusted power generation Concept (Monetary) For Period Credit hnp:ProvisionOfEntrustedPowerGenerationRelatedPartyTransactions
2672 43707 - Disclosure - Related party balances and transactions (Related party transactions) (Other related party transactions) (Detail) Network

*

*

http://www.hpi.com.cn/role/RelatedPartyBalancesAndTransactionsRelatedPartyTransactionsOtherRelatedPartyTransactionsDetail
2673 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2674 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2675 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2676 HIPDC [member] Member hnp:HuanengInternationalPowerDevelopmentCorporationMember
2677 Subsidiaries of Huaneng Group [member] Member hnp:SubsidiariesOfHuanengGroupMember
2678 Joint ventures of the Company [member] Member ifrs-full:JointVenturesWhereEntityIsVenturerMember
2679 Huaneng Group [member] Member hnp:HuanengGroupMember
2680 Associates of the Company [member] Member ifrs-full:AssociatesMember
2681 Huangtai #8 Power Plant [member] Member hnp:HuangtaiNo8PowerPlantMember
2682 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2683 Rental charge on leasehold Concept (Monetary) For Period ifrs-full:LeasesAsLesseeRelatedPartyTransactions
2684 Rental income from leasehold Concept (Monetary) For Period ifrs-full:LeasesAsLessorRelatedPartyTransactions
2685 Drawdown of loans Concept (Monetary) For Period Credit hnp:DrawdownOfLoansFromRelatedParties
2686 Interest expense on loans Concept (Monetary) For Period Debit hnp:InterestExpenseOnLoansFromRelatedParties
2687 Interest income on loans Concept (Monetary) For Period Credit hnp:InterestIncomeOnLoansToRelatedParties
2688 Capital injection from a subsidiary of Huaneng Group Concept (Monetary) For Period Credit hnp:CapitalInjectionFromRelatedParties
2689 Capital injection Concept (Monetary) For Period Debit hnp:CapitalInjectionToRelatedParties
2690 Pre-construction cost paid by Concept (Monetary) For Period Credit hnp:PreConstructionCostPaidByRelatedParties
2691 Finance lease payments received from Concept (Monetary) For Period Credit hnp:FinanceLeasePaymentsReceivedFromRelatedParties
2692 Interest expense of finance lease Concept (Monetary) For Period Debit hnp:InterestExpenseOfFinanceLeaseFromRelatedParties
2693 Entrusted management fee Concept (Monetary) For Period Debit hnp:EntrustedManagementFeeToRelatedParties
2694 Trusteeship management income Concept (Monetary) For Period Credit hnp:TrusteeshipManagementIncomeFromRelatedParties
2695 Net proceeds received from investee with significant influence Concept (Monetary) For Period Credit hnp:NetProceedsReceivedFromInvesteeWithSignificantInfluence
2696 Finance lease to investee with significant influence Concept (Monetary) For Period Debit hnp:FinanceLeaseToInvesteeWithSignificantInfluence
2697 Interest income from finance lease Concept (Monetary) For Period Credit hnp:InterestIncomeFromFinanceLeaseFromRelatedParties
2698 Receive collateral under loan agreement Concept (Monetary) For Period Credit hnp:ReceiveCollateralUnderLoanAgreementFromRelatedParties
2699 43708 - Disclosure - Related party balances and transactions (Guarantees) (Detail) Network

*

*

http://www.hpi.com.cn/role/RelatedPartyBalancesAndTransactionsGuaranteesDetail
2700 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2701 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2702 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2703 Huaneng Group [member] Member hnp:HuanengGroupMember
2704 HIPDC [member] Member hnp:HuanengInternationalPowerDevelopmentCorporationMember
2705 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2706 Long-term loans guaranteed by related parties Concept (Monetary) As Of Credit hnp:NonCurrentLoansGuaranteedByRelatedParties
2707 Long-term bonds guaranteed by related parties Concept (Monetary) As Of Credit hnp:NonCurrentBondsGuaranteedByRelatedParties
2708 43709 - Disclosure - Related party balances and transactions (Pre-tax benefits and social insurance of key management personnel) (Detail) Network

*

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http://www.hpi.com.cn/role/RelatedPartyBalancesAndTransactionsPreTaxBenefitsAndSocialInsuranceOfKeyManagementPersonnelDetail
2709 Implied Table Table

*

*

implied:Table
2710 Related party balances and transactions [abstract] Abstract ifrs-full:RelatedPartyTransactionsAbstract
2711 Salaries Concept (Monetary) For Period Debit hnp:KeyManagementPersonnelCompensationShortTermEmployeeBenefitsSalaries
2712 Pension Concept (Monetary) For Period Debit hnp:KeyManagementPersonnelCompensationShortTermEmployeeBenefitsPension
2713 Total Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
2714 43710 - Disclosure - Related party balances and transactions (Related party commitments) (Detail) Network

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*

http://www.hpi.com.cn/role/RelatedPartyBalancesAndTransactionsRelatedPartyCommitmentsDetail
2715 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2716 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2717 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2718 Subsidiaries of Huaneng Group [member] Member hnp:SubsidiariesOfHuanengGroupMember
2719 Joint ventures of the Company [member] Member ifrs-full:JointVenturesWhereEntityIsVenturerMember
2720 HIPDC [member] Member hnp:HuanengInternationalPowerDevelopmentCorporationMember
2721 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2722 Capital commitments Concept (Monetary) As Of Credit hnp:ContractualCapitalCommitmentsMadeByEntityRelatedPartyTransactions
2723 Fuel purchase and transportation commitments Concept (Monetary) As Of Credit hnp:ContractualFuelPurchaseAndTransportationCommitmentsMadeByEntityRelatedPartyTransactions
2724 Operating lease commitments Concept (Monetary) As Of Credit hnp:ContractualOperatingLeaseCommitmentsMadeByEntityRelatedPartyTransactions
2725 43800 - Disclosure - Labor cost (Detail) Network

*

*

http://www.hpi.com.cn/role/LaborCostDetail
2726 Disclosure of labor cost [table] Table

*

*

hnp:DisclosureOfLaborCostTable
2727 Labor cost, type [axis] Axis hnp:LaborCostTypeAxis
2728 Labor cost, type [member] Member hnp:LaborCostTypeMember
2729 Publicly administered retirement plan for PRC employees [member] Member hnp:PubliclyAdministeredRetirementPlanForPrcEmployeesMember
2730 Supplementary defined contribution retirement scheme for PRC employees [member] Member hnp:SupplementaryDefinedContributionRetirementSchemeForPrcEmployeesMember
2731 Central provident funds for Singapore employees [member] Member hnp:CentralProvidentFundsForSingaporeEmployeesMember
2732 Housing funds for employees [member] Member hnp:HousingFundsForEmployeesMember
2733 Social insurance for employees [member] Member hnp:SocialInsuranceForEmployeesMember
2734 Range [axis] Axis ifrs-full:RangeAxis
2735 Ranges [member] Member ifrs-full:RangesMember
2736 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
2737 Top of range [member] Member ifrs-full:TopOfRangeMember
2738 Disclosure of labor cost [line items] LineItems hnp:DisclosureOfLaborCostLineItems
2739 Contribution rate of employee benefits to basic salary Concept (Percent) For Period hnp:ContributionRateOfEmployeeBenefitsToBasicSalary
2740 Amount of contributions paid by the Company and its subsidiaries Concept (Monetary) For Period Debit hnp:AmountOfContributionsOfEmployeeBenefitsPaidByCompanyAndItsSubsidiaries
2741 Amount of contributions paid by the Company and its subsidiaries charged to profit or loss Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
2742 43900 - Disclosure - Directors', supervisors' and senior management's emoluments (Detail) Network

*

*

http://www.hpi.com.cn/role/DirectorsSupervisorsAndSeniorManagementsEmolumentsDetail
2743 Pre-tax benefits and social insurance of directors and supervisors [table] Table

*

*

hnp:PreTaxBenefitsAndSocialInsuranceOfDirectorsAndSupervisorsTable
2744 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2745 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2746 Directors and supervisors [member] Member hnp:DirectorsAndSupervisorsMember
2747 Name of director [member] Member hnp:NameOfDirectorMember
2748 Mr. Shu Yinbiao [member] Member hnp:MrShuYinbiaoMember
2749 Mr. Cao Peixi [member] Member hnp:MrCaoPeixiMember
2750 Mr. Guo Junming [member] Member hnp:MrGuoJunmingMember
2751 Mr. Liu Guoyue [member] Member hnp:MrLiuGuoyueMember
2752 Mr. Fan Xiaxia [member] Member hnp:MrFanXiaxiaMember
2753 Mr. Li Shiqi [member] Member hnp:MrLiShiqiMember
2754 Mr. Huang Jian [member] Member hnp:MrHuangJianMember
2755 Mr. Wang Yongxiang [member] Member hnp:MrWangYongxiangMember
2756 Mr. Mi Dabin [member] Member hnp:MrMiDabinMember
2757 Mr. Guo Hongbo [member] Member hnp:MrGuoHongboMember
2758 Mr. Zhu Yousheng [member] Member hnp:MrZhuYoushengMember
2759 Ms. Li Song [member] Member hnp:MsLiSongMember
2760 Mr. Cheng Heng [member] Member hnp:MrChengHengMember
2761 Mr. Lin Chong [member] Member hnp:MrLinChongMember
2762 Mr. Li Zhensheng [member] Member hnp:MrLiZhenshengMember
2763 Mr. Yue Heng [member] Member hnp:MrYueHengMember
2764 Mr. Geng Jianxin [member] Member hnp:MrGengJianxinMember
2765 Mr. Xia Qing [member] Member hnp:MrXiaQingMember
2766 Mr. Xu Mengzhou [member] Member hnp:MrXuMengzhouMember
2767 Mr. Liu Jizhen [member] Member hnp:MrLiuJizhenMember
2768 Mr. Xu Haifeng [member] Member hnp:MrXuHaifengMember
2769 Mr. Zhang Xianzhi [member] Member hnp:MrZhangXianzhiMember
2770 Mr. Zhang Shouwen [member] Member hnp:MrZhangShouwenMember
2771 Name of supervisor [member] Member hnp:NameOfSupervisorMember
2772 Mr. Ye Xiangdong [member] Member hnp:MrYeXiangdongMember
2773 Mr. Mu Xuan [member] Member hnp:MrMuXuanMember
2774 Ms. Zhang Mengjiao [member] Member hnp:MsZhangMengjiaoMember
2775 Mr. Gu Jianguo [member] Member hnp:MrGuJianguoMember
2776 Ms. Zhang Xiaojun [member] Member hnp:MsZhangXiaojunMember
2777 Mr. Zhu Daqing [member] Member hnp:MrZhuDaqingMember
2778 Mr. Zhang Xiancheng [member] Member hnp:MrZhangXianchengMember
2779 Mr. Wang Zhaobin [member] Member hnp:MrWangZhaobinMember
2780 Ms. Zhang Ling [member] Member hnp:MsZhangLingMember
2781 Pre-tax benefits and social insurance of directors and supervisors [line items] LineItems hnp:PreTaxBenefitsAndSocialInsuranceOfDirectorsAndSupervisorsLineItems
2782 Fees Concept (Monetary) For Period Debit hnp:KeyManagementPersonnelCompensationShortTermEmployeeBenefitsFees
2783 Basic salaries Concept (Monetary) For Period Debit hnp:KeyManagementPersonnelCompensationShortTermEmployeeBenefitsBasicSalaries
2784 Performance salaries Concept (Monetary) For Period Debit hnp:KeyManagementPersonnelCompensationShortTermEmployeeBenefitsPerformanceSalaries
2785 Pension Concept (Monetary) For Period Debit hnp:KeyManagementPersonnelCompensationShortTermEmployeeBenefitsPension
2786 Total Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
2787 Option granted to the directors and supervisors Concept (Shares) For Period hnp:NumberOfOptionGrantedToDirectorsAndSupervisors
2788 Emolument as an inducement to join or upon joining the Company or as compensation for loss of office Concept (Monetary) For Period Debit hnp:EmolumentAsInducementToJoinOrUponJoiningCompanyOrAsCompensationForLossOfOffice
2789 Number of directors and supervisors waived or agreed to waive emoluments Concept (Integer) For Period hnp:NumberOfDirectorsAndSupervisorsWaivedOrAgreedToWaiveEmoluments
2790 43901 - Disclosure - Directors', supervisors' and senior management's emoluments (Five highest paid individuals) (Detail) Network

*

*

http://www.hpi.com.cn/role/DirectorsSupervisorsAndSeniorManagementsEmolumentsFiveHighestPaidIndividualsDetail
2791 Five highest paid individuals [table] Table

*

*

hnp:FiveHighestPaidIndividualsTable
2792 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2793 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2794 Five highest paid individuals [member] Member hnp:FiveHighestPaidIndividualsMember
2795 Range [axis] Axis ifrs-full:RangeAxis
2796 Ranges [member] Member ifrs-full:RangesMember
2797 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
2798 Top of range [member] Member ifrs-full:TopOfRangeMember
2799 Five highest paid individuals [line items] LineItems hnp:FiveHighestPaidIndividualsLineItems
2800 Number of directors Concept (Integer) As Of hnp:NumberOfDirectorsInFiveHighestPaidIndividuals
2801 Number of non-directors Concept (Integer) As Of hnp:NumberOfNonDirectorsInFiveHighestPaidIndividuals
2802 Emoluments payable to each person of five highest paid individuals Concept (Decimal) As Of hnp:EmolumentsPayableToEachPersonOfFiveHighestPaidIndividuals
2803 Basic salaries Concept (Monetary) For Period Debit hnp:KeyManagementPersonnelCompensationShortTermEmployeeBenefitsBasicSalaries
2804 Performance salaries Concept (Monetary) For Period Debit hnp:KeyManagementPersonnelCompensationShortTermEmployeeBenefitsPerformanceSalaries
2805 Pension Concept (Monetary) For Period Debit hnp:KeyManagementPersonnelCompensationShortTermEmployeeBenefitsPension
2806 Total Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
2807 44000 - Disclosure - Commitments (Capital commitments) (Detail) Network

*

*

http://www.hpi.com.cn/role/CommitmentsCapitalCommitmentsDetail
2808 Implied Table Table

*

*

implied:Table
2809 Commitments [abstract] Abstract hnp:CommitmentsAbstract
2810 Contracted but not provided Concept (Monetary) As Of Credit ifrs-full:ContractualCapitalCommitments
2811 44001 - Disclosure - Commitments (Operating lease commitments) (Detail) Network

*

*

http://www.hpi.com.cn/role/CommitmentsOperatingLeaseCommitmentsDetail
2812 Disclosure of operating lease commitments [table] Table

*

*

hnp:DisclosureOfOperatingLeaseCommitmentsTable
2813 Maturity [axis] Axis ifrs-full:MaturityAxis
2814 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2815 Not later than one year [member] Member ifrs-full:NotLaterThanOneYearMember
2816 Later than one year and not later than two years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
2817 Later than two years and not later than five years [member] Member ifrs-full:LaterThanTwoYearsAndNotLaterThanFiveYearsMember
2818 Later than five years [member] Member ifrs-full:LaterThanFiveYearsMember
2819 Disclosure of operating lease commitments [line items] LineItems hnp:DisclosureOfOperatingLeaseCommitmentsLineItems
2820 Total future minimum lease payments under non-cancelable operating leases Concept (Monetary) As Of Credit ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
2821 44002 - Disclosure - Commitments (Operating lease commitments) (Narrative) (Detail) Network

*

*

http://www.hpi.com.cn/role/CommitmentsOperatingLeaseCommitmentsNarrativeDetail
2822 Disclosure of operating lease commitments [table] Table

*

*

hnp:DisclosureOfOperatingLeaseCommitmentsTable
2823 Types of contracts [axis] Axis ifrs-full:TypesOfContractsAxis
2824 Types of contracts [member] Member ifrs-full:TypesOfContractsMember
2825 Land operating lease agreement signed by Huaneng Dezhou Power Plant and Shandong Land Bureau [member] Member hnp:LandOperatingLeaseAgreementSignedByHuanengDezhouPowerPlantAndShandongLandBureauMember
2826 Disclosure of operating lease commitments [line items] LineItems hnp:DisclosureOfOperatingLeaseCommitmentsLineItems
2827 Duration of contracts Concept (Text/String) For Period hnp:DurationOfContracts
2828 Increment for each rental revision of the previous annual rental amount Concept (Percent) For Period hnp:MaximumIncrementRateOfAnnualRentalAmountComparedToPreviousYear
2829 Original annual rentals Concept (Monetary) For Period Debit hnp:OriginalAnnualRentals
2830 Revised annual rentals Concept (Monetary) For Period Debit hnp:RevisedAnnualRentals
2831 44003 - Disclosure - Commitments (Fuel purchase commitments) (Detail) Network

*

*

http://www.hpi.com.cn/role/CommitmentsFuelPurchaseCommitmentsDetail
2832 Disclosure of information about fuel purchase commitments [table] Table

*

*

hnp:DisclosureOfInformationAboutFuelPurchaseCommitmentsTable
2833 Fuel purchase commitments [axis] Axis hnp:FuelPurchaseCommitmentsAxis
2834 Fuel purchase commitments [member] Member hnp:FuelPurchaseCommitmentsMember
2835 Government-related enterprise one, agreement one [member] Member hnp:GovernmentRelatedEnterpriseOneAgreementOneMember
2836 Government-related enterprise two, agreement one [member] Member hnp:GovernmentRelatedEnterpriseTwoAgreementOneMember
2837 Government-related enterprise two, agreement two [member] Member hnp:GovernmentRelatedEnterpriseTwoAgreementTwoMember
2838 Government-related enterprise two, agreement three [member] Member hnp:GovernmentRelatedEnterpriseTwoAgreementThreeMember
2839 Government-related enterprise two, agreement four [member] Member hnp:GovernmentRelatedEnterpriseTwoAgreementFourMember
2840 Government-related enterprise two, agreement five [member] Member hnp:GovernmentRelatedEnterpriseTwoAgreementFiveMember
2841 Government-related enterprise three, agreement one [member] Member hnp:GovernmentRelatedEnterpriseThreeAgreementOneMember
2842 Other suppliers, agreement one [member] Member hnp:OtherSuppliersAgreementOneMember
2843 Other suppliers, agreement two [member] Member hnp:OtherSuppliersAgreementTwoMember
2844 Other suppliers, agreement three [member] Member hnp:OtherSuppliersAgreementThreeMember
2845 Other suppliers, agreement four [member] Member hnp:OtherSuppliersAgreementFourMember
2846 Other suppliers, agreement five [member] Member hnp:OtherSuppliersAgreementFiveMember
2847 Other suppliers, agreement six [member] Member hnp:OtherSuppliersAgreementSixMember
2848 Disclosure on purchase commitments by suppliers [line items] LineItems hnp:DisclosureOnPurchaseCommitmentsBySuppliersLineItems
2849 Periods Concept (Text/String) For Period hnp:PeriodsCoveredByAgreement
2850 Purchase quantities Concept (Text/String) For Period hnp:EstimatedPurchaseQuantitiesInFuelPurchaseCommitments
2851 Estimated unit costs (RMB) Concept (Text/String) For Period hnp:EstimatedUnitCostsInFuelPurchaseCommitments
2852 44100 - Disclosure - Business combinations (Acquisition from Taishan Power) (Narrative) (Detail) Network

*

*

http://www.hpi.com.cn/role/BusinessCombinationsAcquisitionFromTaishanPowerNarrativeDetail
2853 Disclosure of detailed information about business combination [table] Table

*

*

ifrs-full:DisclosureOfBusinessCombinationsTable
2854 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
2855 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
2856 Acquisition from Taishan Power [member] Member hnp:AcquisitionFromTaishanPowerLimitedCompanyMember
2857 Laizhou Wind Power [member] Member hnp:ShandongHuanengLaizhouWindPowerGenerationCoLtdMember
2858 Shandong Laiwu Thermal Power [member] Member hnp:ShandongHuanengLaiwuThermalPowerCoLtdMember
2859 Shandong Liaocheng Thermal Power [member] Member hnp:ShandongHuanengLiaochengThermalPowerCoLtdMember
2860 Shareholders [axis] Axis hnp:ShareholdersAxis
2861 Shareholders [member] Member hnp:ShareholdersMember
2862 Shandong Power [member] Member hnp:HuanengShandongPowerGenerationLimitedCompanyMember
2863 Disclosure of detailed information about business combination [line items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
2864 Equity interests acquired by the Company Concept (Percent) As Of ifrs-full:PercentageOfVotingEquityInterestsAcquired
2865 Revenue Concept (Monetary) For Period Credit ifrs-full:RevenueOfAcquiree
2866 Net loss Concept (Monetary) For Period Credit ifrs-full:ProfitLossOfAcquiree
2867 Goodwill expected to be deductible for tax purposes Concept (Monetary) As Of Debit ifrs-full:GoodwillExpectedDeductibleForTaxPurposes
2868 Acquisition related cost Concept (Monetary) For Period Debit ifrs-full:AcquisitionrelatedCostsRecognisedAsExpenseForTransactionRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombination
2869 44101 - Disclosure - Business combinations (Acquisition from Taishan Power) (Detail) Network

*

*

http://www.hpi.com.cn/role/BusinessCombinationsAcquisitionFromTaishanPowerDetail
2870 Disclosure of detailed information about business combination [table] Table

*

*

ifrs-full:DisclosureOfBusinessCombinationsTable
2871 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
2872 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
2873 Acquisition from Taishan Power [member] Member hnp:AcquisitionFromTaishanPowerLimitedCompanyMember
2874 Disclosure of detailed information about business combination [line items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
2875 Total consideration Concept (Monetary) As Of Credit ifrs-full:CashTransferred
2876 Non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate
2877 Less: Fair value of total identifiable net assets Concept (Monetary) As Of Debit ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
2878 Goodwill Concept (Monetary) As Of Debit ifrs-full:GoodwillRecognisedAsOfAcquisitionDate
2879 Total consideration Concept (Monetary) As Of Credit ifrs-full:CashTransferred
2880 Less: Bank balances and cash of acquirees Concept (Monetary) As Of Debit hnp:CashAndCashEquivalentsIncludingCashRestrictedRecognisedAsOfAcquisitionDate
2881 Cash consideration paid for acquisition of subsidiaries, net of cash acquired Concept (Monetary) For Period Credit hnp:CashConsiderationPaidForAcquisitionOfSubsidiariesNetOfCashAcquiredClassifiedAsInvestingActivities
2882 44102 - Disclosure - Business combinations (Acquisition from Taishan Power) (Assets and liabilities arising from acquisitions) (Detail) Network

*

*

http://www.hpi.com.cn/role/BusinessCombinationsAcquisitionFromTaishanPowerAssetsAndLiabilitiesArisingFromAcquisitionsDetail
2883 Disclosure of detailed information about business combination [table] Table

*

*

ifrs-full:DisclosureOfBusinessCombinationsTable
2884 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
2885 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
2886 Acquisition from Taishan Power [member] Member hnp:AcquisitionFromTaishanPowerLimitedCompanyMember
2887 Laizhou Wind Power [member] Member hnp:ShandongHuanengLaizhouWindPowerGenerationCoLtdMember
2888 Shandong Laiwu Thermal Power [member] Member hnp:ShandongHuanengLaiwuThermalPowerCoLtdMember
2889 Shandong Liaocheng Thermal Power [member] Member hnp:ShandongHuanengLiaochengThermalPowerCoLtdMember
2890 Assets and liabilities [axis] Axis ifrs-full:AssetsAndLiabilitiesAxis
2891 Assets and liabilities [member] Member ifrs-full:AssetsAndLiabilitiesMember
2892 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
2893 Land use rights [member] Member hnp:LandUseRightsMember
2894 Other non-current assets [member] Member hnp:OtherNonCurrentAssetsMember
2895 Inventories [member] Member hnp:InventoriesMember
2896 Other receivables and assets [member] Member hnp:OtherReceivablesAndAssetsMember
2897 Accounts receivable [member] Member ifrs-full:TradeReceivablesMember
2898 Bank balances and cash [member] Member hnp:BankBalancesAndCashMember
2899 Long-term loans [member] Member hnp:LongTermLoansMember
2900 Deferred income tax liabilities [member] Member hnp:DeferredIncomeTaxLiabilitiesMember
2901 Other non-current liabilities [member] Member hnp:OtherNonCurrentLiabilitiesMember
2902 Accounts payable and other liabilities [member] Member hnp:PayablesAndOtherCurrentLiabilitiesMember
2903 Taxes payables [member] Member hnp:TaxPayablesMember
2904 Short-term loans [member] Member hnp:ShortTermLoansMember
2905 Current portion of long-term loans [member] Member hnp:CurrentPortionOfLongTermLoansMember
2906 Disclosure of detailed information about business combination [line items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
2907 Total identifiable net assets, Fair Value Concept (Monetary) As Of Debit ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
2908 44103 - Disclosure - Business combinations (Subsidiary transferred from joint venture) (Detail) Network

*

*

http://www.hpi.com.cn/role/BusinessCombinationsSubsidiaryTransferredFromJointVentureDetail
2909 Disclosure of detailed information about business combination [table] Table

*

*

ifrs-full:DisclosureOfBusinessCombinationsTable
2910 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
2911 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
2912 Hong Kong Energy [member] Member hnp:HuanengShandongRuyiHongKongEnergyCoLtdMember
2913 Shareholders [axis] Axis hnp:ShareholdersAxis
2914 Shareholders [member] Member hnp:ShareholdersMember
2915 A subsidiary of the Company [member] Member hnp:SubsidiariesOfCompanyMember
2916 The other shareholder of Hong Kong Energy [member] Member hnp:ShareholdersOfHuanengShandongRuyiHongKongEnergyCoLtdMember
2917 Disclosure of detailed information about business combination [line items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
2918 Equity interests held by non-controlling shareholder Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
2919 Non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate
2920 Fair value of pre-existing interest in subsidiaries Concept (Monetary) As Of Credit ifrs-full:AcquisitiondateFairValueOfEquityInterestInAcquireeHeldByAcquirerImmediatelyBeforeAcquisitionDate
2921 Less: Fair value of total identifiable net assets Concept (Monetary) As Of Debit ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
2922 Goodwill Concept (Monetary) As Of Debit ifrs-full:GoodwillRecognisedAsOfAcquisitionDate
2923 44104 - Disclosure - Business combinations (Subsidiary transferred from joint venture) (Identifiable assets and liabilities of acquiree as at acquisition date) (Detail) Network

*

*

http://www.hpi.com.cn/role/BusinessCombinationsSubsidiaryTransferredFromJointVentureIdentifiableAssetsAndLiabilitiesOfAcquireeAsAtAcquisitionDateDetail
2924 Disclosure of detailed information about business combination [table] Table

*

*

ifrs-full:DisclosureOfBusinessCombinationsTable
2925 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
2926 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
2927 Shanxi Xiaoyi Energy [member] Member hnp:ShanxiXiaoyiEconomicDevelopmentZoneHuanengEnergyServiceCoLtdMember
2928 Hong Kong Energy [member] Member hnp:HuanengShandongRuyiHongKongEnergyCoLtdMember
2929 Assets and liabilities [axis] Axis ifrs-full:AssetsAndLiabilitiesAxis
2930 Assets and liabilities [member] Member ifrs-full:AssetsAndLiabilitiesMember
2931 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
2932 Deferred income tax assets [member] Member hnp:DeferredIncomeTaxAssetsMember
2933 Other non-current assets [member] Member hnp:OtherNonCurrentAssetsMember
2934 Inventories [member] Member hnp:InventoriesMember
2935 Other receivables and assets [member] Member hnp:OtherReceivablesAndAssetsMember
2936 Accounts receivable [member] Member ifrs-full:TradeReceivablesMember
2937 Bank balances and cash [member] Member hnp:BankBalancesAndCashMember
2938 Long-term loans [member] Member hnp:LongTermLoansMember
2939 Other non-current liabilities [member] Member hnp:OtherNonCurrentLiabilitiesMember
2940 Accounts payable and other liabilities [member] Member hnp:PayablesAndOtherCurrentLiabilitiesMember
2941 Taxes payables [member] Member hnp:TaxPayablesMember
2942 Short-term loans [member] Member hnp:ShortTermLoansMember
2943 Current portion of long-term loans [member] Member hnp:CurrentPortionOfLongTermLoansMember
2944 Disclosure of detailed information about business combination [line items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
2945 Total identifiable net assets, Fair Value Concept (Monetary) As Of Debit ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
2946 44200 - Disclosure - Non-controlling interests (Detail) Network

*

*

http://www.hpi.com.cn/role/NonControllingInterestsDetail
2947 Disclosure of information related to each of the Company and subsidiaries that have material non-controlling interests [table] Table

*

*

hnp:DisclosureOfInformationRelatedToEachOfCompanyAndSubsidiariesThatHaveMaterialNonControllingInterestsTable
2948 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2949 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2950 Qinbei Power [member] Member hnp:HuanengQinbeiPowerGenerationCoLtdMember
2951 Beijing Co-generation [member] Member hnp:HuanengBeijingCoGenerationLimitedLiabilityCompanyMember
2952 Luohuang Power [member] Member hnp:LuohuangPowerCompanyMember
2953 Weihai Power [member] Member hnp:HuanengWeihaiPowerGenerationLimitedLiabilityCompanyMember
2954 Jinling Power [member] Member hnp:JinlingPowerCompanyMember
2955 Yueyang Power [member] Member hnp:HuanengHunanYueyangPowerGenerationLimitedLiabilityCompanyMember
2956 Shidongkou Power [member] Member hnp:HuanengShanghaiShidongkouPowerGenerationLimitedLiabilityCompanyMember
2957 Yangliuqing Co-generation [member] Member hnp:TianjinHuanengYangliuqingCoGenerationLimitedLiabilityCompanyMember
2958 Shandong Power [member] Member hnp:HuanengShandongPowerGenerationLimitedCompanyMember
2959 Other individually immaterial subsidiaries [member] Member hnp:OtherIndividuallyImmaterialSubsidiariesMember
2960 Disclosure of the information relating to each of the Company and subsidiaries that have material non-controlling interests [line items] LineItems hnp:DisclosureOfInformationRelatingToEachOfCompanyAndSubsidiariesThatHaveMaterialNonControllingInterestsLineItems
2961 NCI percentage Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
2962 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
2963 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
2964 Non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
2965 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
2966 Net assets Concept (Monetary) As Of Debit ifrs-full:NetAssetsLiabilities
2967 Carrying amount of NCI Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
2968 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
2969 Net (loss)/profit Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
2970 Total comprehensive (loss)/income Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
2971 (Loss)/profit allocated to NCI Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
2972 Other comprehensive income/ (loss) allocated to NCI Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeAttributableToNoncontrollingInterests
2973 Cash flow from operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
2974 Cash flow from investment activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
2975 Cash flow from financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
2976 Net increase/ (decrease) in cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
2977 Dividends paid to NCI Concept (Monetary) For Period Credit ifrs-full:DividendsPaidToNoncontrollingInterests
2978 44300 - Disclosure - Subsequent events (Guarantee agreement) (Detail) Network

*

*

http://www.hpi.com.cn/role/SubsequentEventsGuaranteeAgreementDetail
2979 Disclosure of non-adjusting events after reporting period [table] Table

*

*

ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable
2980 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
2981 Counterparties [member] Member ifrs-full:CounterpartiesMember
2982 Industrial and Commercial Bank of China Limited [member] Member hnp:IndustrialAndCommercialBankOfChinaLimitedMember
2983 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2984 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2985 Ruyi Pakistan Energy [member] Member hnp:HuanengShandongRuyiPakistanEnergyPrivateCoLtdMember
2986 Disclosure of non-adjusting events after reporting period [line items] LineItems ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
2987 Amount of guarantee for short-term loans Concept (Monetary) As Of Credit hnp:AmountOfGuaranteeForShortTermLoans
2988 Short-term loans Concept (Monetary) As Of Credit hnp:CurrentLoansReceived
2989 44301 - Disclosure - Subsequent events (Super short-term bonds) (Detail) Network

*

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http://www.hpi.com.cn/role/SubsequentEventsSuperShortTermBondsDetail
2990 Disclosure of non-adjusting events after reporting period [table] Table

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ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable
2991 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
2992 Non-adjusting events [member] Member ifrs-full:NonadjustingEventsMember
2993 Issue super short-term bonds [member] Member hnp:IssueSuperShortTermBondsMember
2994 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
2995 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
2996 Super short-term bond with maturity of 90 days issued in March 2019 [member] Member hnp:SuperShortTermBondWithMaturityOf90DaysIssuedInMarch2019Member
2997 Disclosure of non-adjusting events after reporting period [line items] LineItems ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
2998 Face value Concept (Monetary) As Of ifrs-full:NotionalAmount
2999 Annual interest rate Concept (Percent) As Of hnp:ShortTermBondsInterestRate
3000 Maturity Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
3001 Par value Concept (Share) As Of ifrs-full:ParValuePerShare

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