ALUMINUM CORP OF CHINA LTD (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line	Label	Object Class	Period Type	Balance	Report ElementName
1	00090 - Document - Document and Entity Information	Network	*	*	http://www.chalco.com.cn/role/DocumentDocumentAndEntityInformation
2	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
3	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
4	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
5	Domestic Shares	Member			ach:DomesticSharesMember
6	H Shares	Member			ach:ClassOfHSharesMember
7	Disclosure of classes of share capital [line items]	LineItems			ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
8	Entity Registrant Name	Concept (Text/String)	For Period		dei:EntityRegistrantName
9	Entity Central Index Key	Concept (CIK Number)	For Period		dei:EntityCentralIndexKey
10	Document Type	Concept (Submission Type)	For Period		dei:DocumentType
11	Document Period End Date	Concept (Date)	For Period		dei:DocumentPeriodEndDate
12	Amendment Flag	Concept (Yes/No)	For Period		dei:AmendmentFlag
13	Current Fiscal Year End Date	Concept (Month/Day)	For Period		dei:CurrentFiscalYearEndDate
14	Entity Well-known Seasoned Issuer	Concept (Yes/No)	For Period		dei:EntityWellKnownSeasonedIssuer
15	Entity Voluntary Filers	Concept (Yes/No)	For Period		dei:EntityVoluntaryFilers
16	Entity Current Reporting Status	Concept (Yes/No)	For Period		dei:EntityCurrentReportingStatus
17	Entity Filer Category	Concept (Filer Category)	For Period		dei:EntityFilerCategory
18	Entity Common Stock, Shares Outstanding	Concept (Shares)	As Of		dei:EntityCommonStockSharesOutstanding
19	Entity Emerging Growth Company	Concept (Yes/No)	For Period		dei:EntityEmergingGrowthCompany
20	Entity Shell Company	Concept (Yes/No)	For Period		dei:EntityShellCompany
21	Document Fiscal Year Focus	Concept (Year)	For Period		dei:DocumentFiscalYearFocus
22	Document Fiscal Period Focus	Concept (Fiscal Period)	For Period		dei:DocumentFiscalPeriodFocus
23	00100 - Statement - CONSOLIDATED STATEMENTS OF FINANCIAL POSITION	Network	*	*	http://www.chalco.com.cn/role/StatementConsolidatedStatementsOfFinancialPosition
24	Implied Table	Table	*	*	implied:Table
25	CONSOLIDATED STATEMENTS OF FINANCIAL POSITION	Abstract			ifrs-full:StatementOfFinancialPositionAbstract
26	ASSETS	Abstract			ifrs-full:AssetsAbstract
27	Non-current assets	Abstract			ifrs-full:NoncurrentAssetsAbstract
28	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
29	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
30	Investment properties	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentProperty
31	Land use rights	Concept (Monetary)	As Of	Debit	ach:LandUseRights
32	Investments in joint ventures	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod
33	Investments in associates	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
34	Available-for-sale investments	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentFinancialAssetsAvailableforsale
35	Equity investments designated at fair value through other comprehensive income	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentInvestmentsInEquityInstrumentsDesignatedAtFairValueThroughOtherComprehensiveIncome
36	Deferred tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
37	Other non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentAssets
38	Total non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
39	Current assets	Abstract			ifrs-full:CurrentAssetsAbstract
40	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
41	Trade and notes receivables	Concept (Monetary)	As Of	Debit	ach:TradeAndNotesReceivables
42	Other current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentAssets
43	Financial assets at fair value through profit or loss	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentFinancialAssetsAtFairValueThroughProfitOrLoss
44	Restricted cash	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentRestrictedCashAndCashEquivalents
45	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
46	Total current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
47	Total assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
48	EQUITY AND LIABILITIES	Abstract			ifrs-full:EquityAndLiabilitiesAbstract
49	EQUITY	Abstract			ifrs-full:EquityAbstract
50	Equity attributable to owners of the parent	Abstract			ach:DisclosureOfEquityAttributableToOwnersOfParentAbstract
51	Share capital	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
52	Other reserves	Concept (Monetary)	As Of	Credit	ifrs-full:OtherReserves
53	Accumulated losses	Concept (Monetary)	As Of	Credit	ifrs-full:RetainedEarnings
54	Equity attributable to owners of the parent	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAttributableToOwnersOfParent
55	Non-controlling interests	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
56	Total equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
57	LIABILITIES	Abstract			ifrs-full:LiabilitiesAbstract
58	Non-current liabilities	Abstract			ach:OtherNonCurrentLiabilitiesAbstract
59	Interest-bearing loans and borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
60	Other non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNoncurrentLiabilities
61	Deferred tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
62	Total non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
63	Current liabilities	Abstract			ifrs-full:CurrentLiabilitiesAbstract
64	Trade and notes payables	Concept (Monetary)	As Of	Credit	ach:TradeAndCurrentNotesPayables
65	Other payables and accrued liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:AccrualsAndDeferredIncomeClassifiedAsCurrent
66	Contract liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentContractLiabilities
67	Financial liabilities at fair value through profit or loss	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLoss
68	Income tax payable	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentTaxLiabilitiesCurrent
69	Interest-bearing loans and borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings
70	Total current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
71	Total liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
72	Total equity and liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAndLiabilities
73	Net current liabilities	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssetsLiabilities
74	Total assets less current liabilities	Concept (Monetary)	As Of	Debit	ifrs-full:AssetsLessCurrentLiabilities
75	00200 - Statement - CONSOLIDATED STATEMENTS OF PROFIT OR LOSS AND OTHER COMPREHENSIVE INCOME	Network	*	*	http://www.chalco.com.cn/role/StatementConsolidatedStatementsOfProfitOrLossAndOtherComprehensiveIncome
76	Implied Table	Table	*	*	implied:Table
77	CONSOLIDATED STATEMENTS OF PROFIT OR LOSS AND OTHER COMPREHENSIVE INCOME	Abstract			ifrs-full:IncomeStatementAbstract
78	Revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
79	Cost of sales	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfSales
80	Gross profit	Concept (Monetary)	For Period	Credit	ifrs-full:GrossProfit
81	Selling and distribution expenses	Concept (Monetary)	For Period	Debit	ifrs-full:SellingExpense
82	General and administrative expenses	Concept (Monetary)	For Period	Debit	ifrs-full:AdministrativeExpense
83	Research and development expenses	Concept (Monetary)	For Period	Debit	ifrs-full:ResearchAndDevelopmentExpense
84	Impairment loss on property, plant and equipment	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
85	Impairment losses on financial assets	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLossOnFinancialAssets
86	Impairment losses on investments in joint ventures	Concept (Monetary)	For Period	Debit	ach:ImpairmentLossesOnInvestmentsInJointVentures
87	Other income	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromGovernmentGrants
88	Other gains, net	Concept (Monetary)	For Period	Credit	ifrs-full:OtherGainsLosses
89	Finance income	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncome
90	Finance costs	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
91	Share of profits and losses of:	Abstract			ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethodAbstract
92	Joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod
93	Associates	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
94	Profit before income tax	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
95	Income tax benefit/(expense)	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
96	Profit for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
97	Profit attributable to:	Abstract			ifrs-full:ProfitLossAttributableToAbstract
98	Owners of the parent	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOwnersOfParent
99	Non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToNoncontrollingInterests
100	Profit for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
101	Other comprehensive income, net of tax:	Abstract			ifrs-full:OtherComprehensiveIncomeAbstract
102	Other comprehensive income to be reclassified to profit or loss in subsequent periods:	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
103	Available-for-sale investments:	Abstract			ach:DisclosureOfFairValueOfEachInvestmentInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeAndAvailableForSaleFinancialInvestmentAbstract
104	Changes in fair value	Concept (Monetary)	For Period	Credit	ifrs-full:FairValueGainsLossesOnFinancialAssetsReclassifiedOutOfAvailableforsaleFinancialAssetsRecognisedInOtherComprehensiveIncome
105	Reclassification adjustments for gains included in profit or loss	Abstract			ach:ReclassificationAdjustmentsForGainsIncludedProfitOrLoss
106	Gain on disposal	Concept (Monetary)	For Period	Debit	ifrs-full:ReclassificationAdjustmentsOnAvailableforsaleFinancialAssetsBeforeTax
107	Income tax effect	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToAvailableforsaleFinancialAssetsOfOtherComprehensiveIncome
108	Transfer out other comprehensive income of an associate	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax
109	Exchange differences on translation of foreign operations	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax
110	Net other comprehensive income that may be reclassified to profit or loss in subsequent periods	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax
111	Other comprehensive income that will not be reclassified to profit or loss in subsequent periods	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
112	Equity investments designated at fair value through other comprehensive income:	Abstract			ifrs-full:DisclosureOfFairValueOfInvestmentsInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeAbstract
113	Change in fair value	Concept (Monetary)	For Period	Credit	ifrs-full:FairValueGainsLossesOnFinancialAssetsReclassifiedOutOfFinancialAssetsAtFairValueThroughProfitOrLossNotRecognisedInProfitOrLoss
114	Income tax effect	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToInvestmentsInEquityInstrumentsOfOtherComprehensiveIncome
115	Net other comprehensive income that will not be reclassified to profit or loss in subsequent periods	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax
116	Total other comprehensive income/(loss), net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
117	Total comprehensive income for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
118	Total comprehensive income for the year attributable to:	Abstract			ifrs-full:ComprehensiveIncomeAttributableToAbstract
119	Owners of the parent	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
120	Non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
121	Total comprehensive income for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
122	Basic and diluted earnings per share attributable to ordinary equity holders of the parent (expressed in RMB per share)	Concept (Share)	For Period		ifrs-full:BasicAndDilutedEarningsLossPerShare
123	00300 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY	Network	*	*	http://www.chalco.com.cn/role/StatementConsolidatedStatementsOfChangesInEquity
124	Statement of changes in equity [table]	Table	*	*	ifrs-full:StatementOfChangesInEquityTable
125	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
126	Equity [member]	Member			ifrs-full:EquityMember
127	Total	Member			ifrs-full:EquityAttributableToOwnersOfParentMember
128	Share capital	Member			ifrs-full:IssuedCapitalMember
129	Capital reserves	Member			ifrs-full:CapitalReserveMember
130	Share premium	Member			ifrs-full:SharePremiumMember
131	Other capital reserves	Member			ifrs-full:OtherEquityInterestMember
132	Statutory surplus reserve	Member			ifrs-full:StatutoryReserveMember
133	Special reserve	Member			ach:SpecialReserveMember
134	Gain on available-for-sale financial assets	Member			ifrs-full:ReserveOfGainsAndLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember
135	Other equity instruments	Member			ifrs-full:OtherEquitySecuritiesMember
136	Foreign currency translation reserve	Member			ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
137	Retained earnings (Accumulated losses)	Member			ifrs-full:RetainedEarningsMember
138	Non-controlling interests	Member			ifrs-full:NoncontrollingInterestsMember
139	CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY	LineItems			ifrs-full:StatementOfChangesInEquityLineItems
140	At January 1,	Concept (Monetary)	As Of	Credit	ach:EquityBeforeAdjustment
141	Add: Adjustment due to business combinations under common control (note 38)	Concept (Monetary)	For Period	Credit	ach:AdjustmentToEquityForCombinationsUnderCommonControl
142	Effect of adoption of IFRS 9 (note 2.2)	Concept (Monetary)	For Period	Credit	ach:EffectOfAdoptionOfIfrs9
143	At January 1,	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
144	Profit for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
145	Other comprehensive income for the year	Abstract			ifrs-full:OtherComprehensiveIncomeAbstract
146	Changes in fair value of available-for-sale financial assets, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnRemeasuringAvailableforsaleFinancialAssetsNetOfTax
147	Changes in fair value of equity investments at fair value through other comprehensive income, net of tax	Concept (Monetary)	For Period	Credit	ach:ChangesInFairValueOfEquityInvestmentsAtFairValueThroughOtherComprehensiveIncomeNetOfTax
148	Disposal of available-for-sale financial assets, net of tax	Concept (Monetary)	For Period	Debit	ifrs-full:ReclassificationAdjustmentsOnAvailableforsaleFinancialAssetsNetOfTax
149	Transfer out of share of other comprehensive income of an associate	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossBeforeTax
150	Exchange differences on translation of foreign operations	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation
151	Total comprehensive income for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
152	Release of deferred government subsidies	Concept (Monetary)	For Period	Credit	ach:IncreaseThroughReleaseOfGovernmentGrantEquity
153	Equity exchange arrangement	Concept (Monetary)	For Period	Credit	ach:IncreaseDecreaseEquityExchangeArrangement
154	Business combinations under common control (note 38)	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl
155	Disposal of subsidiaries	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughDisposalOfSubsidiary
156	Disposal of equity interest in subsidiaries without loss of control	Concept (Monetary)	For Period	Credit	ach:IncreaseDecreaseThroughDisposalOfEquityInterestInSubsidiaryWithoutLossOfControl
157	Deemed disposal of a subsidiary	Concept (Monetary)	For Period	Credit	ach:IncreaseDecreaseThroughDeemedDisposalOfSubsidiaryEquity
158	Dividends distributed by subsidiaries to non-controlling shareholders	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsRecognisedAsDistributionsToNoncontrollingInterests
159	Dividends distribution before business combinations under common control	Concept (Monetary)	For Period	Debit	ach:DividendsRecognisedAsDistributionsBeforeBusinessCombinationsUnderCommonControl
160	Issuance of senior perpetual securities	Concept (Monetary)	For Period	Credit	ach:IssueOfSeniorPerpetualSecurities
161	Capital injection from non-controlling shareholders	Concept (Monetary)	For Period	Credit	ach:IncreaseThroughCapitalContributionsByNonControllingInterestsEquity
162	Capital injection from the parent company	Concept (Monetary)	For Period	Credit	ach:IncreaseThroughCapitalInjectionFromParentCompany
163	Acquisition of non-controlling interests	Concept (Monetary)	For Period	Credit	ach:IncreaseDecreaseThroughAcquisitionOfNonControllingInterests
164	Restructure of subsidiaries	Concept (Monetary)	For Period	Credit	ach:IncreaseDecreaseThroughRestructureOfSubsidiaries
165	Acquisition of a subsidiaries	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughAcquisitionOfSubsidiary
166	Other appropriations	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughAppropriationOfRetainedEarnings
167	Share of reserves of joint ventures and associates	Concept (Monetary)	For Period	Credit	ach:IncreaseDecreaseThroughShareOfReservesOfJointVenturesAndAssociates
168	Issuance of perpetual medium-term notes	Concept (Monetary)	For Period	Credit	ach:IssueOfPerpetualMediumTermNotes
169	Repayment of senior perpetual securities by a subsidiary	Concept (Monetary)	For Period	Debit	ach:RepaymentOfSeniorPerpetualSecurity
170	Perpetual medium-term notes' dividends	Concept (Monetary)	For Period	Debit	ach:DividendsPerpetualMediumTermNotes
171	Other equity instruments' distribution	Concept (Monetary)	For Period	Debit	ach:DecreaseThroughDistributionOfOtherEquityInstruments
172	At December 31,	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
173	Equity other information	Abstract			ach:EquityOtherInformationAbstract
174	Other reserves	Concept (Monetary)	As Of	Credit	ifrs-full:OtherReserves
175	00400 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS	Network	*	*	http://www.chalco.com.cn/role/StatementConsolidatedStatementsOfCashFlows
176	Implied Table	Table	*	*	implied:Table
177	CONSOLIDATED STATEMENTS OF CASH FLOWS	Abstract			ifrs-full:StatementOfCashFlowsAbstract
178	Net cash flows from operating activities	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperatingActivities
179	Investing activities	Abstract			ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
180	Purchases of intangible assets	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities
181	Purchases of property, plant and equipment	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
182	Purchase of land use rights	Concept (Monetary)	For Period	Credit	ach:PurchaseOfLandUseRightsClassifiedAsInvestingActivities
183	Purchases of investment properties	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfInvestmentProperty
184	Proceeds from disposal of property, plant and equipment	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
185	Proceeds from disposal of intangible assets	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfIntangibleAssetsClassifiedAsInvestingActivities
186	Proceeds from disposal of land use rights	Concept (Monetary)	For Period	Debit	ach:ProceedsFromDisposalOfLandUseRightsClassifiedAsInvestingActivities
187	Proceeds from disposal of a joint venture and an associate	Concept (Monetary)	For Period	Debit	ach:ProceedsFromSalesOfInterestsInJointVentureAssociates
188	Acquisition of a subsidiaries	Concept (Monetary)	For Period	Debit	ach:CashAndCashEquivalentsReceivedOnAcquisitionOfSubsidiary
189	Proceeds from disposal and deemed disposal of subsidiaries and business, net of cash	Concept (Monetary)	For Period	Debit	ach:ProceedsFromDisposalAndDeemedDisposalOfSubsidiariesAndBusinessNetOfCashClassifiedAsInvestingActivities
190	Interest received from unpaid disposal proceeds	Concept (Monetary)	For Period	Debit	ach:InterestReceivedFromUnpaidDisposalProceedsClassifiedAsInvestingActivities
191	Interest received from loans and borrowings to others	Concept (Monetary)	For Period	Debit	ifrs-full:InterestReceivedClassifiedAsInvestingActivities
192	Investments in joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities
193	Investments in associates	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfInterestsInAssociates
194	(Purchase of)/return of investment from equity investments	Concept (Monetary)	For Period	Debit	ach:ReturnOfInvestmentFromPurchasesOfEquityInvestments
195	Proceeds from dividends and disposal of equity investments	Concept (Monetary)	For Period	Debit	ach:ProceedsFromDividendsAndDisposalOfEquityInvestments
196	Dividend received	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsReceivedClassifiedAsInvestingActivities
197	Decrease in time deposits	Concept (Monetary)	For Period	Debit	ach:CashFlowsFromUsedInDecreaseIncreaseInTimeDepositsClassifiedAsInvestingActivities
198	Cash paid for settlement of futures, options and forward contracts	Concept (Monetary)	For Period	Debit	ach:CashFlowsFromUsedInDecreaseIncreaseInFuturesOptionsAndForwardForeignExchangeContractsClassifiedAsInvestingActivities
199	Loans to related parties	Concept (Monetary)	For Period	Credit	ach:CashAdvancesAndLoansToRelatedPartiesClassifiedAsInvestingActivities
200	Loans repaid by related parties	Concept (Monetary)	For Period	Debit	ach:CashRepaymentsOfAdvancesAndLoansToRelatedPartiesClassifiedAsInvestingActivities
201	Asset-related government grants received	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromGovernmentGrantsClassifiedAsInvestingActivities
202	Net cash flows used in investing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivities
203	Financing activities	Abstract			ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
204	Proceeds from a gold leasing arrangement	Concept (Monetary)	For Period	Debit	ach:ProceedFromGoldLeasingArrangementClassifiedAsFinancingActivities
205	Repayments of gold leasing arrangement	Concept (Monetary)	For Period	Credit	ach:InterestPaidForGoldLeasingArrangementClassifiedAsFinancingActivities
206	Purchase of non-controlling interest	Concept (Monetary)	For Period	Credit	ach:PaymentsForPurchaseOfNonControllingInterests
207	Proceeds from issuance of bonds and notes, net of issuance costs	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromIssueOfBondsNotesAndDebentures
208	Repayments of senior perpetual securities	Concept (Monetary)	For Period	Credit	ach:RepaymentsOfSeniorPerpetualSecuritiesClassifiedAsFinancingActivities
209	Proceeds from issuance of perpetual securities, net of issuance costs	Concept (Monetary)	For Period	Debit	ach:ProceedsFromIssueOfSeniorPerpetualSecurities
210	Repayments of bonds and notes	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfBondsNotesAndDebentures
211	Senior perpetual securities distribution paid	Concept (Monetary)	For Period	Debit	ach:SeniorPerpetualSecuritiesDistributionPaid
212	Drawdown of short-term and long-term loans	Concept (Monetary)	For Period	Debit	ach:ProceedsFromDrawdownOfShortTermAndLongTermLoans
213	Repayments of short-term and long-term loans	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
214	Cash consideration paid for business combination under common control	Concept (Monetary)	For Period	Credit	ach:BusinessCombinationUnderCommonControl
215	Proceeds from sale and leaseback finance leases, net of deposit and transaction costs	Concept (Monetary)	For Period	Debit	ach:ProceedsFromFinanceLeaseLiabilitiesClassifiedAsFinancingActivities
216	Capital injection from the parent company to the entity acquired under common control	Concept (Monetary)	For Period	Debit	ach:CapitalInjectionFromParentCompanyToEntityAcquiredUnderCommonControl
217	Finance lease instalment paid	Concept (Monetary)	For Period	Credit	ifrs-full:PaymentsOfFinanceLeaseLiabilitiesClassifiedAsFinancingActivities
218	Capital injection from non-controlling shareholders	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromContributionsOfNoncontrollingInterests
219	Dividends paid by subsidiaries to non-controlling shareholders	Concept (Monetary)	For Period	Credit	ifrs-full:DividendsPaidClassifiedAsFinancingActivities
220	Interest paid	Concept (Monetary)	For Period	Credit	ifrs-full:InterestPaidClassifiedAsFinancingActivities
221	Net cash flows used in financing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivities
222	Net increase/(decrease) in cash and cash equivalents	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges
223	Cash and cash equivalents at beginning of year	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
224	Effect of foreign exchange rate changes, net	Concept (Monetary)	For Period	Debit	ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
225	Cash and cash equivalents at December 31	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
226	10101 - Disclosure - GENERAL INFORMATION	Network	*	*	http://www.chalco.com.cn/role/DisclosureGeneralInformation
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228	GENERAL INFORMATION	Abstract			ach:GeneralInformationAbstract
229	GENERAL INFORMATION	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory
230	10201 - Disclosure - BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES	Network	*	*	http://www.chalco.com.cn/role/DisclosureBasisOfPreparationAndSignificantAccountingPolicies
231	Implied Table	Table	*	*	implied:Table
232	BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES	Abstract			ach:BasisOfPreparationAndSummaryOfSignificantAccountingPoliciesAbstract
233	BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
234	10301 - Disclosure - SIGNIFICANT ACCOUNTING ESTIMATES AND JUDGEMENTS	Network	*	*	http://www.chalco.com.cn/role/DisclosureSignificantAccountingEstimatesAndJudgements
235	Implied Table	Table	*	*	implied:Table
236	SIGNIFICANT ACCOUNTING ESTIMATES AND JUDGEMENTS	Abstract			ach:DisclosureOfSignificantAccountingEstimatesAndJudgementsAbstract
237	SIGNIFICANT ACCOUNTING ESTIMATES AND JUDGEMENTS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAccountingJudgementsAndEstimatesExplanatory
238	10401 - Disclosure - REVENUE AND SEGMENT INFORMATION	Network	*	*	http://www.chalco.com.cn/role/DisclosureRevenueAndSegmentInformation
239	Implied Table	Table	*	*	implied:Table
240	REVENUE AND SEGMENT INFORMATION	Abstract			ifrs-full:DisclosureOfOperatingSegmentsAbstract
241	REVENUE AND SEGMENT INFORMATION	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
242	10501 - Disclosure - INTANGIBLE ASSETS	Network	*	*	http://www.chalco.com.cn/role/DisclosureIntangibleAssets
243	Implied Table	Table	*	*	implied:Table
244	INTANGIBLE ASSETS	Abstract			ifrs-full:DisclosureOfIntangibleAssetsAbstract
245	INTANGIBLE ASSETS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIntangibleAssetsExplanatory
246	10601 - Disclosure - PROPERTY, PLANT AND EQUIPMENT	Network	*	*	http://www.chalco.com.cn/role/DisclosurePropertyPlantAndEquipment
247	Implied Table	Table	*	*	implied:Table
248	PROPERTY, PLANT AND EQUIPMENT	Abstract			ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
249	PROPERTY, PLANT AND EQUIPMENT	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
250	10701 - Disclosure - INVESTMENT PROPERTIES	Network	*	*	http://www.chalco.com.cn/role/DisclosureInvestmentProperties
251	Implied Table	Table	*	*	implied:Table
252	INVESTMENT PROPERTIES	Abstract			ifrs-full:DisclosureOfInvestmentPropertyAbstract
253	INVESTMENT PROPERTIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInvestmentPropertyExplanatory
254	10801 - Disclosure - LAND USE RIGHTS AND LEASEHOLD LAND	Network	*	*	http://www.chalco.com.cn/role/DisclosureLandUseRightsAndLeaseholdLand
255	Implied Table	Table	*	*	implied:Table
256	LAND USE RIGHTS AND LEASEHOLD LAND	Abstract			ach:LandUseRightsAndLeaseholdLandAbstract
257	LAND USE RIGHTS AND LEASEHOLD LAND	Concept (Text Block (HTML))	For Period		ach:DisclosureOfLandUseRightsAndLeaseholdLandExplanatoryTextBlock
258	10901 - Disclosure - INVESTMENTS IN JOINT VENTURES AND ASSOCIATES	Network	*	*	http://www.chalco.com.cn/role/DisclosureInvestmentsInJointVenturesAndAssociates
259	Implied Table	Table	*	*	implied:Table
260	INVESTMENTS IN JOINT VENTURES AND ASSOCIATES	Abstract			ifrs-full:DisclosureOfJointVenturesAbstract
261	INVESTMENTS IN JOINT VENTURES AND ASSOCIATES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInterestsInOtherEntitiesExplanatory
262	11001 - Disclosure - EQUITY INVESTMENTS DESIGNATED AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME/AVAILABLE-FOR-SALE FINANCIAL INVESTMENTS	Network	*	*	http://www.chalco.com.cn/role/DisclosureEquityInvestmentsDesignatedAtFairValueThroughOtherComprehensiveIncomeAvailableForSaleFinancialInvestments
263	Implied Table	Table	*	*	implied:Table
264	EQUITY INVESTMENTS DESIGNATED AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME/AVAILABLE-FOR-SALE FINANCIAL INVESTMENTS	Abstract			ach:DisclosureOfFairValueOfEachInvestmentInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeAndAvailableForSaleFinancialInvestmentAbstract
265	EQUITY INVESTMENTS DESIGNATED AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME/AVAILABLE-FOR-SALE FINANCIAL INVESTMENTS	Concept (Text Block (HTML))	For Period		ach:DisclosureOfFairValueOfEachInvestmentInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeAndAvailableForSaleFinancialInvestmentTextBlock
266	11101 - Disclosure - DEFERRED TAX	Network	*	*	http://www.chalco.com.cn/role/DisclosureDeferredTax
267	Implied Table	Table	*	*	implied:Table
268	DEFERRED TAX	Abstract			ifrs-full:DeferredTaxAssetsAndLiabilitiesAbstract
269	DEFERRED TAX	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDeferredTaxesExplanatory
270	11201 - Disclosure - OTHER NON-CURRENT ASSETS	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherNonCurrentAssets
271	Implied Table	Table	*	*	implied:Table
272	OTHER NON-CURRENT ASSETS	Abstract			ach:OtherNonCurrentAssetsAbstract
273	OTHER NON-CURRENT ASSETS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherNoncurrentAssetsExplanatory
274	11301 - Disclosure - INVENTORIES	Network	*	*	http://www.chalco.com.cn/role/DisclosureInventories
275	Implied Table	Table	*	*	implied:Table
276	INVENTORIES	Abstract			ifrs-full:ClassesOfInventoriesAbstract
277	INVENTORIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInventoriesExplanatory
278	11401 - Disclosure - TRADE AND NOTES RECEIVABLES	Network	*	*	http://www.chalco.com.cn/role/DisclosureTradeAndNotesReceivables
279	Implied Table	Table	*	*	implied:Table
280	TRADE AND NOTES RECEIVABLES	Abstract			ifrs-full:TradeAndOtherReceivablesAbstract
281	TRADE AND NOTES RECEIVABLES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
282	11501 - Disclosure - OTHER CURRENT ASSETS	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherCurrentAssets
283	Implied Table	Table	*	*	implied:Table
284	OTHER CURRENT ASSETS	Abstract			ach:OtherCurrentAssetsAbstract
285	OTHER CURRENT ASSETS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherCurrentAssetsExplanatory
286	11601 - Disclosure - CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AND TIME DEPOSITS	Network	*	*	http://www.chalco.com.cn/role/DisclosureCashAndCashEquivalentsAndRestrictedCashAndTimeDeposits
287	Implied Table	Table	*	*	implied:Table
288	CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AND TIME DEPOSITS	Abstract			ach:CashAndCashEquivalentsAndRestrictedCashAndCashEquivalentsAbstract
289	CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AND TIME DEPOSITS	Concept (Text Block (HTML))	For Period		ach:DisclosureOfCashAndCashEquivalentsAndRestrictedCashAndCashEquivalentsExplanatoryTextBlock
290	11701 - Disclosure - SHARE CAPITAL	Network	*	*	http://www.chalco.com.cn/role/DisclosureShareCapital
291	Implied Table	Table	*	*	implied:Table
292	SHARE CAPITAL	Abstract			ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
293	SHARE CAPITAL	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
294	11801 - Disclosure - RESERVES	Network	*	*	http://www.chalco.com.cn/role/DisclosureReserves
295	Implied Table	Table	*	*	implied:Table
296	RESERVES	Abstract			ifrs-full:DisclosureOfReservesWithinEquityAbstract
297	RESERVES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReservesAndOtherEquityInterestExplanatory
298	11901 - Disclosure - INTEREST BEARING LOANS AND BORROWINGS	Network	*	*	http://www.chalco.com.cn/role/DisclosureInterestBearingLoansAndBorrowings
299	Implied Table	Table	*	*	implied:Table
300	INTEREST BEARING LOANS AND BORROWINGS	Abstract			ifrs-full:BorrowingsAbstract
301	INTEREST BEARING LOANS AND BORROWINGS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBorrowingsExplanatory
302	12001 - Disclosure - FINANCE LEASE PAYABLES	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinanceLeasePayables
303	Implied Table	Table	*	*	implied:Table
304	FINANCE LEASE PAYABLES	Abstract			ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeAbstract
305	FINANCE LEASE PAYABLES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfLeasesExplanatory
306	12101 - Disclosure - OTHER NON-CURRENT LIABILITIES	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherNonCurrentLiabilities
307	Implied Table	Table	*	*	implied:Table
308	OTHER NON-CURRENT LIABILITIES	Abstract			ach:OtherNonCurrentLiabilitiesAbstract
309	OTHER NON-CURRENT LIABILITIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherNoncurrentLiabilitiesExplanatory
310	12201 - Disclosure - OTHER PAYABLES AND ACCRUED LIABILITIES	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherPayablesAndAccruedLiabilities
311	Implied Table	Table	*	*	implied:Table
312	OTHER PAYABLES AND ACCRUED LIABILITIES	Abstract			ach:OtherPayablesAndAccruedLiabilitiesAbstract
313	OTHER PAYABLES AND ACCRUED LIABILITIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAccruedExpensesAndOtherLiabilitiesExplanatory
314	12301 - Disclosure - TRADE AND NOTES PAYABLES	Network	*	*	http://www.chalco.com.cn/role/DisclosureTradeAndNotesPayables
315	Implied Table	Table	*	*	implied:Table
316	TRADE AND NOTES PAYABLES	Abstract			ifrs-full:TradeAndOtherPayablesAbstract
317	TRADE AND NOTES PAYABLES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory
318	12401 - Disclosure - PLEDGE OF ASSETS	Network	*	*	http://www.chalco.com.cn/role/DisclosurePledgeOfAssets
319	Implied Table	Table	*	*	implied:Table
320	PLEDGE OF ASSETS	Abstract			ach:DisclosureOfAssetsPledgedAbstract
321	PLEDGE OF ASSETS	Concept (Text Block (HTML))	For Period		ach:DisclosureOfAssetsPledgedExplanatoryTextBlock
322	12501 - Disclosure - PROFIT BEFORE INCOME TAX	Network	*	*	http://www.chalco.com.cn/role/DisclosureProfitBeforeIncomeTax
323	Implied Table	Table	*	*	implied:Table
324	PROFIT BEFORE INCOME TAX	Abstract			ifrs-full:ProfitLossAbstract
325	PROFIT BEFORE INCOME TAX	Concept (Text Block (HTML))	For Period		ach:ProfitLossBeforeIncomeTaxExplanatoryTextBlock
326	12601 - Disclosure - OTHER INCOME	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherIncome
327	Implied Table	Table	*	*	implied:Table
328	OTHER INCOME	Abstract			ach:DisclosureOfOtherIncomeAbstract
329	OTHER INCOME	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherOperatingIncomeExplanatory
330	12701 - Disclosure - OTHER GAINS, NET	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherGainsNet
331	Implied Table	Table	*	*	implied:Table
332	OTHER GAINS, NET	Abstract			ach:DisclosureOfOtherGainLossesAbstract
333	OTHER GAINS, NET	Concept (Text Block (HTML))	For Period		ach:DisclosureOfOtherGainLossesExplanatoryTextBlock
334	12801 - Disclosure - FINANCE INCOME/FINANCE COSTS	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinanceIncomeFinanceCosts
335	Implied Table	Table	*	*	implied:Table
336	FINANCE INCOME/FINANCE COSTS	Abstract			ach:FinanceIncomeFinanceCostsAbstract
337	FINANCE INCOME/FINANCE COSTS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinanceIncomeExpenseExplanatory
338	12901 - Disclosure - EMPLOYEE BENEFIT EXPENSES	Network	*	*	http://www.chalco.com.cn/role/DisclosureEmployeeBenefitExpenses
339	Implied Table	Table	*	*	implied:Table
340	EMPLOYEE BENEFIT EXPENSES	Abstract			ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
341	EMPLOYEE BENEFIT EXPENSES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
342	13001 - Disclosure - DIRECTORS' AND SUPERVISORS' REMUNERATION	Network	*	*	http://www.chalco.com.cn/role/DisclosureDirectorsAndSupervisorsRemuneration
343	Implied Table	Table	*	*	implied:Table
344	DIRECTORS' AND SUPERVISORS' REMUNERATION	Abstract			ach:DisclosureOfInformationAboutKeyManagementPersonnelAbstract
345	DIRECTORS' AND SUPERVISORS' REMUNERATION	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInformationAboutKeyManagementPersonnelExplanatory
346	13101 - Disclosure - INCOME TAX BENEFIT/(EXPENSE)	Network	*	*	http://www.chalco.com.cn/role/DisclosureIncomeTaxBenefitExpense
347	Implied Table	Table	*	*	implied:Table
348	INCOME TAX BENEFIT/(EXPENSE)	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
349	INCOME TAX BENEFIT/(EXPENSE)	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIncomeTaxExplanatory
350	13201 - Disclosure - EARNINGS PER SHARE ATTRIBUTABLE TO ORDINARY EQUITY HOLDERS OF THE PARENT	Network	*	*	http://www.chalco.com.cn/role/DisclosureEarningsPerShareAttributableToOrdinaryEquityHoldersOfParent
351	Implied Table	Table	*	*	implied:Table
352	EARNINGS PER SHARE ATTRIBUTABLE TO ORDINARY EQUITY HOLDERS OF THE PARENT	Abstract			ifrs-full:EarningsPerShareAbstract
353	EARNINGS PER SHARE ATTRIBUTABLE TO ORDINARY EQUITY HOLDERS OF THE PARENT	Concept (Text Block (HTML))	For Period		ifrs-full:EarningsPerShareExplanatory
354	13301 - Disclosure - DIVIDENDS	Network	*	*	http://www.chalco.com.cn/role/DisclosureDividends
355	Implied Table	Table	*	*	implied:Table
356	DIVIDENDS	Abstract			ach:DisclosureOfDividendsAbstract
357	DIVIDENDS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDividendsExplanatory
358	13401 - Disclosure - NOTES TO THE CONSOLIDATED STATEMENT OF CASH FLOWS	Network	*	*	http://www.chalco.com.cn/role/DisclosureNotesToConsolidatedStatementOfCashFlows
359	Implied Table	Table	*	*	implied:Table
360	NOTES TO THE CONSOLIDATED STATEMENT OF CASH FLOWS	Abstract			ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
361	NOTES TO THE CONSOLIDATED STATEMENT OF CASH FLOWS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCashFlowStatementExplanatory
362	13501 - Disclosure - SIGNIFICANT RELATED PARTY BALANCES AND TRANSACTIONS	Network	*	*	http://www.chalco.com.cn/role/DisclosureSignificantRelatedPartyBalancesAndTransactions
363	Implied Table	Table	*	*	implied:Table
364	SIGNIFICANT RELATED PARTY BALANCES AND TRANSACTIONS	Abstract			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
365	SIGNIFICANT RELATED PARTY BALANCES AND TRANSACTIONS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRelatedPartyExplanatory
366	13601 - Disclosure - FINANCIAL AND CAPITAL RISK MANAGEMENT	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinancialAndCapitalRiskManagement
367	Implied Table	Table	*	*	implied:Table
368	FINANCIAL AND CAPITAL RISK MANAGEMENT	Abstract			ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsAbstract
369	FINANCIAL AND CAPITAL RISK MANAGEMENT	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
370	13701 - Disclosure - PARTLY-OWNED SUBSIDIARIES WITH MATERIAL NON-CONTROLLING INTERESTS	Network	*	*	http://www.chalco.com.cn/role/DisclosurePartlyOwnedSubsidiariesWithMaterialNonControllingInterests
371	Implied Table	Table	*	*	implied:Table
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373	PARTLY-OWNED SUBSIDIARIES WITH MATERIAL NON-CONTROLLING INTERESTS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory
374	13801 - Disclosure - BUSINESS COMBINATION	Network	*	*	http://www.chalco.com.cn/role/DisclosureBusinessCombination
375	Implied Table	Table	*	*	implied:Table
376	BUSINESS COMBINATION	Abstract			ifrs-full:DisclosureOfBusinessCombinationsAbstract
377	BUSINESS COMBINATION	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBusinessCombinationsExplanatory
378	13901 - Disclosure - DISPOSAL OF BUSINESSES	Network	*	*	http://www.chalco.com.cn/role/DisclosureDisposalOfBusinesses
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380	DISPOSAL OF BUSINESSES	Abstract			ach:DisposalGroupsClassifiedAsHeldForSaleAbstract
381	DISPOSAL OF BUSINESSES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNoncurrentAssetsHeldForSaleAndDiscontinuedOperationsExplanatory
382	14001 - Disclosure - OTHER EQUITY INSTRUMENTS	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherEquityInstruments
383	Implied Table	Table	*	*	implied:Table
384	OTHER EQUITY INSTRUMENTS	Abstract			ach:OtherEquityInstrumentsAbstract
385	OTHER EQUITY INSTRUMENTS	Concept (Text Block (HTML))	For Period		ach:DisclosureOfOtherEquityInstrumentsTextBlock
386	14101 - Disclosure - CONTINGENT LIABILITIES	Network	*	*	http://www.chalco.com.cn/role/DisclosureContingentLiabilities
387	Implied Table	Table	*	*	implied:Table
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389	CONTINGENT LIABILITIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfContingentLiabilitiesExplanatory
390	14201 - Disclosure - COMMITMENTS	Network	*	*	http://www.chalco.com.cn/role/DisclosureCommitments
391	Implied Table	Table	*	*	implied:Table
392	COMMITMENTS	Abstract			ach:CommitmentAbstract
393	COMMITMENTS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCommitmentsExplanatory
394	14301 - Disclosure - EVENTS AFTER THE REPORTING PERIOD	Network	*	*	http://www.chalco.com.cn/role/DisclosureEventsAfterReportingPeriod
395	Implied Table	Table	*	*	implied:Table
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397	EVENTS AFTER THE REPORTING PERIOD	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
398	14401 - Disclosure - COMPARATIVE AMOUNTS	Network	*	*	http://www.chalco.com.cn/role/DisclosureComparativeAmounts
399	Implied Table	Table	*	*	implied:Table
400	COMPARATIVE AMOUNTS	Abstract			ach:DisclosureOfComparativeAmountsAbstract
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402	14501 - Disclosure - APPROVAL OF THE FINANCIAL STATEMENTS	Network	*	*	http://www.chalco.com.cn/role/DisclosureApprovalOfFinancialStatements
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405	APPROVAL OF THE FINANCIAL STATEMENTS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAuthorisationOfFinancialStatementsExplanatory
406	20202 - Disclosure - BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBasisOfPreparationAndSignificantAccountingPoliciesPolicies
407	Implied Table	Table	*	*	implied:Table
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409	Basis of preparation	Concept (Text Block (HTML))	For Period		ach:DescriptionOfAccountingPolicyForBasisOfPreparationPolicyTextBlock
410	Changes in accounting policies and disclosures	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfChangesInAccountingPoliciesExplanatory
411	Issued but not yet effective International Financial Reporting Standards	Concept (Text Block (HTML))	For Period		ach:DescriptionOfAccountingPolicyForImpendingNewPronouncementsPolicyTextBlock
412	Investments in joint ventures and associates	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory
413	Segment reporting	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
414	Related parties	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForTransactionsWithRelatedPartiesExplanatory
415	Fair value measurement	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFairValueMeasurementExplanatory
416	Foreign currency translation	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
417	Property, plant and equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
418	Intangible assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory
419	Research and development costs	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory
420	Impairment of non-financial assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory
421	Investment properties	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForInvestmentPropertyExplanatory
422	Non-current assets and disposal groups held for sale	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory
423	Financial assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinancialAssetsExplanatory
424	Financial liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory
425	Offsetting financial instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForOffsettingOfFinancialInstrumentsExplanatory
426	Derivative financial instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialAssetsAtDateOfInitialApplicationOfIFRS9Explanatory
427	Inventories	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
428	Trade and notes receivables	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory
429	Cash and cash equivalents	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
430	Government grants	Concept (Text Block (HTML))	For Period		ach:DescriptionOfAccountingPolicyForGovernmentGrantsPolicyTextBlock
431	Trade and notes payables and other payables	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherPayablesExplanatory
432	Employee benefits	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
433	Current and deferred income tax	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
434	Perpetual securities	Concept (Text Block (HTML))	For Period		ach:DescriptionOfAccountingPolicyForPerpetualSecuritiesPolicyTextBlock
435	Revenue recognition	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
436	Interest income	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForInterestIncomeAndExpenseExplanatory
437	Dividend income	Concept (Text Block (HTML))	For Period		ach:DescriptionOfAccountingPolicyForDividendIncomePolicyTextBlock
438	Leases	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
439	Borrowing costs	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForBorrowingCostsExplanatory
440	Dividend distribution	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForDividendsExplanatory
441	Provisions	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
442	30103 - Disclosure - GENERAL INFORMATION (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureGeneralInformationTables
443	Implied Table	Table	*	*	implied:Table
444	GENERAL INFORMATION	Abstract			ach:GeneralInformationAbstract
445	Schedule of company's principal subsidiaries	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInterestsInSubsidiariesExplanatory
446	30203 - Disclosure - BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBasisOfPreparationAndSignificantAccountingPoliciesTables
447	Implied Table	Table	*	*	implied:Table
448	BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES	Abstract			ach:BasisOfPreparationAndSummaryOfSignificantAccountingPoliciesAbstract
449	Schedule of new and revised IFRSs adapted for the first time for the current year's financial statements	Concept (Text Block (HTML))	For Period		ach:DisclosureOfNewAndRevisedIfrsAdoptedTableTextBlock
450	Schedule of reconciliation between the carrying amounts under IAS 39 and the balances reported under IFRS 9	Concept (Text Block (HTML))	For Period		ach:ScheduleOfImpactsOfAdoptingIfrs9OnConsolidatedStatementOfFinancialPositionTableTextBlock
451	Schedule of reconciles the aggregate opening impairment allowances	Concept (Text Block (HTML))	For Period		ach:ScheduleOfReconcilesAggregateImpairmentAllowancesTableTextBlock
452	Schedule of impact on reserves and accumulated losses	Concept (Text Block (HTML))	For Period		ach:ScheduleOfImpactOnReservesAndAccumulatedLossesTableTextBlock
453	Schedule of effects of retrospective adjustments caused by change on financial statements	Concept (Text Block (HTML))	For Period		ach:ScheduleOfEffectsOfRetrospectiveAdjustmentsByAccountingPolicyChangeOnFinancialStatementsTableTextBlock
454	Schedule of new and revised IFRSs that have been issued but are not yet effective	Concept (Text Block (HTML))	For Period		ach:DisclosureOfNewAndRevisedIfrsIssuedButNotYetEffectiveTableTextBlock
455	Schedule of estimated useful lives of property, plant and equipment	Concept (Text Block (HTML))	For Period		ach:EstimatedUsefulLivesPropertyPlantAndEquipmentTableTextBlock
456	Schedule of estimated useful lives of investment properties	Concept (Text Block (HTML))	For Period		ach:DisclosureOfUsefulLivesInvestmentPropertyTableTextBlock
457	30403 - Disclosure - REVENUE AND SEGMENT INFORMATION (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureRevenueAndSegmentInformationTables
458	Implied Table	Table	*	*	implied:Table
459	REVENUE AND SEGMENT INFORMATION	Abstract			ifrs-full:DisclosureOfOperatingSegmentsAbstract
460	Schedule of revenue recognized during the years	Concept (Text Block (HTML))	For Period		ach:DisclosureOfRevenueRecognizedTableTextBlock
461	Schedule of disaggregated revenue information	Concept (Text Block (HTML))	For Period		ach:DisclosureOfDisaggregatedRevenueInformation
462	Schedule of disaggregated revenue information recognised performance obligation	Concept (Text Block (HTML))	For Period		ach:DisclosureOfDisaggregatedRevenueInformationRecognisedFromPerformanceObligation
463	Schedule of performance obligations	Concept (Text Block (HTML))	For Period		ach:DisclosureOfPerformanceObligations
464	Schedule of operating segments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOperatingSegmentsExplanatory
465	Schedule of geographical information of the operating segments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfGeographicalAreasExplanatory
466	30503 - Disclosure - INTANGIBLE ASSETS (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureIntangibleAssetsTables
467	Implied Table	Table	*	*	implied:Table
468	INTANGIBLE ASSETS	Abstract			ifrs-full:DisclosureOfIntangibleAssetsAbstract
469	Schedule of intangible assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory
470	Schedule of amortisation expenses of intangible assets recognized in profit or loss	Concept (Text Block (HTML))	For Period		ach:DisclosureOfAmortisationExpensesOfIntangibleAssetsRecognizedInProfitOrLossTextBlock
471	Schedule of summary of goodwill allocated to each segment	Concept (Text Block (HTML))	For Period		ach:DisclosureOfGoodwillAllocatedToEachSegmentTextBlock
472	30603 - Disclosure - PROPERTY, PLANT AND EQUIPMENT (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosurePropertyPlantAndEquipmentTables
473	Implied Table	Table	*	*	implied:Table
474	PROPERTY, PLANT AND EQUIPMENT	Abstract			ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
475	Schedule of property, plant and equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
476	Schedule of depreciation expenses recognized in profit or loss	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDepreciationAndAmortisationExpenseExplanatory
477	30703 - Disclosure - INVESTMENT PROPERTIES (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInvestmentPropertiesTables
478	Implied Table	Table	*	*	implied:Table
479	INVESTMENT PROPERTIES	Abstract			ifrs-full:DisclosureOfInvestmentPropertyAbstract
480	Schedule of net carrying amount of investment properties	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutInvestmentPropertyExplanatory
481	30803 - Disclosure - LAND USE RIGHTS AND LEASEHOLD LAND (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureLandUseRightsAndLeaseholdLandTables
482	Implied Table	Table	*	*	implied:Table
483	LAND USE RIGHTS AND LEASEHOLD LAND	Abstract			ach:LandUseRightsAndLeaseholdLandAbstract
484	Schedule of land use rights and leasehold land	Concept (Text Block (HTML))	For Period		ach:DisclosureOfDetailedInformationAboutLandUseRightsAndLeaseholdLandExplanatory
485	30903 - Disclosure - INVESTMENTS IN JOINT VENTURES AND ASSOCIATES (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInvestmentsInJointVenturesAndAssociatesTables
486	Disclosure of joint ventures [table]	Table	*	*	ifrs-full:DisclosureOfJointVenturesTable
487	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
488	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
489	Joint venture	Member			ifrs-full:JointVenturesMember
490	Aggregate joint ventures not individually material	Member			ifrs-full:AggregatedIndividuallyImmaterialJointVenturesMember
491	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
492	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
493	Associates	Member			ifrs-full:AssociatesMember
494	Aggregate associates that are not individually material	Member			ifrs-full:AggregatedIndividuallyImmaterialAssociatesMember
495	INVESTMENTS IN JOINT VENTURES AND ASSOCIATES	LineItems			ifrs-full:DisclosureOfJointVenturesLineItems
496	Schedule of movements in investments in joint ventures and associates	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory
497	Schedule of summarized financial information	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfSummarisedFinancialInformationOfJointVentureAccountedForUsingEquityMethodToCarryingAmountOfInterestInJointVentureExplanatory
498	Schedule of summarized financial information	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfSummarisedFinancialInformationOfAssociateAccountedForUsingEquityMethodToCarryingAmountOfInterestInAssociateExplanatory
499	31003 - Disclosure - EQUITY INVESTMENTS DESIGNATED AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME/AVAILABLE-FOR-SALE FINANCIAL INVESTMENTS (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureEquityInvestmentsDesignatedAtFairValueThroughOtherComprehensiveIncomeAvailableForSaleFinancialInvestmentsTables
500	Implied Table	Table	*	*	implied:Table
501	EQUITY INVESTMENTS DESIGNATED AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME/AVAILABLE-FOR-SALE FINANCIAL INVESTMENTS	Abstract			ach:DisclosureOfFairValueOfEachInvestmentInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeAndAvailableForSaleFinancialInvestmentAbstract
502	Schedule of equity investments designated at fair value through other comprehensive income/available-for-sale financial investments	Concept (Text Block (HTML))	For Period		ach:DisclosureOfAvailableForSaleFinancialAssetsTableTextBlock
503	31103 - Disclosure - DEFERRED TAX (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureDeferredTaxTables
504	Implied Table	Table	*	*	implied:Table
505	DEFERRED TAX	Abstract			ifrs-full:DeferredTaxAssetsAndLiabilitiesAbstract
506	Schedule of movements in deferred tax assets and deferred tax liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory
507	Schedule of analysis of the deferred tax balances of the Group for financial reporting purposes	Concept (Text Block (HTML))	For Period		ach:DisclosureOfDeferredTaxBalancesForFinancialReportingTextBlock
508	Schedule of the expiry profile of unprovided tax losses	Concept (Text Block (HTML))	For Period		ach:DisclosureOfExpiryProfileOfUnprovidedTaxLossesTextBlock
509	31203 - Disclosure - OTHER NON-CURRENT ASSETS (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherNonCurrentAssetsTables
510	Implied Table	Table	*	*	implied:Table
511	OTHER NON-CURRENT ASSETS	Abstract			ach:OtherNonCurrentAssetsAbstract
512	Schedule of other non-current assets	Concept (Text Block (HTML))	For Period		ach:DisclosureOfOtherNonCurrentAssetsTableTextBlock
513	31303 - Disclosure - INVENTORIES (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInventoriesTables
514	Schedule Of Inventory Disclosure [Table]	Table	*	*	ach:ScheduleOfInventoryDisclosureTable
515	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
516	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
517	Inventories	Member			ach:IfrsInventoriesMember
518	Inventories	LineItems			ach:ScheduleOfInventoryDisclosureLineItems
519	Schedule of inventories	Concept (Text Block (HTML))	For Period		ach:IfrsScheduleOfInventoryCurrentTableTextBlock
520	Schedule of movements in the provision for impairment of inventories	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherProvisionsExplanatory
521	31403 - Disclosure - TRADE AND NOTES RECEIVABLES (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureTradeAndNotesReceivablesTables
522	Implied Table	Table	*	*	implied:Table
523	TRADE AND NOTES RECEIVABLES	Abstract			ifrs-full:TradeAndOtherReceivablesAbstract
524	Schedule of trade and notes receivables	Concept (Text Block (HTML))	For Period		ach:DisclosureOfTradeReceivablesAdjustedAgainstProvisionForImpairmentOfReceivablesAndNotesReceivablesTableTextBlock
525	Schedule of ageing analysis of trade and notes receivables	Concept (Text Block (HTML))	For Period		ach:DisclosureOfAgeingAnalysisOfTradeAndNotesReceivablesTableTextBlock
526	Schedule of credit risk exposure	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCreditRiskExposureExplanatory
527	Schedule of ageing analysis of trade and notes receivables, past due but not impaired	Concept (Text Block (HTML))	For Period		ach:AnalysisOfAgeOfTradeAndNotesReceivablesThatArePastDueButNotImpairedTextBlock
528	Schedule of ageing analysis of trade receivables relate to customers in difficult economic situation	Concept (Text Block (HTML))	For Period		ach:DisclosureOfAgeingAnalysisOfTradeReceivablesRelateToCustomersInDifficultEconomicSituationTableTextBlock
529	Schedule of movements on the provision for impairment of trade and notes receivables	Concept (Text Block (HTML))	For Period		ach:DisclosureOfMovementsOnProvisionForImpairmentOfTradeAndNotesReceivablesTableTextBlock
530	31503 - Disclosure - OTHER CURRENT ASSETS (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherCurrentAssetsTables
531	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
532	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
533	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
534	Other current assets	Member			ach:IfrsOtherCurrentAssetsMember
535	OTHER CURRENT ASSETS	LineItems			ifrs-full:DisclosureOfFinancialAssetsLineItems
536	Schedule of other current assets	Concept (Text Block (HTML))	For Period		ach:DisclosureOfOtherCurrentAssetsTableTextBlock
537	Schedule of ageing analysis of financial assets included in other current assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialAssetsExplanatory
538	Schedule of movements in the provision for impairment of other current assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherProvisionsExplanatory
539	Schedule of financial assets included in other current assets at amortized cost	Concept (Text Block (HTML))	For Period		ach:ScheduleFinancialAssetsIncludedInOtherCurrentAssetsAtAmortisedCostTableTextBlock
540	Schedule of ageing analysis of financial assets not impaired financial assets included in other current assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsExplanatory
541	31603 - Disclosure - CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AND TIME DEPOSITS (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureCashAndCashEquivalentsAndRestrictedCashAndTimeDepositsTables
542	Implied Table	Table	*	*	implied:Table
543	CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AND TIME DEPOSITS	Abstract			ach:CashAndCashEquivalentsAndRestrictedCashAndCashEquivalentsAbstract
544	Schedule of cash and cash equivalents and restricted cash and time deposits	Concept (Text Block (HTML))	For Period		ach:DisclosureOfCashAndCashEquivalentsAndRestrictedCashAndCashEquivalentsExplanatoryTableTextBlock
545	Schedule of cash and cash equivalents denominated in foreign currency	Concept (Text Block (HTML))	For Period		ach:DisclosureOfCashAndCashEquivalentsDenominatedInForeignCurrencyTableTextBlock
546	31903 - Disclosure - INTEREST BEARING LOANS AND BORROWINGS (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInterestBearingLoansAndBorrowingsTables
547	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
548	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
549	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
550	Medium-term notes and bonds and long-term bonds	Member			ach:MediumTermNotesAndBondsAndLongTermBondsMember
551	Short-term bonds	Member			ach:ShortTermBondsMember
552	INTEREST BEARING LOANS AND BORROWINGS	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
553	Schedule of interest bearing loans and borrowings	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory
554	Schedule of maturity of long-term bank and other loans	Concept (Text Block (HTML))	For Period		ifrs-full:MaturityAnalysisForNonderivativeFinancialLiabilities
555	Schedule of interest-bearing loans and borrowings in which the Group received guarantees	Concept (Text Block (HTML))	For Period		ach:DisclosureOfGuaranteedBorrowingsTableTextBlock
556	32003 - Disclosure - FINANCE LEASE PAYABLES (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinanceLeasePayablesTables
557	Implied Table	Table	*	*	implied:Table
558	FINANCE LEASE PAYABLES	Abstract			ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeAbstract
559	Schedule of future minimum lease payments under finance leases and their present values	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeExplanatory
560	32103 - Disclosure - OTHER NON-CURRENT LIABILITIES (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherNonCurrentLiabilitiesTables
561	Implied Table	Table	*	*	implied:Table
562	OTHER NON-CURRENT LIABILITIES	Abstract			ach:OtherNonCurrentLiabilitiesAbstract
563	Schedule of other non current liabilities	Concept (Text Block (HTML))	For Period		ach:DisclosureOfOtherNonCurrentLiabilitiesTableTextBlock
564	Schedule of obligations in relation to retirement benefits under the Group's early retirement schemes	Concept (Text Block (HTML))	For Period		ach:DisclosureOfObligationsInRelationToRetirementBenefitsTableTextBlock
565	32203 - Disclosure - OTHER PAYABLES AND ACCRUED LIABILITIES (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherPayablesAndAccruedLiabilitiesTables
566	Implied Table	Table	*	*	implied:Table
567	OTHER PAYABLES AND ACCRUED LIABILITIES	Abstract			ach:OtherPayablesAndAccruedLiabilitiesAbstract
568	Schedule of other payables and accrued liabilities	Concept (Text Block (HTML))	For Period		ach:DisclosureOfOtherPayablesAndAccruedLiabilitiesExplanatoryTableTextBlock
569	32303 - Disclosure - TRADE AND NOTES PAYABLES (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureTradeAndNotesPayablesTables
570	Implied Table	Table	*	*	implied:Table
571	TRADE AND NOTES PAYABLES	Abstract			ifrs-full:TradeAndOtherPayablesAbstract
572	Schedule of trade and notes payables	Concept (Text Block (HTML))	For Period		ach:DisclosureOfTradeAndNotesPayablesTableTextBlock
573	Schedule of ageing analysis of trade and notes payables	Concept (Text Block (HTML))	For Period		ach:DisclosureOfAgeingAnalysisOfTradeAndNotesPayablesTableTextBlock
574	32403 - Disclosure - PLEDGE OF ASSETS (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosurePledgeOfAssetsTables
575	Implied Table	Table	*	*	implied:Table
576	PLEDGE OF ASSETS	Abstract			ach:DisclosureOfAssetsPledgedAbstract
577	Summary of pledged assets	Concept (Text Block (HTML))	For Period		ach:DisclosureOfPledgedAssetsTableTextBlock
578	32503 - Disclosure - PROFIT BEFORE INCOME TAX (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureProfitBeforeIncomeTaxTables
579	Implied Table	Table	*	*	implied:Table
580	PROFIT BEFORE INCOME TAX	Abstract			ifrs-full:ProfitLossAbstract
581	Schedule of analysis of profit before income tax	Concept (Text Block (HTML))	For Period		ach:DisclosureOfProfitOrLossBeforeIncomeTaxTableTextBlock
582	32703 - Disclosure - OTHER GAINS, NET (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherGainsNetTables
583	Implied Table	Table	*	*	implied:Table
584	OTHER GAINS, NET	Abstract			ach:DisclosureOfOtherGainLossesAbstract
585	Schedule of other gains, net	Concept (Text Block (HTML))	For Period		ach:DisclosureOfOtherGainsTableTextBlock
586	32803 - Disclosure - FINANCE INCOME/FINANCE COSTS (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinanceIncomeFinanceCostsTables
587	Implied Table	Table	*	*	implied:Table
588	FINANCE INCOME/FINANCE COSTS	Abstract			ach:FinanceIncomeFinanceCostsAbstract
589	Schedule of analysis of finance income/finance costs	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinanceCostExplanatory
590	32903 - Disclosure - EMPLOYEE BENEFIT EXPENSES (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureEmployeeBenefitExpensesTables
591	Implied Table	Table	*	*	implied:Table
592	EMPLOYEE BENEFIT EXPENSES	Abstract			ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
593	Schedule of analysis of employee benefit expenses	Concept (Text Block (HTML))	For Period		ach:DisclosureOfEmployeeBenefitExpensesTableTextBlock
594	33003 - Disclosure - DIRECTORS' AND SUPERVISORS' REMUNERATION (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureDirectorsAndSupervisorsRemunerationTables
595	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
596	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
597	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
598	Directors and supervisors	Member			ach:HighestPaidKeyManagementPersonnelOfEntityOtherThanDirectorsAndSupervisorsMember
599	Significant related party transactions	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
600	Schedule of directors' and supervisors' remuneration	Concept (Text Block (HTML))	For Period		ach:DisclosureOfAggregateAmountsOfRemunerationPayablesToDirectorsAndSupervisorsTableTextBlock
601	Schedule of remuneration of each director and supervisor	Concept (Text Block (HTML))	For Period		ach:DisclosureOfRemunerationOfEachDirectorAndSupervisorTableTextBlock
602	Schedule of remuneration payable to the remaining two highest paid individuals	Concept (Text Block (HTML))	For Period		ach:DisclosureOfRemunerationPayableToRemainingTwoHighestPaidIndividualsTableTextBlock
603	Schedule of remuneration of the directors and supervisors of the Company whose remuneration fell within the following band	Concept (Text Block (HTML))	For Period		ach:DisclosureOfInformationAboutKeyManagementPersonnelWhoseRemunerationFellWithinCertainRangeTableTextBlock
604	33103 - Disclosure - INCOME TAX BENEFIT/(EXPENSE) (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureIncomeTaxBenefitExpenseTables
605	Implied Table	Table	*	*	implied:Table
606	INCOME TAX BENEFIT/(EXPENSE)	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
607	Schedule of income tax benefit/(expense)	Concept (Text Block (HTML))	For Period		ach:DisclosureOfIncomeTaxExpenseBenefitTableTextBlock
608	Schedule of reconciliation of the tax expense applicable to profit before tax at the statutory rates	Concept (Text Block (HTML))	For Period		ach:DisclosureOfReconciliationOfAccountingProfitOrLossBeforeIncomeTaxAtStatutoryRatesTableTextBlock
609	33203 - Disclosure - EARNINGS PER SHARE ATTRIBUTABLE TO ORDINARY EQUITY HOLDERS OF THE PARENT (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureEarningsPerShareAttributableToOrdinaryEquityHoldersOfParentTables
610	Implied Table	Table	*	*	implied:Table
611	EARNINGS PER SHARE ATTRIBUTABLE TO ORDINARY EQUITY HOLDERS OF THE PARENT	Abstract			ifrs-full:EarningsPerShareAbstract
612	Schedule of basic earnings per share	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEarningsPerShareExplanatory
613	33403 - Disclosure - NOTES TO THE CONSOLIDATED STATEMENT OF CASH FLOWS (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureNotesToConsolidatedStatementOfCashFlowsTables
614	Implied Table	Table	*	*	implied:Table
615	NOTES TO THE CONSOLIDATED STATEMENT OF CASH FLOWS	Abstract			ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
616	Schedule of cash flows generated from operating activities	Concept (Text Block (HTML))	For Period		ach:DisclosureOfCashGeneratedFromOperatingActivitiesExplanatoryTableTextBlock
617	Schedule of reconciliation of liabilities arising from financing activities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesExplanatory
618	33503 - Disclosure - SIGNIFICANT RELATED PARTY BALANCES AND TRANSACTIONS (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureSignificantRelatedPartyBalancesAndTransactionsTables
619	Implied Table	Table	*	*	implied:Table
620	SIGNIFICANT RELATED PARTY BALANCES AND TRANSACTIONS	Abstract			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
621	Summary of significant related party transactions	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory
622	Summary of outstanding balances with related entities	Concept (Text Block (HTML))	For Period		ach:OutstandingBalancesForRelatedPartyTransactionsTableTextBlock
623	Summary of compensation of key management personnel	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesExplanatory
624	33603 - Disclosure - FINANCIAL AND CAPITAL RISK MANAGEMENT (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinancialAndCapitalRiskManagementTables
625	Disclosure of nature and extent of risks arising from financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
626	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
627	Risks [member]	Member			ifrs-full:TypesOfRisksMember
628	Commodity price risk	Member			ifrs-full:CommodityPriceRiskMember
629	Liquidity risk	Member			ifrs-full:LiquidityRiskMember
630	FINANCIAL AND CAPITAL RISK MANAGEMENT	LineItems			ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
631	Schedule of if the futures prices had increased/decreased	Concept (Text Block (HTML))	For Period		ifrs-full:SummaryQuantitativeDataAboutEntitysExposureToRisk
632	Schedule of maturity profile of Group's financial liabilities	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfMaturityAnalysisOfUndiscountedCashOutflowsToRepurchaseDerecognisedFinancialAssetsExplanatory
633	Schedule of carrying amounts of each of the categories of financial instruments of the Group	Concept (Text Block (HTML))	For Period		ach:DisclosureOfFinancialAssetsAndLiabilitiesTextBlock
634	Schedule of increase (decrease) due to commodity price risk impact on profit	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfMarketRiskExplanatory
635	Schedule of carrying amounts and fair values of the Group's financial instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFairValueOfFinancialAssetsAndFinancialLiabilitiesAndReclassificationExplanatory
636	Schedule of fair value measurement hierarchy	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFairValueOfFinancialInstrumentsExplanatory
637	Summary of significant unobservable inputs to the valuation of financial instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfEquityExplanatory
638	Schedule of the gearing ratio	Concept (Text Block (HTML))	For Period		ach:DisclosureOfGearingRatioTableTextBlock
639	33703 - Disclosure - PARTLY-OWNED SUBSIDIARIES WITH MATERIAL NON-CONTROLLING INTERESTS (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosurePartlyOwnedSubsidiariesWithMaterialNonControllingInterestsTables
640	Disclosure of subsidiaries [table]	Table	*	*	ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
641	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
642	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
643	Ningxia Energy	Member			ach:ChinaAluminumNingxiaEnergyGroupCompanyLimitedMember
644	Guizhou Huajin	Member			ach:GuizhouHuajinMember
645	Guizhou Huaren	Member			ach:GuizhouHuarenMember
646	Huayun	Member			ach:InnerMongoliaHuayunNewMaterialCo.LtdHuayunMember
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649	Summarized financial information of subsidiaries	Concept (Text Block (HTML))	For Period		ach:DisclosureOfFinancialInformationOfSubsidiariesTableTextBlock
650	33803 - Disclosure - BUSINESS COMBINATION (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBusinessCombinationTables
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655	Pseudoboehmite and activated silicon powder production lines	Member			ach:PseudoboehmiteAndActivatedSiliconPowderProductionLinesOfScienceAndTechnologyChemicalCompanyMember
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657	Xinghua Technology	Member			ach:ChinalcoShanxiJiaokouXinghuaTechnologyLimitedMember
658	Qingdao Light Metal	Member			ach:ChinalcoQingdaoLightMetalCo.Ltd.Member
659	Shanxi Aluminum Sewage Treatment Plant	Member			ach:SewageTreatmentPlantOfChalcoShanxiAluminumMember
660	Yinxing Power	Member			ach:NingxiaYinxingPowerCo.LtdMember
661	Guizhou Huaren	Member			ach:GuizhouHuarenMember
662	Shanxi Zhongrun	Member			ach:ShanxiZhongrunMember
663	Shanxi Huaxing	Member			ach:ShanxiHuaxingMember
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665	Pingguo Aluminum Carbon Plant	Member			ach:PingguoAluminumCarbonPlantMember
666	Red Cliff Carbon Co., Ltd	Member			ach:RedCliffCarbonCoLtdMember
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671	Summary of analysis of cash flows in respect of acquisition	Concept (Text Block (HTML))	For Period		ach:ScheduleOfAnalysisOfCashFlowsInRespectOfAcquisitionTableTextBlock
672	Schedule of operating results and cash flows since the merger date to the end of the year	Concept (Text Block (HTML))	For Period		ach:ScheduleOperatingResultsAndCashFlowsTableTextBlock
673	33903 - Disclosure - DISPOSAL OF BUSINESSES (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureDisposalOfBusinessesTables
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682	Schedule of the details of the net assets disposed of	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory
683	Schedule of analysis of the cash flow of cash and cash equivalents in respect of the Disposal	Concept (Text Block (HTML))	For Period		ach:DisclosureOfCashFlowsOfDisposalGroupsClassifiedAsHeldForSaleTableTextBlock
684	34203 - Disclosure - COMMITMENTS (Tables)	Network	*	*	http://www.chalco.com.cn/role/DisclosureCommitmentsTables
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688	Schedule of commitments under operating leases	Concept (Text Block (HTML))	For Period		ach:DisclosureOfCommitmentsUnderOperatingLeasesTableTextBlock
689	Schedule of commitments to make capital contributions to the Group's joint ventures and associates	Concept (Text Block (HTML))	For Period		ach:DisclosureOfCommitmentsToMakeCapitalContributionsToGroupSJointVenturesAndAssociatesTableTextBlock
690	40101 - Disclosure - GENERAL INFORMATION (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureGeneralInformationDetails
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695	Baotou Aluminum	Member			ach:BaotouAluminumCompanyLimitedMember
696	Chalco Trading	Member			ach:ChinaAluminumInternationalTradingCompanyLimitedMember
697	Shanxi Huasheng	Member			ach:ShanxiHuashengAluminumCompanyLimitedMember
698	Shanxi New Material	Member			ach:ChalcoShanxiNewMaterialCompanyLimitedMember
699	Zunyi Aluminum Co., Ltd.	Member			ach:ZunyiAluminumCompanyLimitedMember
700	Shandong Huayu	Member			ach:ShandongHuayuAlloyMaterialsCompanyLimitedMember
701	Chalco Hong Kong	Member			ach:ChalcoHongKongLimitedMember
702	Chalco Mining	Member			ach:ChalcoMiningCompanyLimitedMember
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705	Guizhou Huajin	Member			ach:GuizhouHuajinAluminumCompanyLimitedMember
706	Chalco Zhengzhou Research Institute of Non-ferrous Metal Co., Ltd	Member			ach:ChalcoZhengzhouResearchInstituteOfNonFerrousMetalCompanyLimitedMember
707	Chalco Shandong	Member			ach:ChalcoShandongCompanyLimitedMember
708	Zhongzhou Aluminum	Member			ach:ChalcoZhongzhouAluminumCompanyLimitedMember
709	China Aluminum Logistics Group Corporation Co., Ltd.	Member			ach:ChinaAluminumLogisticsGroupCorporationCompanyLimitedMember
710	Xinghua Technology	Member			ach:ChinalcoShanxiJiaokouXinghuaTechnologyLimitedMember
711	Chinalco Shanghai	Member			ach:ChinalcoShanghaiCompanyLimitedMember
712	Shanxi Huarun	Member			ach:ShanxiChinaHuarunCompanyLimitedMember
713	Guizhou Huaren New Material	Member			ach:GuizhouHuarenNewMaterialCompanyLimitedMember
714	China Aluminum International Trading Group Co. Ltd.	Member			ach:ChinaAluminumInternationalTradingGroupCo.Ltd.Member
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720	40201 - Disclosure - BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBasisOfPreparationAndSignificantAccountingPoliciesDetails
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728	40202 - Disclosure - BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES - Impact of adopting IFRS 9 (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBasisOfPreparationAndSignificantAccountingPoliciesImpactOfAdoptingIfrs9Details
729	Disclosure of basis of presentation and significant accounting policies [Table]	Table	*	*	ach:DisclosureOfBasisOfPresentationAndSignificantAccountingPoliciesTable
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762	40203 - Disclosure - BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES - Impairment allowances under IAS 9 to ECL allowance under IFRS 9 (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBasisOfPreparationAndSignificantAccountingPoliciesImpairmentAllowancesUnderIas9ToEclAllowanceUnderIfrs9Details
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773	Re-measurement	Concept (Monetary)	As Of	Debit	ifrs-full:IncreaseDecreaseInFinancialAssetsArisingFromChangeInMeasurementAttributeFirstApplicationOfIFRS9
774	ECL allowances	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsCarryingAmountImmediatelyAfterInitialApplicationOfIFRS9
775	40204 - Disclosure - BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES - Impact transition to IFRS 9 (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBasisOfPreparationAndSignificantAccountingPoliciesImpactTransitionToIfrs9Details
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784	Retained earnings (Accumulated losses)	Member			ifrs-full:RetainedEarningsMember
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793	Recognition of expected credit losses	Concept (Monetary)	As Of	Debit	ifrs-full:IncreaseDecreaseInFinancialAssetsArisingFromChangeInMeasurementAttributeFirstApplicationOfIFRS9
794	At December 31,	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
795	40205 - Disclosure - BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES - Adoption of IFRS 15 (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBasisOfPreparationAndSignificantAccountingPoliciesAdoptionOfIfrs15Details
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805	40206 - Disclosure - BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES - Change on financial statements (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBasisOfPreparationAndSignificantAccountingPoliciesChangeOnFinancialStatementsDetails
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832	40207 - Disclosure - BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBasisOfPreparationAndSignificantAccountingPoliciesDetailss
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858	40301 - Disclosure - SIGNIFICANT ACCOUNTING ESTIMATES AND JUDGEMENTS (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureSignificantAccountingEstimatesAndJudgementsDetails
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879	Ownership interest in subsidiary held by the other majority shareholders (in percent)	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
880	40401 - Disclosure - REVENUE AND SEGMENT INFORMATION - Revenue (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureRevenueAndSegmentInformationRevenueDetails
881	Implied Table	Table	*	*	implied:Table
882	REVENUE AND SEGMENT INFORMATION	Abstract			ifrs-full:DisclosureOfOperatingSegmentsAbstract
883	Revenue	Abstract			ifrs-full:RevenueAbstract
884	Sales of goods (net of value-added tax)	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromSaleOfGoods
885	Revenue from rendering of services	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromRenderingOfServices
886	Rental income	Concept (Monetary)	For Period	Credit	ifrs-full:RentalIncome
887	Total revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
888	40402 - Disclosure - REVENUE AND SEGMENT INFORMATION - Disaggregated revenue (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureRevenueAndSegmentInformationDisaggregatedRevenueDetails
889	Disclosure of operating segments [table]	Table	*	*	ifrs-full:DisclosureOfOperatingSegmentsTable
890	Segments [axis]	Axis			ifrs-full:SegmentsAxis
891	Segments [member]	Member			ifrs-full:SegmentsMember
892	Alumina	Member			ach:AluminaSegmentMember
893	Primary aluminum	Member			ach:PrimaryAluminumSegmentMember
894	Energy	Member			ach:EnergySegmentMember
895	Trading	Member			ach:TradingSegmentMember
896	Corporate and other operating segments	Member			ach:CorporateAndOtherOperatingSegmentsMember
897	Segment consolidation items [axis]	Axis			ifrs-full:SegmentConsolidationItemsAxis
898	Entity's total for segment consolidation items [member]	Member			ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
899	Operating segment	Member			ifrs-full:OperatingSegmentsMember
900	Inter-segment elimination	Member			ifrs-full:EliminationOfIntersegmentAmountsMember
901	Products and services [axis]	Axis			ifrs-full:ProductsAndServicesAxis
902	Products and services [member]	Member			ifrs-full:ProductsAndServicesMember
903	Goods or Services	Member			ach:ProductOrServiceMember
904	Sales of goods	Member			ach:IfrsProductMember
905	Rendering of services	Member			ach:IfrsServiceMember
906	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
907	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
908	Mainland China	Member			ifrs-full:CountryOfDomicileMember
909	Outside of Mainland China	Member			ifrs-full:ForeignCountriesMember
910	Timing of transfer of goods or services [axis]	Axis			ifrs-full:TimingOfTransferOfGoodsOrServicesAxis
911	Timing of transfer of goods or services [member]	Member			ifrs-full:TimingOfTransferOfGoodsOrServicesMember
912	Timing of revenue recognition	Member			ach:TimingOfRevenueRecognitionMember
913	Goods transferred at a point in time	Member			ifrs-full:GoodsOrServicesTransferredAtPointInTimeMember
914	Services transferred over time	Member			ifrs-full:GoodsOrServicesTransferredOverTimeMember
915	Major customers [axis]	Axis			ifrs-full:MajorCustomersAxis
916	Customers [member]	Member			ifrs-full:MajorCustomersMember
917	Revenue from external customer	Member			ach:RevenueFromExternalCustomerMember
918	Maturity [axis]	Axis			ifrs-full:MaturityAxis
919	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
920	Within 1 year	Member			ifrs-full:NotLaterThanOneYearMember
921	More than one year	Member			ifrs-full:LaterThanOneYearMember
922	Disclosure of operating segments [line items]	LineItems			ifrs-full:DisclosureOfOperatingSegmentsLineItems
923	Sales of goods	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromSaleOfGoods
924	Rendering of services	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromRenderingOfServices
925	Total revenue	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromContractsWithCustomers
926	Sale of goods	Concept (Monetary)	As Of	Credit	ach:RevenueRecognizedFromSaleOfGoodsIncludedInContractLiabilities
927	Others	Concept (Monetary)	As Of	Credit	ach:OtherRevenueRecognizedIncludedInContractLiabilities
928	Revenue recognised that was included in contract liabilities at the beginning of the reporting period	Concept (Monetary)	As Of	Credit	ifrs-full:ContractLiabilities
929	Transaction price allocated to remaining performance obligations	Concept (Monetary)	As Of	Credit	ifrs-full:TransactionPriceAllocatedToRemainingPerformanceObligations
930	Period of remaining performance obligation	Concept (Text/String)	For Period		ifrs-full:ExplanationOfWhenEntityExpectsToRecogniseTransactionPriceAllocatedToRemainingPerformanceObligationsAsRevenue
931	40403 - Disclosure - REVENUE AND SEGMENT INFORMATION - Information about operating segments results (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureRevenueAndSegmentInformationInformationAboutOperatingSegmentsResultsDetails
932	Disclosure of operating segments [table]	Table	*	*	ifrs-full:DisclosureOfOperatingSegmentsTable
933	Segments [axis]	Axis			ifrs-full:SegmentsAxis
934	Segments [member]	Member			ifrs-full:SegmentsMember
935	Alumina	Member			ach:AluminaSegmentMember
936	Primary aluminum	Member			ach:PrimaryAluminumSegmentMember
937	Energy	Member			ach:EnergySegmentMember
938	Trading	Member			ach:TradingSegmentMember
939	Corporate and other operating segments	Member			ach:CorporateAndOtherOperatingSegmentsMember
940	Segment consolidation items [axis]	Axis			ifrs-full:SegmentConsolidationItemsAxis
941	Entity's total for segment consolidation items [member]	Member			ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
942	Operating segment	Member			ifrs-full:OperatingSegmentsMember
943	Inter-segment elimination	Member			ifrs-full:EliminationOfIntersegmentAmountsMember
944	Products and services [axis]	Axis			ifrs-full:ProductsAndServicesAxis
945	Products and services [member]	Member			ifrs-full:ProductsAndServicesMember
946	Self-produced alumina	Member			ach:AluminaProductMember
947	Self-produced primary aluminum	Member			ach:PrimaryAluminumProductMember
948	Self-produced other products	Member			ach:OtherProductsMember
949	Major customers [axis]	Axis			ifrs-full:MajorCustomersAxis
950	Customers [member]	Member			ifrs-full:MajorCustomersMember
951	Revenue from external customer	Member			ach:RevenueFromExternalCustomerMember
952	Disclosure of operating segments [line items]	LineItems			ifrs-full:DisclosureOfOperatingSegmentsLineItems
953	Segment information	Abstract			ach:SegmentInformationAbstract
954	Number of reportable operating segments	Concept (Integer)	For Period		ach:IfrsNumberOfReportableSegments
955	Inter-segment revenue	Concept (Monetary)	For Period	Debit	ach:InterSegmentRevenue
956	Sales of self- produced products	Concept (Monetary)	For Period	Credit	ach:SalesOfSelfProducedProducts
957	Sales of products sourced from external suppliers	Concept (Monetary)	For Period	Credit	ach:SalesOfProductsSourcedFromExternalSuppliers
958	Total revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
959	Total revenue	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromContractsWithCustomers
960	Segment profit/(loss) before income tax	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
961	Income tax benefit/(expense)	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
962	Profit for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
963	Finance income	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncome
964	Finance costs	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
965	Share of profits and losses of joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod
966	Share of profits and losses of associates	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
967	Amortization of land use rights	Concept (Monetary)	For Period	Debit	ach:AmortizationOfLandUseRights
968	Depreciation and amortization (excluding the amortization of land use rights)	Concept (Monetary)	For Period	Debit	ach:DepreciationAndAmortizationExcludingAmortizationOfLandUseRights
969	Gain on disposal of property, plant and equipment and land use rights	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnDisposalsOfPropertyPlantAndEquipment
970	Impairment of property, plant and equipment	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
971	Changes in fair value gains and losses	Concept (Monetary)	For Period	Credit	ach:ChangesInFairValueGainsAndLosses
972	Unrealized gains (loss) on future, forward and option contracts, net	Concept (Monetary)	For Period	Credit	ach:UnrealizedGainsLossOnFuturesForwardAndOptionContractsNet
973	Realised gain/(loss) on futures, forward and option contracts, net	Concept (Monetary)	For Period	Credit	ach:RealisedGainLossOnFuturesForwardAndOptionContractsNet
974	Gain (loss) on deemed disposal and disposal of subsidiaries	Concept (Monetary)	For Period	Credit	ach:GainLossOnDeemedDisposalAndDisposalOfSubsidiaries
975	Gain on disposal of associates	Concept (Monetary)	For Period	Credit	ach:GainsOnDisposalsOfInvestmentsAssociates
976	Dividends from available for sale financial assets	Concept (Monetary)	For Period	Credit	ach:DividendsFromAvailableForSaleFinancialAssets
977	Impairment losses	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill
978	Change for impairment of inventories	Concept (Monetary)	For Period	Debit	ifrs-full:WritedownsReversalsOfInventories
979	Reversal of/(provision for) impairment of receivables, net of bad debts recovered	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossTradeReceivables
980	Gain (loss) on disposal of associates	Concept (Monetary)	For Period	Credit	ach:GainLossOnDisposalOfAssociates
981	Gain on disposal and dividends of available for sale	Concept (Monetary)	For Period	Credit	ach:GainOnDisposalAndDividendsOfAvailableForSale
982	Gain on previously held equity interest remeasured at a acquisition-date fair value	Concept (Monetary)	For Period	Credit	ach:GainOnPreviouslyHeldEquityInterestRemeasuredAtAcquisitionDateFairValue
983	Investments in joint ventures	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod
984	Investments in associates	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
985	Capital expenditure in:	Abstract			ach:CapitalExpenditureAbstract
986	Intangible assets	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
987	Land use rights	Concept (Monetary)	For Period	Debit	ach:AdditionsOtherThanThroughBusinessCombinationsLandUseRightsAndLeaseholdLand
988	Investment properties	Concept (Monetary)	For Period	Credit	ach:CapitalExpenditureInInvestmentProperty
989	Property, plant and equipment	Concept (Monetary)	For Period	Debit	ach:AdditionsOtherThanThroughBusinessCombinationsAndSaleLeasebackContractsPropertyPlantAndEquipment
990	40404 - Disclosure - REVENUE AND SEGMENT INFORMATION - Information about operating segments assets and liabilities (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureRevenueAndSegmentInformationInformationAboutOperatingSegmentsAssetsAndLiabilitiesDetails
991	Disclosure of operating segments [table]	Table	*	*	ifrs-full:DisclosureOfOperatingSegmentsTable
992	Segments [axis]	Axis			ifrs-full:SegmentsAxis
993	Segments [member]	Member			ifrs-full:SegmentsMember
994	Alumina	Member			ach:AluminaSegmentMember
995	Primary aluminum	Member			ach:PrimaryAluminumSegmentMember
996	Energy	Member			ach:EnergySegmentMember
997	Trading	Member			ach:TradingSegmentMember
998	Corporate and other operating segments	Member			ach:CorporateAndOtherOperatingSegmentsMember
999	Segment consolidation items [axis]	Axis			ifrs-full:SegmentConsolidationItemsAxis
1000	Entity's total for segment consolidation items [member]	Member			ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
1001	Operating segment	Member			ifrs-full:OperatingSegmentsMember
1002	Inter-segment elimination	Member			ifrs-full:EliminationOfIntersegmentAmountsMember
1003	Corporate and other unallocated assets	Member			ifrs-full:UnallocatedAmountsMember
1004	Disclosure of operating segments [line items]	LineItems			ifrs-full:DisclosureOfOperatingSegmentsLineItems
1005	Assets	Abstract			ifrs-full:AssetsAbstract
1006	Assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
1007	Elimination of inter-segment receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeReceivables
1008	Other eliminations	Concept (Monetary)	As Of	Debit	ifrs-full:OtherAssets
1009	Deferred tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
1010	Prepaid income tax	Concept (Monetary)	As Of	Debit	ach:PrepaidIncomeTax
1011	Liabilities	Abstract			ifrs-full:LiabilitiesAbstract
1012	Liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
1013	Elimination of inter-segment payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayablesToTradeSuppliers
1014	Deferred tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
1015	Income tax payable	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentTaxLiabilitiesCurrent
1016	40405 - Disclosure - REVENUE AND SEGMENT INFORMATION - Geographical information of the operating segments (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureRevenueAndSegmentInformationGeographicalInformationOfOperatingSegmentsDetails
1017	Disclosure of geographical areas [table]	Table	*	*	ifrs-full:DisclosureOfGeographicalAreasTable
1018	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1019	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1020	Mainland China	Member			ifrs-full:CountryOfDomicileMember
1021	Outside of Mainland China	Member			ifrs-full:ForeignCountriesMember
1022	Counterparties [axis]	Axis			ifrs-full:CounterpartiesAxis
1023	Counterparties [member]	Member			ifrs-full:CounterpartiesMember
1024	PRC government including Chinalco	Member			ach:PeopleSRepublicOfChinaGovernmentIncludingChinalcoMember
1025	Disclosure of geographical areas [line items]	LineItems			ifrs-full:DisclosureOfGeographicalAreasLineItems
1026	Revenue from external customers	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromContractsWithCustomers
1027	Non-current assets (excluding financial assets and deferred tax assets)	Concept (Monetary)	For Period	Debit	ach:NonCurrentAssetsExcludingFinancialAssetsAndDeferredTaxAssets
1028	Revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
1029	40501 - Disclosure - INTANGIBLE ASSETS (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureIntangibleAssetsDetails
1030	Disclosure of reconciliation of changes in intangible assets and goodwill [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable
1031	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
1032	Intangible assets and goodwill [member]	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
1033	Goodwill	Member			ifrs-full:GoodwillMember
1034	Mining rights and others	Member			ach:MiningRightsAndOthersMember
1035	Mineral exploration rights	Member			ach:MineralExplorationRightsMember
1036	Computer software, production quota and others	Member			ach:ComputerSoftwareProductionQuotaAndOthersMember
1037	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1038	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1039	Gross	Member			ifrs-full:GrossCarryingAmountMember
1040	Accumulated amortization and impairment	Member			ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
1041	Information about reconciliation of changes in intangible assets and goodwill	LineItems			ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems
1042	Reconciliation of changes in intangible assets and goodwill	Abstract			ifrs-full:ReconciliationOfChangesInIntangibleAssetsAndGoodwillAbstract
1043	Intangible assets and goodwill at beginning of period	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
1044	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
1045	Acquisition of a subsidiary	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill
1046	Disposal	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsIntangibleAssetsAndGoodwill
1047	Disposal of subsidiaries	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseThroughLossOfControlOfSubsidiaryIntangibleAssetsAndGoodwill
1048	Amortization	Concept (Monetary)	For Period		ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
1049	Transfer from property, plant and equipment	Concept (Monetary)	For Period	Debit	ach:IncreaseThroughTransferFromPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwill
1050	Impairment losses	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill
1051	Reclassification	Concept (Monetary)	For Period	Credit	ach:DecreaseThroughReclassificationToOperatingLeasePrepaymentsIntangibleAssetsOtherThanGoodwill
1052	Currency translation differences	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill
1053	Intangible assets and goodwill at end of period	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
1054	40502 - Disclosure - INTANGIBLE ASSETS - Amortization expenses of intangible assets (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureIntangibleAssetsAmortizationExpensesOfIntangibleAssetsDetails
1055	Disclosure of amortisation expenses of intangible assets [Table]	Table	*	*	ach:DisclosureOfAmortisationExpensesOfIntangibleAssetsTable
1056	ifrs Income Statement Location [Axis]	Axis			ach:IfrsIncomeStatementLocationAxis
1057	ifrs Income Statement Location [Domain]	Member			ach:IfrsIncomeStatementLocationDomain
1058	Cost of sales	Member			ach:IfrsCostOfSalesMember
1059	General and administrative expenses	Member			ach:IfrsGeneralAndAdministrativeExpenseMember
1060	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
1061	Intangible assets and goodwill [member]	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
1062	Mining rights	Member			ifrs-full:MiningRightsMember
1063	Amortisation expenses of intangible assets recognized in profit or loss	LineItems			ach:DisclosureOfDetailedInformationAboutAmortisationExpensesOfIntangibleAssetsLineItems
1064	Amortization expenses of intangible assets	Concept (Monetary)	For Period		ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
1065	Carrying amount of pledged intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsPledgedAsSecurityForLiabilities
1066	Mining rights carrying value	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsOtherThanGoodwill
1067	Carrying value to total asset value (as a percent)	Concept (Pure)	As Of		ach:CarryingValueToTotalAssetValueRatio
1068	40503 - Disclosure - INTANGIBLE ASSETS - Impairment testing of goodwill (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureIntangibleAssetsImpairmentTestingOfGoodwillDetails
1069	Disclosure of information for cash-generating units [table]	Table	*	*	ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesTable
1070	Segments [axis]	Axis			ifrs-full:SegmentsAxis
1071	Segments [member]	Member			ifrs-full:SegmentsMember
1072	Alumina	Member			ach:AluminaMember
1073	Primary aluminium	Member			ach:PrimaryAluminiumMember
1074	Cash-generating units [axis]	Axis			ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
1075	Entity's total for cash-generating units [member]	Member			ifrs-full:EntitysTotalForCashgeneratingUnitsMember
1076	CGU	Member			ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesMember
1077	Qinghai Branch	Member			ach:QinghaiBranchMember
1078	Guangxi Branch	Member			ach:GuangxiBranchMember
1079	Lanzhou Branch	Member			ach:LanzhouBranchMember
1080	PT. Nusapati Prima	Member			ach:Pt.NusapatiPrimaMember
1081	Shanxi Huaxing	Member			ach:ShanxiHuaxingDisposalGroupHeldForSaleMember
1082	Groups of CGUs according to operating segments	LineItems			ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesLineItems
1083	Goodwill	Concept (Monetary)	As Of	Debit	ifrs-full:Goodwill
1084	Pre-tax cash flow projections period approved by management	Concept (xbrli:durationItemType)	For Period		ach:PeriodOverWhichManagementHasProjectedCashFlows
1085	Estimated growth rate for cash flows beyond approved period	Concept (Percent)	As Of		ifrs-full:DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections
1086	Pre-tax rate that reflects specific risks related to CGUs and groups of CGUs as discount rate	Concept (Percent)	As Of		ifrs-full:DescriptionOfDiscountRatesAppliedToCashFlowProjections
1087	Impairment of goodwill	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill
1088	40601 - Disclosure - PROPERTY, PLANT AND EQUIPMENT (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosurePropertyPlantAndEquipmentDetails
1089	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1090	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1091	Property, plant and equipment [member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
1092	Buildings	Member			ifrs-full:BuildingsMember
1093	Machinery	Member			ifrs-full:MachineryMember
1094	Transportation facilities	Member			ach:TransportationFacilitiesMember
1095	Office and other equipment	Member			ifrs-full:OfficeEquipmentMember
1096	Construction in progress	Member			ifrs-full:ConstructionInProgressMember
1097	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1098	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1099	Gross	Member			ifrs-full:GrossCarryingAmountMember
1100	Accumulated amortization and impairment	Member			ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
1101	PROPERTY, PLANT AND EQUIPMENT	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1102	Property, plant and equipment at beginning of period	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1103	Reclassifications and internal transfers	Concept (Monetary)	For Period	Debit	ach:IncreaseDecreaseThroughReclassificationsAndInternalTransfersPropertyPlantAndEquipment
1104	Government grants	Concept (Monetary)	For Period	Credit	ach:DecreaseThroughTransferToGovernmentGrants
1105	Transfer to intangible assets (note 5)	Concept (Monetary)	For Period	Credit	ach:DecreaseThroughTransferToIntangibleAssets
1106	Transfer to land use rights (note 8)	Concept (Monetary)	For Period	Credit	ach:DecreaseThroughTransferToLandUseRightsAndLeaseholdLand
1107	Transfer to investment properties (note 7)	Concept (Monetary)	For Period	Credit	ach:TransferToInvestmentProperties
1108	Transfer from investment properties (note 7)	Concept (Monetary)	For Period	Debit	ach:IncreaseThroughTransfersFromInvestmentProperty
1109	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
1110	Acquisition of subsidiaries	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment
1111	Disposal of subsidiaries	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseThroughLossOfControlOfSubsidiaryPropertyPlantAndEquipment
1112	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsPropertyPlantAndEquipment
1113	Depreciation	Concept (Monetary)	For Period		ifrs-full:DepreciationPropertyPlantAndEquipment
1114	Impairment loss on property, plant and equipment	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
1115	Currency translation differences	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
1116	Property, plant and equipment at end of period	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1117	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1118	40602 - Disclosure - PROPERTY, PLANT AND EQUIPMENT - Depreciation expenses (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosurePropertyPlantAndEquipmentDepreciationExpensesDetails
1119	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1120	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1121	Property, plant and equipment [member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
1122	Buildings	Member			ifrs-full:BuildingsMember
1123	Ownership certificates of buildings	Member			ach:OwnershipCertificatesOfBuildingsMember
1124	Machinery	Member			ifrs-full:MachineryMember
1125	Construction in progress	Member			ifrs-full:ConstructionInProgressMember
1126	Machinery and construction in progress held under finance leases	Member			ach:MachineryAndConstructionInProgressUnderFinanceLeasesMember
1127	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1128	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1129	Accumulated amortization and impairment	Member			ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
1130	ifrs Income Statement Location [Axis]	Axis			ach:IfrsIncomeStatementLocationAxis
1131	ifrs Income Statement Location [Domain]	Member			ach:IfrsIncomeStatementLocationDomain
1132	Cost of sales	Member			ach:IfrsCostOfSalesMember
1133	General and administrative expenses	Member			ach:IfrsGeneralAndAdministrativeExpenseMember
1134	Selling and distribution expenses	Member			ach:SellingAndDistributionExpensesMember
1135	Range [axis]	Axis			ifrs-full:RangeAxis
1136	Ranges [member]	Member			ifrs-full:RangesMember
1137	Minimum	Member			ifrs-full:BottomOfRangeMember
1138	Maximum	Member			ifrs-full:TopOfRangeMember
1139	Disclosure of detailed information about property, plant and equipment	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1140	Depreciation and amortisation expense	Abstract			ifrs-full:DepreciationAndAmortisationExpenseAbstract
1141	Depreciation expenses	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationExpense
1142	Ownership certificates of buildings	Abstract			ach:OwnershipCertificatesOfBuildingsAbstract
1143	Net carrying value	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1144	Carrying value to total asset value (as a percent)	Concept (Pure)	As Of		ach:CarryingValueToTotalAssetValueRatio
1145	Interest attributable to the construction of property, plant and equipment	Abstract			ifrs-full:BorrowingCostsAbstract
1146	Interest expenses arising from borrowings attributable to the construction of property, plant and equipment	Concept (Monetary)	For Period	Debit	ifrs-full:BorrowingCostsRecognisedAsExpense
1147	Capitalization rate during the year	Concept (Percent)	For Period		ifrs-full:CapitalisationRateOfBorrowingCostsEligibleForCapitalisation
1148	Additional information	Abstract			ifrs-full:AdditionalInformationAbstract
1149	Carrying value of temporarily idle property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentTemporarilyIdle
1150	Fixed assets held under finance leases	Concept (Monetary)	As Of	Debit	ifrs-full:RecognisedFinanceLeaseAsAssets
1151	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentPledgedAsSecurity
1152	40603 - Disclosure - PROPERTY, PLANT AND EQUIPMENT - Impairment tests for property, plant and equipment (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosurePropertyPlantAndEquipmentImpairmentTestsForPropertyPlantAndEquipmentDetails
1153	Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [table]	Table	*	*	ifrs-full:DisclosureOfInformationForEachMaterialImpairmentLossRecognisedOrReversedForIndividualAssetOrCashgeneratingUnitTable
1154	Individual assets or cash-generating units [axis]	Axis			ifrs-full:IndividualAssetsOrCashgeneratingUnitsAxis
1155	Entity's total for individual assets or cash-generating units [member]	Member			ifrs-full:EntitysTotalForIndividualAssetsOrCashgeneratingUnitsMember
1156	CGU	Member			ifrs-full:IndividualAssetsOrCashgeneratingUnitsMember
1157	Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]	LineItems			ifrs-full:DisclosureOfInformationForEachMaterialImpairmentLossRecognisedOrReversedForIndividualAssetOrCashgeneratingUnitLineItems
1158	Period of financial budgets approved by management	Concept (xbrli:durationItemType)	For Period		ach:PeriodManagementHasFinancialBudgetsApproved
1159	Pre-tax and non-inflation rate that reflects specific risks related to CGUs as discount rates (as a percent)	Concept (Percent)	As Of		ifrs-full:DescriptionOfDiscountRatesUsedInCurrentEstimateOfValueInUse
1160	Recoverable amounts for property, plant and equipment about to be disposed or abandoned, and impairment losses	Concept (Monetary)	As Of	Debit	ifrs-full:RecoverableAmountOfAssetOrCashgeneratingUnit
1161	40701 - Disclosure - INVESTMENT PROPERTIES (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInvestmentPropertiesDetails
1162	Disclosure of detailed information about investment property [table]	Table	*	*	ifrs-full:DisclosureOfInvestmentPropertyTable
1163	Types of investment property [axis]	Axis			ifrs-full:TypesOfInvestmentPropertyAxis
1164	Investment property [member]	Member			ifrs-full:InvestmentPropertyMember
1165	Buildings	Member			ifrs-full:BuildingsMember
1166	Ownership certificates of investment properties	Member			ach:OwnershipCertificatesOfInvestmentPropertiesMember
1167	Land use right	Member			ach:LandUseRightsMember
1168	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1169	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1170	Gross	Member			ifrs-full:GrossCarryingAmountMember
1171	Accumulated amortization and impairment	Member			ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
1172	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
1173	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
1174	At fair values	Member			ifrs-full:AtFairValueMember
1175	INVESTMENT PROPERTIES	LineItems			ifrs-full:DisclosureOfInvestmentPropertyLineItems
1176	Investment properties	Abstract			ifrs-full:ReconciliationOfChangesInInvestmentPropertyAbstract
1177	Investment properties at beginning of period	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentProperty
1178	Transfer from property, plant and equipment and land use rights (note 6) (note 8)	Concept (Monetary)	For Period	Debit	ach:IncreaseThroughTransfersFromPropertyPlantAndEquipmentAndLandUseRightInvestmentProperties
1179	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsInvestmentProperty
1180	Transfer to property, plant and equipment (note 6)	Concept (Monetary)	For Period	Credit	ach:DecreaseThroughTransferToPropertyPlantAndEquipment
1181	Depreciation	Concept (Monetary)	For Period		ifrs-full:DepreciationInvestmentProperty
1182	Investment properties at end of period	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentProperty
1183	Percentage of investment properties to total asset	Concept (Percent)	As Of		ach:PercentageOfInvestmentPropertiesToTotalAsset
1184	40801 - Disclosure - LAND USE RIGHTS AND LEASEHOLD LAND (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureLandUseRightsAndLeaseholdLandDetails
1185	Disclosure of recognised finance lease as assets by lessee [table]	Table	*	*	ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeTable
1186	Classes of intangible assets other than goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
1187	Intangible assets other than goodwill [member]	Member			ifrs-full:IntangibleAssetsOtherThanGoodwillMember
1188	Land use rights and leasehold land	Member			ach:LandUseRightsAndLeaseholdLandMember
1189	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1190	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1191	PRC	Member			country:CN
1192	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1193	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1194	Less than 10 years	Member			ach:NotLaterThanTenYearMember
1195	Between 10 to 50 years	Member			ach:LaterThanTenYearsAndNotLaterThanFiftyYearsMember
1196	Over 50 years	Member			ach:LaterThanFiftyYearsMember
1197	COMMITMENTS	LineItems			ifrs-full:DisclosureOfAmountsToBeRecoveredOrSettledAfterTwelveMonthsForClassesOfAssetsAndLiabilitiesThatContainAmountsToBeRecoveredOrSettledBothNoMoreAndMoreThanTwelveMonthsAfterReportingDateLineItems
1198	Operating leases :	Abstract			ach:OperatingLeasesAbstract
1199	Leases	Concept (Monetary)	As Of	Debit	ach:LandUseRights
1200	40802 - Disclosure - LAND USE RIGHTS AND LEASEHOLD LAND - Operating leases prepayments (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureLandUseRightsAndLeaseholdLandOperatingLeasesPrepaymentsDetails
1201	Disclosure of detailed information about intangible assets [table]	Table	*	*	ifrs-full:DisclosureOfIntangibleAssetsTable
1202	Classes of intangible assets other than goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
1203	Intangible assets other than goodwill [member]	Member			ifrs-full:IntangibleAssetsOtherThanGoodwillMember
1204	Land use rights and leasehold land	Member			ach:LandUseRightsAndLeaseholdLandMember
1205	Disclosure of detailed information about intangible assets [line items]	LineItems			ifrs-full:DisclosureOfIntangibleAssetsLineItems
1206	Operating leases prepayments	Abstract			ach:OperatingLeasesPrepaymentsAbstract
1207	As at January 1	Concept (Monetary)	As Of	Debit	ach:LandUseRights
1208	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
1209	Acquisition of a subsidiary	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill
1210	Transfer from property, plant and equipment (note 6)	Concept (Monetary)	For Period	Debit	ach:IncreaseThroughTransfersFromPropertyPlantAndEquipment
1211	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsIntangibleAssetsAndGoodwill
1212	Government grants	Concept (Monetary)	For Period	Credit	ach:DecreaseThroughTransferToGovernmentGrants
1213	Disposal of subsidiaries	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseThroughLossOfControlOfSubsidiaryIntangibleAssetsAndGoodwill
1214	Transfer to investment properties	Concept (Monetary)	For Period	Credit	ach:DecreaseThroughTransfersToInvestmentPropertiesIntangibleAssetsAndGoodwill
1215	Amortization	Concept (Monetary)	For Period		ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
1216	As at December 31	Concept (Monetary)	As Of	Debit	ach:LandUseRights
1217	40803 - Disclosure - LAND USE RIGHTS AND LEASEHOLD LAND - Notes (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureLandUseRightsAndLeaseholdLandNotesDetails
1218	Disclosure of detailed information about intangible assets [table]	Table	*	*	ifrs-full:DisclosureOfIntangibleAssetsTable
1219	Classes of intangible assets other than goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
1220	Intangible assets other than goodwill [member]	Member			ifrs-full:IntangibleAssetsOtherThanGoodwillMember
1221	Land use right	Member			ach:LandUseRightsMember
1222	Certificates of land use rights	Member			ach:CertificatesOfLandUseRightsMember
1223	Land parcels	Member			ach:LandParcelsUnderCertificatesOfLandUseRightsMember
1224	Land use rights and leasehold land	Member			ach:LandUseRightsAndLeaseholdLandMember
1225	Disclosure of detailed information about intangible assets [line items]	LineItems			ifrs-full:DisclosureOfIntangibleAssetsLineItems
1226	Note for land use rights and leasehold land	Abstract			ach:NoteForLandUseRightsAndLeaseholdLandAbstract
1227	Amortization	Concept (Monetary)	For Period		ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
1228	Land use rights	Concept (Monetary)	As Of	Debit	ach:LandUseRights
1229	Carrying value to total asset value (as a percent)	Concept (Pure)	For Period		ach:PercentageOfCarryingValueOfLandParcelsOnTotalAssetValue
1230	Carrying amount of pledged intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsPledgedAsSecurityForLiabilities
1231	40901 - Disclosure - INVESTMENTS IN JOINT VENTURES AND ASSOCIATES (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInvestmentsInJointVenturesAndAssociatesDetails
1232	Disclosure of joint ventures [table]	Table	*	*	ifrs-full:DisclosureOfJointVenturesTable
1233	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1234	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1235	Joint venture	Member			ifrs-full:JointVenturesMember
1236	INVESTMENTS IN JOINT VENTURES AND ASSOCIATES	LineItems			ifrs-full:DisclosureOfJointVenturesLineItems
1237	Movements in investments in joint ventures	Abstract			ach:MovementsInInvestmentsInJointVenturesAbstract
1238	As at January 1	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod
1239	Capital injections	Concept (Monetary)	For Period	Debit	ach:CapitalInjectionsInAssociatesAndJointVentures
1240	A joint venture changed into a subsidiary (note 38 (k))	Concept (Monetary)	For Period	Credit	ach:TransmissionOfJointVentureIntoSubsidiary
1241	A subsidiary changed into a joint venture	Concept (Monetary)	For Period	Debit	ach:TransmissionOfSubsidiaryIntoJointVenture
1242	Share of profits and losses for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfContinuingOperationsOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1243	Share of changes in reserves	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfTotalComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1244	Cash dividends declared	Concept (Monetary)	For Period	Credit	ach:CashDividendsDeclaredAssociatesAndJointVentures
1245	Impairment	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLoss
1246	As at December 31	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod
1247	40902 - Disclosure - INVESTMENTS IN JOINT VENTURES AND ASSOCIATES - Joint ventures not individually material (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInvestmentsInJointVenturesAndAssociatesJointVenturesNotIndividuallyMaterialDetails
1248	Disclosure of joint ventures [table]	Table	*	*	ifrs-full:DisclosureOfJointVenturesTable
1249	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
1250	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
1251	Aggregate joint ventures not individually material	Member			ifrs-full:AggregatedIndividuallyImmaterialJointVenturesMember
1252	INVESTMENTS IN JOINT VENTURES AND ASSOCIATES	LineItems			ifrs-full:DisclosureOfJointVenturesLineItems
1253	Share of the joint ventures' profits and losses for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfContinuingOperationsOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1254	Share of the joint ventures' total comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfTotalComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1255	Aggregate carrying amount of the Group's investments in joint ventures	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod
1256	Proportionate interests in the joint ventures' capital commitments	Concept (Monetary)	As Of	Credit	ifrs-full:ShareOfContingentLiabilitiesIncurredJointlyWithOtherVenturers
1257	Material contingent liabilities relating to the Group's interests in the joint ventures and the joint ventures themselves	Concept (Monetary)	As Of	Credit	ifrs-full:ContingentLiabilitiesIncurredByVenturerInRelationToInterestsInJointVentures
1258	40903 - Disclosure - INVESTMENTS IN JOINT VENTURES AND ASSOCIATES - Investments in associates (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInvestmentsInJointVenturesAndAssociatesInvestmentsInAssociatesDetails
1259	Statement [Table]	Table	*	*	us-gaap:StatementTable
1260	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
1261	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
1262	Associates	Member			ifrs-full:AssociatesMember
1263	INVESTMENTS IN JOINT VENTURES AND ASSOCIATES	LineItems			ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
1264	Movements in investments in associates	Abstract			ach:MovementsInInvestmentsInAssociatesAbstract
1265	As at January 1	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
1266	Capital injections	Concept (Monetary)	For Period	Debit	ach:CapitalInjectionsInAssociatesAndJointVentures
1267	Deemed disposal of subsidiaries	Concept (Monetary)	For Period	Debit	ach:DeemedDisposalOfJointVenturesAndAssociatesUsingEquityMethod
1268	A subsidiary changed into an associate	Concept (Monetary)	For Period	Debit	ach:TransmissionOfSubsidiaryIntoAssociate
1269	Associates changed into subsidiaries	Concept (Monetary)	For Period	Credit	ach:InvestmentInAssociatesAndJointVenturesReclassifiedToAvailableForSaleFinancialAssets
1270	Disposal	Concept (Monetary)	For Period	Credit	ach:DisposalAssociatesAndJointVentures
1271	Share of profits and losses for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfContinuingOperationsOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1272	Cash dividends declared	Concept (Monetary)	For Period	Credit	ach:CashDividendsDeclaredAssociatesAndJointVentures
1273	Share of changes in reserves	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfTotalComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1274	As at December 31	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
1275	40904 - Disclosure - INVESTMENTS IN JOINT VENTURES AND ASSOCIATES - Associates not individually material (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInvestmentsInJointVenturesAndAssociatesAssociatesNotIndividuallyMaterialDetails
1276	Disclosure of associates [table]	Table	*	*	ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
1277	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
1278	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
1279	Associates	Member			ifrs-full:AssociatesMember
1280	Aggregate associates that are not individually material	Member			ifrs-full:AggregatedIndividuallyImmaterialAssociatesMember
1281	INVESTMENTS IN JOINT VENTURES AND ASSOCIATES	LineItems			ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
1282	Investment in an associate	Concept (Monetary)	As Of	Debit	ach:InvestmentsAccountedForUsingEquityMethodPledgedAsSecurityForLiabilities
1283	Share of the associates' profits and losses	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfContinuingOperationsOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1284	Share of the associates' total comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfTotalComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1285	Aggregate carrying amount of the Group's investments in the associates	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod
1286	Material contingent liabilities relating to the Group's interests in the associates and the associates themselves	Concept (Monetary)	As Of	Credit	ifrs-full:ContingentLiabilitiesIncurredInRelationToInterestsInAssociates
1287	41001 - Disclosure - EQUITY INVESTMENTS DESIGNATED AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME/AVAILABLE-FOR-SALE FINANCIAL INVESTMENTS (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureEquityInvestmentsDesignatedAtFairValueThroughOtherComprehensiveIncomeAvailableForSaleFinancialInvestmentsDetails
1288	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
1289	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
1290	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
1291	Fair value model	Member			ifrs-full:FairValueModelMember
1292	At fair values	Member			ifrs-full:AtFairValueMember
1293	Stated at cost	Member			ifrs-full:AtCostMember
1294	Counterparties [axis]	Axis			ifrs-full:CounterpartiesAxis
1295	Counterparties [member]	Member			ifrs-full:CounterpartiesMember
1296	BOCOMM TRUST	Member			ach:BocommTrustMember
1297	Ifrs Legal entity [axis]	Axis			ach:IfrsLegalEntityAxis
1298	IFRS Entity [Domain]	Member			ach:IfrsEntityDomain
1299	Size industry investment fund	Member			ach:SizeIndustryInvestmentFundMember
1300	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1301	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
1302	Available-for-sale financial investments	Member			ach:AvailableForSaleFinancialInvestmentsMember
1303	Categories of financial assets [axis]	Axis			ifrs-full:CategoriesOfFinancialAssetsAxis
1304	Financial assets, category [member]	Member			ifrs-full:FinancialAssetsCategoryMember
1305	Financial assets available-for-sale	Member			ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
1306	Disclosure of financial assets [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsLineItems
1307	Equity investments designated at fair value through other comprehensive income	Abstract			ach:EquityInvestmentsDesignatedAtFairValueThroughOtherComprehensiveIncomeAbstract
1308	Listed equity investments	Concept (Monetary)	As Of	Debit	ach:FairValueOfInvestmentInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeListedEquityInvestments
1309	Unlisted investments	Concept (Monetary)	As Of	Debit	ach:FairValueOfInvestmentInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeUnlistedEquityInvestments
1310	Equity investment designated at fair value through other comprehensive income	Concept (Monetary)	As Of	Debit	ach:FairValueOfInvestmentInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncome
1311	Non current portion	Abstract			ach:NonCurrentPortionAvailableForSaleAbstract
1312	Listed equity investments	Concept (Monetary)	As Of	Debit	ach:NonCurrentFinancialAssetsAvailableForSaleListedEquityInvestments
1313	Unlisted equity investments	Concept (Monetary)	For Period	Debit	ach:NonCurrentFinancialAssetsAvailableForSaleUnlistedEquityInvestments
1314	Other unlisted investments	Concept (Monetary)	As Of	Debit	ach:NonCurrentFinancialAssetsAvailableForSaleOtherUnlistedEquityInvestments
1315	Less: provision for impairment	Concept (Monetary)	As Of	Credit	ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1316	Available-for-sale financial investments, non current	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentFinancialAssetsAvailableforsale
1317	Gross loss (gain) of available-for-sale investments recognized in other comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:FairValueGainsLossesOnFinancialAssetsReclassifiedOutOfAvailableforsaleFinancialAssetsRecognisedInOtherComprehensiveIncome
1318	Capital contribution commitment	Concept (Monetary)	As Of	Credit	ifrs-full:CapitalCommitments
1319	Investment to fund	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociates
1320	Number of investments	Concept (Integer)	For Period		ach:NumberOfInvestments
1321	Number of associates	Concept (Integer)	For Period		ach:NumberOfAssociates
1322	Number of joint ventures	Concept (Integer)	For Period		ach:NumberOfJointVentures
1323	Total capital contribution	Concept (Monetary)	For Period	Credit	ach:TotalCapitalContribution
1324	Capital contribution	Concept (Monetary)	For Period	Credit	ach:CapitalContribution
1325	41101 - Disclosure - DEFERRED TAX - Assets (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureDeferredTaxAssetsDetails
1326	Disclosure of temporary difference, unused tax losses and unused tax credits [table]	Table	*	*	ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
1327	Temporary difference, unused tax losses and unused tax credits [axis]	Axis			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1328	Temporary difference, unused tax losses and unused tax credits [member]	Member			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1329	Temporary difference	Member			ifrs-full:TemporaryDifferenceMember
1330	Provision for impairment	Member			ach:ProvisionForImpairmentMember
1331	Accrued expenses	Member			ach:AccruedExpensesMember
1332	Tax losses	Member			ifrs-full:UnusedTaxLossesMember
1333	Unrealized profit at consolidation	Member			ach:UnrealizedProfitAtConsolidationMember
1334	Others	Member			ifrs-full:OtherTemporaryDifferencesMember
1335	Disclosure of temporary difference, unused tax losses and unused tax credits [line items]	LineItems			ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
1336	Movements in deferred tax assets:	Abstract			ach:ReconciliationOfChangesInDeferredTaxAssetAbstract
1337	As at January 1,	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
1338	Acquisition of subsidiaries	Concept (Monetary)	For Period	Credit	ach:IncreaseDecreaseThroughBusinessCombinationsDeferredTaxAsset
1339	(Charged)/credited to profit or loss	Concept (Monetary)	For Period		ach:DeferredTaxExpenseIncomeRecognisedInProfitOrLossDeferredTaxAsset
1340	Disposal of subsidiaries	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughLossOfControlOfSubsidiaryDeferredTaxLiabilityAsset
1341	As at December 31,	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
1342	41102 - Disclosure - DEFERRED TAX - Liabilities (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureDeferredTaxLiabilitiesDetails
1343	Disclosure of temporary difference, unused tax losses and unused tax credits [table]	Table	*	*	ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
1344	Temporary difference, unused tax losses and unused tax credits [axis]	Axis			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1345	Temporary difference, unused tax losses and unused tax credits [member]	Member			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1346	Temporary difference	Member			ifrs-full:TemporaryDifferenceMember
1347	Interest capitalization	Member			ach:InterestCapitalizationMember
1348	Fair value changes of financial assets	Member			ach:FairValueChangesOfFinancialAssetsMember
1349	Depreciation and amortization	Member			ach:DepreciationAndAmortisationMember
1350	Fair value adjustments arising from acquisition of subsidiaries	Member			ach:FairValueAdjustmentsFromAcquisitionOfSubsidiariesMember
1351	Investment in a subsidiary	Member			ach:InvestmentInSubsidiaryMember
1352	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
1353	Currently stated [member]	Member			ifrs-full:RestatedMember
1354	Before change in accounting policy	Member			ifrs-full:PreviouslyStatedMember
1355	Disclosure of temporary difference, unused tax losses and unused tax credits [line items]	LineItems			ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
1356	Movements in deferred tax liabilities:	Abstract			ach:ReconciliationOfChangesInDeferredTaxLiabilityAbstract
1357	As at January 1,	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
1358	Changes in accounting policies	Concept (Monetary)	For Period	Debit	ach:IncreaseDecreaseThroughChangesInAccountingPolicies
1359	Exchange realignment	Concept (Monetary)	For Period	Credit	ach:IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiability
1360	Credited to other comprehensive income	Concept (Monetary)	For Period		ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
1361	Acquisition of a subsidiaries	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughBusinessCombinationsDeferredTaxLiabilityAsset
1362	(Credited)/charged to profit or loss	Concept (Monetary)	For Period		ach:DeferredTaxExpenseIncomeRecognisedInProfitOrLossDeferredTaxLiability
1363	As at December 31,	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
1364	41103 - Disclosure - DEFERRED TAX - Balances (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureDeferredTaxBalancesDetails
1365	Implied Table	Table	*	*	implied:Table
1366	DEFERRED TAX	Abstract			ifrs-full:DeferredTaxAssetsAndLiabilitiesAbstract
1367	Analysis of the deferred tax balances	Abstract			ach:AnalysisOfDeferredTaxBalancesAbstract
1368	Net deferred tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:NetDeferredTaxAssets
1369	Net deferred tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NetDeferredTaxLiabilities
1370	Deferred tax assets not recognised	Concept (Monetary)	As Of		ifrs-full:UnusedTaxCreditsForWhichNoDeferredTaxAssetRecognised
1371	Accumulated tax losses	Concept (Monetary)	As Of		ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
1372	Deferred tax assets for deductible temporary differences	Concept (Monetary)	As Of	Debit	ach:DeductibleTemporaryDifferencesTaxCreditsForWhichNoDeferredTaxAssetRecognised
1373	Deductible temporary differences	Concept (Monetary)	As Of	Debit	ach:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetRecognised
1374	41104 - Disclosure - DEFERRED TAX - Unprovided tax losses (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureDeferredTaxUnprovidedTaxLossesDetails
1375	Income Tax Disclosure [Table]	Table	*	*	ach:IncomeTaxDisclosureTable
1376	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1377	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1378	Within 1 year	Member			ifrs-full:NotLaterThanOneYearMember
1379	Past due for 1 to 2 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1380	2020	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1381	2021	Member			ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
1382	2022	Member			ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
1383	2023	Member			ach:LaterThanFiveYearsAndNotLaterThanSixYearsMember
1384	Income Tax Disclosure [line items]	LineItems			ach:IncomeTaxDisclosureLineItems
1385	Expiry profile of these unprovided tax losses	Abstract			ach:ExpiryProfileOfUnprovidedTaxLossesAbstract
1386	Unprovided tax losses	Concept (Monetary)	As Of		ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
1387	41201 - Disclosure - OTHER NON-CURRENT ASSETS (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherNonCurrentAssetsDetails
1388	Implied Table	Table	*	*	implied:Table
1389	OTHER NON-CURRENT ASSETS	Abstract			ach:OtherNonCurrentAssetsAbstract
1390	Financial assets	Abstract			ach:NonCurrentFinancialAssetsAbstract
1391	Other long-term receivables	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentTradeReceivables
1392	Prepayment for mining rights	Concept (Monetary)	As Of	Debit	ach:NonCurrentPrepaymentsForMiningRights
1393	Long-term prepaid expenses	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentPrepayments
1394	Deferred losses for sales and leaseback transactions	Concept (Monetary)	As Of	Debit	ach:NonCurrentDeferredLossesForSalesAndLeaseBackTransactions
1395	Others	Concept (Monetary)	As Of	Debit	ach:OtherNonCurrentAssetsOther
1396	Total non-financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentNonfinancialAssets
1397	Total other non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentAssets
1398	41301 - Disclosure - INVENTORIES (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInventoriesDetails
1399	Schedule Of Inventory Disclosure [Table]	Table	*	*	ach:ScheduleOfInventoryDisclosureTable
1400	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1401	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1402	Gross	Member			ifrs-full:GrossCarryingAmountMember
1403	Provision for impairment	Member			ifrs-full:AccumulatedImpairmentMember
1404	Inventories	LineItems			ach:ScheduleOfInventoryDisclosureLineItems
1405	Raw materials	Concept (Monetary)	As Of	Debit	ifrs-full:RawMaterials
1406	Work-in-progress	Concept (Monetary)	As Of	Debit	ifrs-full:WorkInProgress
1407	Finished goods	Concept (Monetary)	As Of	Debit	ifrs-full:FinishedGoods
1408	Spare parts	Concept (Monetary)	As Of	Debit	ifrs-full:SpareParts
1409	Packaging materials and others	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentPackagingAndStorageMaterials
1410	Total inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
1411	41302 - Disclosure - INVENTORIES - Movements in the provision for impairment of inventories (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInventoriesMovementsInProvisionForImpairmentOfInventoriesDetails
1412	Schedule Of Inventory Disclosure [Table]	Table	*	*	ach:ScheduleOfInventoryDisclosureTable
1413	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1414	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1415	Provision for impairment	Member			ifrs-full:AccumulatedImpairmentMember
1416	Inventories	LineItems			ach:ScheduleOfInventoryDisclosureLineItems
1417	Movements in the provision for impairment of inventories	Abstract			ifrs-full:WritedownsReversalsOfWritedownsOfInventoriesAbstract
1418	As at January 1,	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
1419	Provision for impairment of inventories	Concept (Monetary)	For Period		ach:ImpairmentLossRecognisedInProfitOrLossInventories
1420	Reversal arising from increase in net realisable value	Concept (Monetary)	For Period		ifrs-full:ReversalOfInventoryWritedown
1421	Written off upon sales of inventories	Concept (Monetary)	For Period	Debit	ifrs-full:WritedownsReversalsOfInventories
1422	Disposal of subsidiaries	Concept (Monetary)	For Period	Credit	ach:DecreaseThroughLossOfControlOfSubsidiaryInventories
1423	As at December 31,	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
1424	Inventories pledged for bank and other borrowings	Concept (Monetary)	As Of	Debit	ifrs-full:InventoriesPledgedAsSecurityForLiabilities
1425	41401 - Disclosure - TRADE AND NOTES RECEIVABLES (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureTradeAndNotesReceivablesDetails
1426	Trade and notes receivables [table]	Table	*	*	ach:TradeAndNotesReceivablesTable
1427	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1428	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1429	Gross	Member			ifrs-full:GrossCarryingAmountMember
1430	Provision for impairment	Member			ifrs-full:AccumulatedImpairmentMember
1431	Currency [Axis]	Axis			srt:CurrencyAxis
1432	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1433	USD	Member			currency:USD
1434	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1435	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1436	Bank and other borrowings	Member			ach:BankAndOtherBorrowingsMember
1437	Classes of financial instruments [axis]	Axis			ifrs-full:ClassesOfFinancialInstrumentsAxis
1438	Financial instruments, class [member]	Member			ifrs-full:ClassesOfFinancialInstrumentsMember
1439	Exchange notes receivable	Member			ach:ExchangeNotesReceivableMember
1440	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1441	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1442	Joint ventures	Member			ifrs-full:JointVenturesWhereEntityIsVenturerMember
1443	Associates	Member			ifrs-full:AssociatesMember
1444	Range [axis]	Axis			ifrs-full:RangeAxis
1445	Ranges [member]	Member			ifrs-full:RangesMember
1446	Minimum	Member			ifrs-full:BottomOfRangeMember
1447	Maximum	Member			ifrs-full:TopOfRangeMember
1448	TRADE AND NOTES RECEIVABLES	LineItems			ach:TradeAndNotesReceivablesLineItems
1449	Trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
1450	Notes receivable	Concept (Monetary)	As Of	Debit	ach:NotesReceivables
1451	Total trade and notes receivables	Concept (Monetary)	As Of	Debit	ach:TradeAndNotesReceivables
1452	Term of trade receivables	Concept (xbrli:durationItemType)	For Period		ach:TermOfTradeReceivables
1453	Pledged notes receivables	Concept (Monetary)	As Of	Debit	ach:NotesReceivablesPledgedAsSecurityForLiabilities
1454	Pledged trade receivables	Concept (Monetary)	As Of	Debit	ach:TradeReceivablesPledgedAsSecurityForLiabilities
1455	41402 - Disclosure - TRADE AND NOTES RECEIVABLES - Ageing analysis of trade and notes receivables (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureTradeAndNotesReceivablesAgeingAnalysisOfTradeAndNotesReceivablesDetails
1456	Ageing analysis of trade and notes receivables [table]	Table	*	*	ach:AgeingAnalysisOfTradeAndNotesReceivablesTable
1457	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1458	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1459	Gross	Member			ifrs-full:GrossCarryingAmountMember
1460	Provision for impairment	Member			ifrs-full:AccumulatedImpairmentMember
1461	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1462	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1463	Within 1 year	Member			ifrs-full:NotLaterThanOneYearMember
1464	Past due for 1 to 2 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1465	2020	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1466	Over 3 years	Member			ifrs-full:LaterThanThreeYearsMember
1467	TRADE AND NOTES RECEIVABLES	LineItems			ach:AgeingAnalysisOfTradeAndNotesReceivablesLineItems
1468	Trade and notes receivables	Concept (Monetary)	As Of	Debit	ach:TradeAndNotesReceivables
1469	41403 - Disclosure - TRADE AND NOTES RECEIVABLES - Credit risk exposure (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureTradeAndNotesReceivablesCreditRiskExposureDetails
1470	Ageing analysis of trade and notes receivables [table]	Table	*	*	ach:AgeingAnalysisOfTradeAndNotesReceivablesTable
1471	Segments [axis]	Axis			ifrs-full:SegmentsAxis
1472	Segments [member]	Member			ifrs-full:SegmentsMember
1473	Alumina and primary aluminum	Member			ach:AluminaAndPrimaryAluminumMember
1474	Energy	Member			ach:EnergySegmentMember
1475	Trading	Member			ach:TradingSegmentMember
1476	Corporate and other operating segments	Member			ach:CorporateAndOtherOperatingSegmentsMember
1477	Method of assessment of expected credit losses [axis]	Axis			ifrs-full:MethodOfAssessmentOfExpectedCreditLossesAxis
1478	Method of assessment of expected credit losses [member]	Member			ifrs-full:MethodOfAssessmentOfExpectedCreditLossesMember
1479	Stage 3	Member			ifrs-full:ExpectedCreditLossesIndividuallyAssessedMember
1480	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1481	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1482	Gross	Member			ifrs-full:GrossCarryingAmountMember
1483	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1484	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1485	Within 1 year	Member			ifrs-full:NotLaterThanOneYearMember
1486	Past due for 1 to 2 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1487	2020	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1488	Over 3 years	Member			ifrs-full:LaterThanThreeYearsMember
1489	TRADE AND NOTES RECEIVABLES	LineItems			ach:AgeingAnalysisOfTradeAndNotesReceivablesLineItems
1490	Trade and notes receivables	Concept (Monetary)	As Of	Debit	ach:TradeAndNotesReceivables
1491	Trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
1492	Exposure to credit risk on loan commitments and financial guarantee contracts	Concept (Monetary)	As Of	Credit	ifrs-full:ExposureToCreditRiskOnLoanCommitmentsAndFinancialGuaranteeContracts
1493	Expected credit loss rate	Concept (Percent)	As Of		ifrs-full:ExpectedCreditLossRate
1494	41404 - Disclosure - TRADE AND NOTES RECEIVABLES - Ageing analysis of trade receivables not individually nor collectively (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureTradeAndNotesReceivablesAgeingAnalysisOfTradeReceivablesNotIndividuallyNorCollectivelyDetails
1495	Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsTable
1496	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1497	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1498	Gross	Member			ifrs-full:GrossCarryingAmountMember
1499	Provision for impairment	Member			ifrs-full:AccumulatedImpairmentMember
1500	Past due status [axis]	Axis			ifrs-full:PastDueStatusAxis
1501	Past due status [member]	Member			ifrs-full:PastDueStatusMember
1502	Past due for 1 year	Member			ach:LessThanOneYearMember
1503	Past due for 1 to 2 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1504	Past due for over 2 years	Member			ach:LaterThanTwoYearsMember
1505	Impairment of financial assets [axis]	Axis			ifrs-full:ImpairmentOfFinancialAssetsAxis
1506	Entity's total for impairment of financial assets [member]	Member			ifrs-full:EntitysTotalForImpairmentOfFinancialAssetsMember
1507	Not past due	Member			ifrs-full:FinancialAssetsNeitherPastDueNorImpairedMember
1508	Individually impaired receivables	Member			ifrs-full:FinancialAssetsIndividuallyAssessedForCreditLossesMember
1509	Not individually nor collectively	Member			ach:FinancialAssetsNotIndividuallyNorCollectivelyMember
1510	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1511	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1512	Associates	Member			ifrs-full:AssociatesMember
1513	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1514	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1515	Within 1 year	Member			ifrs-full:NotLaterThanOneYearMember
1516	Past due for 1 to 2 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1517	2020	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1518	Over 3 years	Member			ifrs-full:LaterThanThreeYearsMember
1519	Ageing analysis of trade receivables were past due but not impaired	LineItems			ifrs-full:DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedLineItems
1520	Trade and notes receivables	Concept (Monetary)	As Of	Debit	ach:TradeAndNotesReceivables
1521	Trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeReceivables
1522	Pledged trade receivables	Concept (Monetary)	As Of	Debit	ach:TradeReceivablesPledgedAsSecurityForLiabilities
1523	Pledged notes receivables	Concept (Monetary)	As Of	Debit	ach:NotesReceivablesPledgedAsSecurityForLiabilities
1524	41405 - Disclosure - TRADE AND NOTES RECEIVABLES - Movements on the provision for impairment of trade receivables (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureTradeAndNotesReceivablesMovementsOnProvisionForImpairmentOfTradeReceivablesDetails
1525	Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsTable
1526	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1527	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1528	Provision for impairment	Member			ifrs-full:AccumulatedImpairmentMember
1529	Disclosure of financial assets that are either past due or impaired [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedLineItems
1530	Reconciliation of changes in other provisions	Abstract			ifrs-full:ReconciliationOfChangesInOtherProvisionsAbstract
1531	As at January 1,	Concept (Monetary)	As Of	Debit	ach:TradeAndNotesReceivablesGross
1532	Effect of adoption of IFRS 9	Concept (Monetary)	For Period	Credit	ach:EffectOfAdoptionOfIfrs9
1533	At beginning of year	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
1534	Provision for impairment	Concept (Monetary)	For Period		ach:ImpairmentLossRecognisedInProfitOrLossTradeAndNotesReceivables
1535	Written off	Concept (Monetary)	For Period	Debit	ach:WrittenOffTradeAndNotesReceivables
1536	Reversal	Concept (Monetary)	For Period	Debit	ach:ReversalOfTradeAndNotesReceivables
1537	Others (Note)	Concept (Monetary)	For Period	Debit	ach:IncreaseDecreaseThroughOtherChangesTradeAndNotesReceivables
1538	As at the December 31,	Concept (Monetary)	As Of	Debit	ach:TradeAndNotesReceivablesGross
1539	Carrying value of derecognized discounted notes receivable	Concept (Monetary)	As Of	Credit	ach:CarryingValueOfDerecognizedDiscountedNotesReceivable
1540	Carrying amount of not derecognized notes receivable accepted by banks in the PRC endorsed to certain of its suppliers in order to settle the trade payables due to suppliers	Concept (Monetary)	For Period	Debit	ach:CarryingAmountOfNotDerecognizedNotesReceivableAcceptedByBanksInPrcEndorsedToCertainOfItsSuppliersInOrderToSettleTradePayablesDueToSuppliers
1541	Gains or losses recognised from the continuing involvement	Concept (Monetary)	For Period	Credit	ach:GainLossOfRecognizedFinancialAssetsDuringYearOrCumulatively
1542	41501 - Disclosure - OTHER CURRENT ASSETS (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherCurrentAssetsDetails
1543	Disclosure of other current assets [table]	Table	*	*	ach:DisclosureOfOtherCurrentAssetsTable
1544	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1545	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1546	Other current assets	Member			ach:IfrsOtherCurrentAssetsMember
1547	Currency [Axis]	Axis			srt:CurrencyAxis
1548	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1549	USD	Member			currency:USD
1550	HKD	Member			currency:HKD
1551	RMB	Member			currency:CNY
1552	Disclosure of other current assets [line items]	LineItems			ach:DisclosureOfOtherCurrentAssetsLineItems
1553	Financial assets	Abstract			ifrs-full:DisclosureOfFinancialAssetsAbstract
1554	Deposits paid to suppliers	Concept (Monetary)	As Of	Debit	ach:CurrentDepositsToSuppliers
1555	Dividends receivable	Concept (Monetary)	As Of	Debit	ach:IfrsDividendsReceivable
1556	Receivables from other revenue	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentReceivables
1557	Entrusted loans and loans receivable from third parties	Concept (Monetary)	As Of	Debit	ach:EntrustedLoansAndLoansReceivableFromThirdParties
1558	Entrusted loans and loans receivable from related parties	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties
1559	Receivables from disposal of Guizhou Branch's aluminum properties	Concept (Monetary)	As Of	Debit	ach:ReceivablesFromDisposalOfAluminumPlantAndProperties
1560	Interest receivables	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentInterestReceivable
1561	Recoverable reimbursement for freight charges	Concept (Monetary)	As Of	Debit	ach:RecoverableReimbursementForFreightCharges
1562	Other financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentFinancialAssets
1563	Financial assets included in other current assets	Concept (Monetary)	As Of	Debit	ach:FinancialAssetsIncludedInOtherCurrentAssets
1564	Less: provision for impairment	Concept (Monetary)	As Of	Credit	ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1565	Financial assets included in other current assets, net of provision for impairment	Concept (Monetary)	As Of	Debit	ach:FinancialAssetsIncludedInOtherCurrentAssetsNetOfProvisionForImpairment
1566	Receivable of governments grants	Concept (Monetary)	As Of	Debit	ach:ReceivableOfGovernmentsGrantsCurrent
1567	Receivable of value-added tax refund	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentValueAddedTaxReceivables
1568	Advances to employees	Concept (Monetary)	As Of	Debit	ach:AdvancesToEmployees
1569	Deductible input value added tax receivables	Concept (Monetary)	As Of	Debit	ach:DeductibleInputValueAddedTaxReceivables
1570	Prepaid income tax	Concept (Monetary)	As Of	Debit	ach:PrepaidIncomeTax
1571	Prepayments to related parties for purchases	Concept (Monetary)	As Of	Debit	ach:PrepaymentsToRelatedPartiesForPurchases
1572	Prepayments to suppliers for purchases and others	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAdvancesToSuppliers
1573	Others	Concept (Monetary)	As Of	Debit	ifrs-full:OtherAssets
1574	Other current assets, excluded financial assets	Concept (Monetary)	As Of	Debit	ach:OtherCurrentAssetsExcludedFinancialAssets
1575	Less: provision for impairment	Concept (Monetary)	As Of	Credit	ach:ProvisionForImpairmentExcludedFinancialAssets
1576	Other current assets, excluded financial assets, net of provision for impairment	Concept (Monetary)	As Of	Debit	ach:OtherCurrentAssetsExcludedFinancialAssetsNetOfProvisionForImpairment
1577	Total other current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentAssets
1578	Other receivables	Concept (Monetary)	As Of	Debit	ifrs-full:OtherReceivables
1579	41502 - Disclosure - OTHER CURRENT ASSETS - Analysis of financial assets included in other current assets (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherCurrentAssetsAnalysisOfFinancialAssetsIncludedInOtherCurrentAssetsDetails
1580	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
1581	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1582	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1583	Within 1 year	Member			ifrs-full:NotLaterThanOneYearMember
1584	Past due for 1 to 2 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1585	2020	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1586	Over 3 years	Member			ifrs-full:LaterThanThreeYearsMember
1587	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1588	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1589	Other current assets	Member			ach:IfrsOtherCurrentAssetsMember
1590	Disclosure of financial assets [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsLineItems
1591	Financial assets included in other current assets	Concept (Monetary)	As Of	Debit	ach:FinancialAssetsIncludedInOtherCurrentAssets
1592	Less: provision for impairment	Concept (Monetary)	As Of	Credit	ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1593	Financial assets included in other current assets, net of provision for impairment	Concept (Monetary)	As Of	Debit	ach:FinancialAssetsIncludedInOtherCurrentAssetsNetOfProvisionForImpairment
1594	41503 - Disclosure - OTHER CURRENT ASSETS - Movements in the provision for impairment of other current assets (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherCurrentAssetsMovementsInProvisionForImpairmentOfOtherCurrentAssetsDetails
1595	Disclosure of other provisions [table]	Table	*	*	ifrs-full:DisclosureOfOtherProvisionsTable
1596	Classes of other provisions [axis]	Axis			ifrs-full:ClassesOfProvisionsAxis
1597	Other provisions [member]	Member			ifrs-full:OtherProvisionsMember
1598	Impairment on other current assets	Member			ach:ImpairmentOnOtherCurrentAssetsMember
1599	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1600	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1601	Other current assets	Member			ach:IfrsOtherCurrentAssetsMember
1602	Disclosure of other provisions [line items]	LineItems			ifrs-full:DisclosureOfOtherProvisionsLineItems
1603	Provision for impairment of other current assets	Abstract			ach:ProvisionForImpairmentOfOtherCurrentAssetsAbstract
1604	As at January 1,	Concept (Monetary)	As Of	Credit	ach:AllowanceAccountForCreditLosses
1605	Effect of adoption of IFRS 9	Concept (Monetary)	For Period	Credit	ach:EffectOfAdoptionOfIfrs9
1606	At beginning of year	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
1607	Provision for impairment	Concept (Monetary)	For Period		ach:AdditionalAllowanceRecognisedInProfitOrLossAllowanceAccountForCreditLosses
1608	Write off	Concept (Monetary)	For Period	Debit	ach:WriteOffAllowanceAccountForCreditLosses
1609	Reversal	Concept (Monetary)	For Period	Debit	ach:ReversalAllowanceAccountForCreditLosses
1610	Others	Concept (Monetary)	For Period	Credit	ach:IncreaseDecreaseThroughOtherChangesAllowanceAccountForCreditLosses
1611	As at December 31,	Concept (Monetary)	As Of	Credit	ach:AllowanceAccountForCreditLosses
1612	41504 - Disclosure - OTHER CURRENT ASSETS - Impairment under IFRS 9 (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherCurrentAssetsImpairmentUnderIfrs9Details
1613	Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsTable
1614	Impairment of financial assets [axis]	Axis			ifrs-full:ImpairmentOfFinancialAssetsAxis
1615	Entity's total for impairment of financial assets [member]	Member			ifrs-full:EntitysTotalForImpairmentOfFinancialAssetsMember
1616	Impaired financial assets	Member			ifrs-full:FinancialAssetsImpairedMember
1617	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1618	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1619	Within 1 year	Member			ifrs-full:NotLaterThanOneYearMember
1620	Past due for 1 to 2 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1621	2020	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1622	Over 3 years	Member			ifrs-full:LaterThanThreeYearsMember
1623	Type of measurement of expected credit losses [axis]	Axis			ifrs-full:TypeOfMeasurementOfExpectedCreditLossesAxis
1624	Type of measurement of expected credit losses [member]	Member			ifrs-full:TypeOfMeasurementOfExpectedCreditLossesMember
1625	12-month expected credit losses	Member			ifrs-full:TwelvemonthExpectedCreditLossesMember
1626	Lifetime expected credit losses	Member			ifrs-full:LifetimeExpectedCreditLossesMember
1627	Method of assessment of expected credit losses [axis]	Axis			ifrs-full:MethodOfAssessmentOfExpectedCreditLossesAxis
1628	Method of assessment of expected credit losses [member]	Member			ifrs-full:MethodOfAssessmentOfExpectedCreditLossesMember
1629	Stage 2	Member			ifrs-full:ExpectedCreditLossesCollectivelyAssessedMember
1630	Stage 3	Member			ifrs-full:ExpectedCreditLossesIndividuallyAssessedMember
1631	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1632	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1633	Gross	Member			ifrs-full:GrossCarryingAmountMember
1634	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1635	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1636	Other current assets	Member			ach:IfrsOtherCurrentAssetsMember
1637	Financial assets at amortized cost and stages for measurement of ECLs	LineItems			ifrs-full:DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsLineItems
1638	Exposure to credit risk on loan commitments and financial guarantee contracts	Concept (Monetary)	As Of	Credit	ifrs-full:ExposureToCreditRiskOnLoanCommitmentsAndFinancialGuaranteeContracts
1639	Other current assets, excluded financial assets	Concept (Monetary)	As Of	Debit	ach:OtherCurrentAssetsExcludedFinancialAssets
1640	Other current assets, excluded financial assets, net of provision for impairment	Concept (Monetary)	As Of	Debit	ach:OtherCurrentAssetsExcludedFinancialAssetsNetOfProvisionForImpairment
1641	41505 - Disclosure - OTHER CURRENT ASSETS - Impairment under IAS 39 (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherCurrentAssetsImpairmentUnderIas39Details
1642	Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsTable
1643	Classes of other provisions [axis]	Axis			ifrs-full:ClassesOfProvisionsAxis
1644	Other provisions [member]	Member			ifrs-full:OtherProvisionsMember
1645	Impairment on other current assets	Member			ach:ImpairmentOnOtherCurrentAssetsMember
1646	Past due status [axis]	Axis			ifrs-full:PastDueStatusAxis
1647	Past due status [member]	Member			ifrs-full:PastDueStatusMember
1648	Within 1 year	Member			ifrs-full:NotLaterThanOneYearMember
1649	Past due for 1 to 2 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1650	Past due for over 2 years	Member			ach:LaterThanTwoYearsMember
1651	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1652	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1653	Related parties	Member			ifrs-full:RelatedPartiesMember
1654	Impairment of financial assets [axis]	Axis			ifrs-full:ImpairmentOfFinancialAssetsAxis
1655	Entity's total for impairment of financial assets [member]	Member			ifrs-full:EntitysTotalForImpairmentOfFinancialAssetsMember
1656	Past due but not impaired	Member			ifrs-full:FinancialAssetsPastDueButNotImpairedMember
1657	Not past due	Member			ifrs-full:FinancialAssetsNeitherPastDueNorImpairedMember
1658	Not impaired	Member			ach:FinancialAssetsNotImpairedMember
1659	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1660	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1661	Other current assets	Member			ach:IfrsOtherCurrentAssetsMember
1662	Disclosure of financial assets that are either past due or impaired [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedLineItems
1663	Other current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentAssets
1664	Past due but not impaired financial assets due from the Group's related parties	Concept (Monetary)	As Of	Debit	ach:FinancialAssetsIncludedInOtherCurrentAssetsRelatedPartyTransactions
1665	41601 - Disclosure - CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AND TIME DEPOSITS (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureCashAndCashEquivalentsAndRestrictedCashAndTimeDepositsDetails
1666	Implied Table	Table	*	*	implied:Table
1667	CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AND TIME DEPOSITS	Abstract			ach:CashAndCashEquivalentsAndRestrictedCashAndCashEquivalentsAbstract
1668	Restricted cash	Concept (Monetary)	As Of	Debit	ifrs-full:RestrictedCashAndCashEquivalents
1669	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
1670	Total cash and cash equivalents, and cash and cash equivalents restricted	Concept (Monetary)	As Of	Debit	ach:CashAndCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
1671	41602 - Disclosure - CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AND TIME DEPOSITS - Bank balances and cash on hand of the group (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureCashAndCashEquivalentsAndRestrictedCashAndTimeDepositsBankBalancesAndCashOnHandOfGroupDetails
1672	Disclosure of bank balances and cash on hand of the group [table]	Table	*	*	ach:DisclosureOfBankBalancesAndCashOnHandOfGroupTable
1673	Currency [Axis]	Axis			srt:CurrencyAxis
1674	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1675	RMB	Member			currency:CNY
1676	USD	Member			currency:USD
1677	HKD	Member			currency:HKD
1678	EUR	Member			currency:EUR
1679	AUD	Member			currency:AUD
1680	IDR	Member			currency:IDR
1681	Bank balances and cash on hand of the group	LineItems			ach:DisclosureOfBankBalancesAndCashOnHandOfGroupLineItems
1682	Total cash and cash equivalents, and cash and cash equivalents restricted	Concept (Monetary)	As Of	Debit	ach:CashAndCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
1683	41701 - Disclosure - SHARE CAPITAL (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureShareCapitalDetails
1684	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
1685	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
1686	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
1687	Share capital	Member			ifrs-full:IssuedCapitalMember
1688	SHARE CAPITAL	LineItems			ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
1689	Balance at January 1 (in shares)	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
1690	Balance at December 31 (in shares)	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
1691	Number of ordinary shares, authorized	Concept (Shares)	As Of		ifrs-full:NumberOfSharesAuthorised
1692	Par value per share	Concept (Share)	As Of		ifrs-full:ParValuePerShare
1693	Equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1694	At December 31,	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
1695	Number of ordinary shares, issued	Concept (Shares)	As Of		ifrs-full:NumberOfSharesIssued
1696	Number of ordinary shares, outstanding	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
1697	41801 - Disclosure - RESERVES (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureReservesDetails
1698	RESERVES	Table	*	*	ifrs-full:DisclosureOfReservesWithinEquityTable
1699	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
1700	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
1701	Red Cliff Carbon Co., Ltd	Member			ach:RedCliffCarbonCoLtdMember
1702	Harbin Bingdong Light Logistics Co., Ltd	Member			ach:HarbinBingdongLightLogisticsCoLtdMember
1703	Target Companies	Member			ifrs-full:AggregatedIndividuallyImmaterialBusinessCombinationsMember
1704	RESERVES	LineItems			ifrs-full:DisclosureOfReservesWithinEquityLineItems
1705	Ownership interest	Concept (Percent)	As Of		ifrs-full:PercentageOfVotingEquityInterestsAcquired
1706	Decrease of share premium	Concept (Monetary)	For Period	Debit	ach:DecreaseOfSharePremium
1707	Number of investors who sold their shares	Concept (Integer)	For Period		ach:NumberOfSellingInvestors
1708	Consideration transferred	Concept (Monetary)	As Of	Credit	ifrs-full:CashTransferred
1709	Fair value of investment	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
1710	Carrying values of the Transferors' non-controlling interests derecognized, and were transferred to capital reserve	Concept (Monetary)	As Of	Debit	ifrs-full:GoodwillRecognisedAsOfAcquisitionDate
1711	Number of shares issued	Concept (Shares)	As Of		ifrs-full:NumberOfSharesIssued
1712	41901 - Disclosure - INTEREST BEARING LOANS AND BORROWINGS (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInterestBearingLoansAndBorrowingsDetails
1713	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1714	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1715	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1716	Bank and other loans	Member			ach:BankAndOtherLoansMember
1717	Secured	Member			ach:SecuredBankAndOtherLoansMember
1718	Guaranteed	Member			ach:GuaranteedBankAndOtherLoansMember
1719	Unsecured	Member			ach:UnsecuredBankAndOtherLoansMember
1720	Medium-term notes and bonds and long-term bonds	Member			ach:MediumTermNotesAndBondsAndLongTermBondsMember
1721	Medium-term notes and bonds and long-term bonds and private placement notes	Member			ach:MediumTermNotesAndBondsAndLongTermBondsAndPrivatePlacementsNotesMember
1722	Unsecured	Member			ach:UnsecuredMediumTermNotesAndBondsAndLongTermBondsAndPrivatePlacementsNotesMember
1723	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1724	Long-term loans and borrowings	Abstract			ach:LongTermLoansAndBorrowingsAbstract
1725	Finance lease payables	Concept (Monetary)	As Of	Credit	ifrs-full:FinanceLeaseLiabilities
1726	Long-term loans and borrowings	Concept (Monetary)	As Of	Credit	ach:LongTermBorrowingsCurrentAndNonCurrent
1727	Current portion of finance lease payables	Concept (Monetary)	As Of	Credit	ach:CurrentPortionOfNonCurrentFinanceLeaseLiabilities
1728	Current portion of medium-term bonds and long-term bonds	Concept (Monetary)	As Of	Credit	ach:CurrentPortionOfMediumTermBondsAndLongTermBondsIssued
1729	Current portion of long-term bank and other loans	Concept (Monetary)	As Of	Credit	ach:CurrentPortionOfLongTermBankLoansAndOtherLoansReceived
1730	Non-current portion of long-term loans and borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
1731	41902 - Disclosure - INTEREST BEARING LOANS AND BORROWINGS - Short-term loans and borrowings (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInterestBearingLoansAndBorrowingsShortTermLoansAndBorrowingsDetails
1732	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1733	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1734	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1735	Bank and other loans	Member			ach:BankAndOtherLoansMember
1736	Secured	Member			ach:SecuredBankAndOtherLoansMember
1737	Guaranteed	Member			ach:GuaranteedBankAndOtherLoansMember
1738	Unsecured	Member			ach:UnsecuredBankAndOtherLoansMember
1739	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1740	Short-term loans and borrowings	Abstract			ach:ShortTermLoansAndBorrowingsAbstract
1741	Short-term bonds, unsecured	Concept (Monetary)	As Of	Credit	ach:CurrentUnsecuredNotesAndBondsIssued
1742	Gold leasing arrangements	Concept (Monetary)	As Of	Credit	ach:CurrentGoldLeaseArrangements
1743	Current portion of finance lease payables	Concept (Monetary)	As Of	Credit	ach:CurrentPortionOfNonCurrentFinanceLeaseLiabilities
1744	Current portion of medium-term notes	Concept (Monetary)	As Of	Credit	ach:CurrentPortionOfMediumTermBondsAndLongTermBondsIssued
1745	Current portion of long-term bank and other loans	Concept (Monetary)	As Of	Credit	ach:CurrentPortionOfLongTermBankLoansAndOtherLoansReceived
1746	Short-term borrowings and current portion of long-term loans and borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings
1747	41903 - Disclosure - INTEREST BEARING LOANS AND BORROWINGS - Other information (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInterestBearingLoansAndBorrowingsOtherInformationDetails
1748	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1749	Currency [Axis]	Axis			srt:CurrencyAxis
1750	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1751	JPY	Member			currency:JPY
1752	USD	Member			currency:USD
1753	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1754	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1755	Joint ventures	Member			ifrs-full:JointVenturesWhereEntityIsVenturerMember
1756	Shandong Aluminum, Shanxi Aluminum Plant and China Great Wall Aluminum Corporation	Member			ach:SubsidiariesOfChinalcoMember
1757	OTHER EQUITY INSTRUMENTS	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1758	Loans and borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1759	41904 - Disclosure - INTEREST BEARING LOANS AND BORROWINGS - Maturity of long-term bank and other loans (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInterestBearingLoansAndBorrowingsMaturityOfLongTermBankAndOtherLoansDetails
1760	Disclosure of maturity analysis for non-derivative financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable
1761	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1762	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1763	Within 1 year	Member			ifrs-full:NotLaterThanOneYearMember
1764	Past due for 1 to 2 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1765	Between 2 and 5 years	Member			ach:LaterThanTwoAndNotLaterThanFiveYearsMember
1766	After 5 years	Member			ifrs-full:LaterThanFiveYearsMember
1767	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1768	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1769	Long-term bank and other loans, including current portion	Member			ach:LongTermBankAndOtherLoansMember
1770	Loans from banks and other financial institutions	Member			ach:LoansFromBanksAndOtherFinancialInstitutionsMember
1771	Other loans	Member			ach:OtherLoansMember
1772	Maturity of long-term bank and other loans	LineItems			ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems
1773	Loans from banks and other financial institutions	Concept (Monetary)	As Of	Credit	ach:NonCurrentBankLoansReceived
1774	Other loans	Concept (Monetary)	As Of	Credit	ach:NonCurrentLoansOther
1775	Total of long-term bank and other loans	Concept (Monetary)	As Of	Credit	ach:NonCurrentBankLoansAndOtherLoansReceived
1776	Weighted average annual interest rate on long-term bank and other loans	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
1777	41905 - Disclosure - INTEREST BEARING LOANS AND BORROWINGS - Medium-term and long-term notes and bonds and private placement notes (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInterestBearingLoansAndBorrowingsMediumTermAndLongTermNotesAndBondsAndPrivatePlacementNotesDetails
1778	Disclosure of information about non-current borrowings [table]	Table	*	*	ach:DisclosureOfInformationAboutNonCurrentBorrowingsTable
1779	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1780	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1781	Medium-term notes and bonds and long-term bonds	Member			ach:MediumTermNotesAndBondsAndLongTermBondsMember
1782	2015 medium-term 5.53% note	Member			ach:MediumTermNotes5.53PercentDueIn2018Member
1783	2015 medium-term 5.01% note	Member			ach:MediumTermNotes5.01PercentDueIn2018Member
1784	2013 medium-term 5.99% note	Member			ach:MediumTermBonds5.99PercentDueIn2018Member
1785	2015 medium-term 6.11% note	Member			ach:MediumTermBonds6.11PercentDueIn2018Member
1786	2015 medium-term 6.08% note	Member			ach:MediumTermBonds6.08PercentDueIn2018Member
1787	2016 private placement 5.12% note	Member			ach:PrivatePlacementsNotes5.12PercentDueIn2019Member
1788	2018 medium-term 5.84% note	Member			ach:MediumTermNotes5.84PercentDueIn2021Member
1789	2018 medium-term 4.66% bonds	Member			ach:MediumTermBonds4.66PercentDueIn2021Member
1790	2018 medium-term 5.06% bonds	Member			ach:MediumTermBonds5.06PercentDueIn2023Member
1791	2018 medium-term 4.30% bonds	Member			ach:MediumTermBonds4.30PercentDueIn2021Member
1792	2018 medium-term 4.57% bonds	Member			ach:MediumTermBonds4.57PercentDueIn2023Member
1793	2018 US dollar medium-term 5.25% bonds	Member			ach:MediumTermNotes5.25PercentDueIn2021Member
1794	Medium-term and long-term notes and bonds	LineItems			ach:DisclosureOfInformationAboutNonCurrentBorrowingsLineItems
1795	Face value	Concept (Monetary)	As Of		ifrs-full:NotionalAmount
1796	Interest rate (as a percent)	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
1797	Outstanding long-term and medium-term bonds	Concept (Monetary)	As Of	Credit	ach:LongTermBorrowingsCurrentAndNonCurrent
1798	41906 - Disclosure - INTEREST BEARING LOANS AND BORROWINGS - Short-term bank, other loans and short-term bonds (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInterestBearingLoansAndBorrowingsShortTermBankOtherLoansAndShortTermBondsDetails
1799	Disclosure of information about current borrowings [table]	Table	*	*	ach:DisclosureOfInformationAboutCurrentBorrowingsTable
1800	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1801	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1802	Short-term bank and other loans	Member			ach:ShortTermBankAndOtherLoansMember
1803	Short-term bonds	Member			ach:ShortTermBondsMember
1804	2017 short-term 4.30% bonds	Member			ach:ShortTermBonds4.30PercentDueIn2018Member
1805	2017 short-term 4.90% bonds	Member			ach:ShortTermBonds4.90PercentDueIn2018Member
1806	2018 Ningxia short-term 5.30% bonds	Member			ach:NingxiaShortTermBonds5.30PercentDueIn2019Member
1807	Short-term bonds	LineItems			ach:DisclosureOfInformationAboutCurrentBorrowingsLineItems
1808	Face value	Concept (Monetary)	As Of		ifrs-full:NotionalAmount
1809	Effective interest rate on short-term borrowings	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
1810	Outstanding short-term borrowings	Concept (Monetary)	As Of	Credit	ach:CurrentUnsecuredNotesAndBondsIssued
1811	41907 - Disclosure - INTEREST BEARING LOANS AND BORROWINGS - Guaranteed interest-bearing loans and borrowings (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInterestBearingLoansAndBorrowingsGuaranteedInterestBearingLoansAndBorrowingsDetails
1812	Disclosure of information about guaranteed interest-bearing borrowings [table]	Table	*	*	ach:DisclosureOfInformationAboutGuaranteedInterestBearingBorrowingsTable
1813	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
1814	Financial liabilities, class [member]	Member			ifrs-full:FinancialLiabilitiesMember
1815	Long-term loans	Member			ifrs-full:LongtermBorrowingsMember
1816	Short-term loans	Member			ifrs-full:ShorttermBorrowingsMember
1817	Guarantor by name [axis]	Axis			ach:GuarantorByNameAxis
1818	Guarantor by name [member]	Member			ach:GuarantorByNameMember
1819	Lanzhou Aluminum Factory	Member			ach:LanzhouAluminumFactoryMember
1820	Ningxia Energy	Member			ach:NingxiaEnergyMember
1821	Yinxing Energy	Member			ach:YinxingEnergyMember
1822	Baotou Aluminum Co. Ltd and Baotou Communications Investment Group Co. Ltd	Member			ach:BaotouAluminumCo.LtdAndBaotouCommunicationsInvestmentGroupCo.LtdMember
1823	The Company and Hangzhou Jinjiang Group Co. Ltd	Member			ach:ParentAndHangzhouJinjiangGroupCo.LtdMember
1824	Qingzhen Industrial Investment Co., Ltd.*("Qingzhen Investment")	Member			ach:QingzhenIndustrialInvestmentCo.LtdMember
1825	Guizhou Industrial Investment Group Co., Ltd.*("Guizhou Investment")	Member			ach:GuizhouIndustrialInvestmentGroupCo.LtdMember
1826	Chalco Shandong	Member			ach:ChalcoShandongCompanyLimitedMember
1827	China Great Wall Aluminum Co., Ltd	Member			ach:ChinaGreatWallAluminumCo.LtdMember
1828	Hangzhou Jinjiang, Qingzhen Investment and Guizhou Investment	Member			ach:HangzhouJinjiangQingzhenInvestmentAndGuizhouInvestmentMember
1829	Guaranteed interest-bearing loans and borrowings	LineItems			ach:DisclosureOfInformationAboutGuaranteedInterestBearingBorrowingsLineItems
1830	Guarantees received	Concept (Monetary)	As Of	Credit	ifrs-full:ExposureToCreditRiskOnLoanCommitmentsAndFinancialGuaranteeContracts
1831	41908 - Disclosure - INTEREST BEARING LOANS AND BORROWINGS - Gold leasing agreements (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureInterestBearingLoansAndBorrowingsGoldLeasingAgreementsDetails
1832	Disclosure of information about leasing agreements [table]	Table	*	*	ach:DisclosureOfInformationAboutLeasingAgreementTable
1833	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
1834	Financial liabilities, class [member]	Member			ifrs-full:FinancialLiabilitiesMember
1835	Short-term loans	Member			ifrs-full:ShorttermBorrowingsMember
1836	Types of interest rates [axis]	Axis			ifrs-full:TypesOfInterestRatesAxis
1837	Interest rate types [member]	Member			ifrs-full:InterestRateTypesMember
1838	Fixed interest rate	Member			ifrs-full:FixedInterestRateMember
1839	Range [axis]	Axis			ifrs-full:RangeAxis
1840	Ranges [member]	Member			ifrs-full:RangesMember
1841	Minimum	Member			ifrs-full:BottomOfRangeMember
1842	Maximum	Member			ifrs-full:TopOfRangeMember
1843	Counterparties [axis]	Axis			ifrs-full:CounterpartiesAxis
1844	Counterparties [member]	Member			ifrs-full:CounterpartiesMember
1845	The Banks	Member			ach:BankOfCommunicationsChinaEverbrightBankAndAgricultureBankOfChinaMember
1846	Gold leasing agreements	LineItems			ach:DisclosureOfInformationAboutLeasingAgreementsLineItems
1847	Lease agreement term	Concept (xbrli:durationItemType)	For Period		ach:TermOfLeaseAgreement
1848	Annual lease fee rates (as a percent)	Concept (Percent)	For Period		ach:LeaseLiabilitiesFeeRate
1849	Proceeds from a gold leasing arrangement	Concept (Monetary)	For Period	Debit	ach:ProceedFromGoldLeasingArrangementClassifiedAsFinancingActivities
1850	Interest rate (as a percent)	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
1851	42001 - Disclosure - FINANCE LEASE PAYABLES (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinanceLeasePayablesDetails
1852	Disclosure of finance lease and operating lease by lessee [table]	Table	*	*	ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
1853	Range [axis]	Axis			ifrs-full:RangeAxis
1854	Ranges [member]	Member			ifrs-full:RangesMember
1855	Minimum	Member			ifrs-full:BottomOfRangeMember
1856	Maximum	Member			ifrs-full:TopOfRangeMember
1857	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1858	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1859	Within 1 year	Member			ifrs-full:NotLaterThanOneYearMember
1860	Past due for 1 to 2 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1861	In the third to fifth years, inclusive	Member			ifrs-full:LaterThanThreeYearsAndNotLaterThanFiveYearsMember
1862	After 5 years	Member			ifrs-full:LaterThanFiveYearsMember
1863	FINANCE LEASE PAYABLES	LineItems			ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
1864	Lease term	Concept (xbrli:durationItemType)	For Period		ach:LesseeLeasingArrangementsFinanceLeasesTermOfContract
1865	Total minimum lease payments	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumFinanceLeasePaymentsPayable
1866	Future finance charges	Concept (Monetary)	As Of	Credit	ifrs-full:FutureFinanceChargeOnFinanceLease
1867	Total net finance lease payables	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumFinanceLeasePaymentsPayableAtPresentValue
1868	Portion classified as current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentFinanceLeaseLiabilities
1869	Long-term finance lease payables	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentFinanceLeaseLiabilities
1870	42002 - Disclosure - FINANCE LEASE PAYABLES - Sale and leaseback transactions with related parties (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinanceLeasePayablesSaleAndLeasebackTransactionsWithRelatedPartiesDetails
1871	Disclosure of finance lease and operating lease by lessee [table]	Table	*	*	ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
1872	Range [axis]	Axis			ifrs-full:RangeAxis
1873	Ranges [member]	Member			ifrs-full:RangesMember
1874	Minimum	Member			ifrs-full:BottomOfRangeMember
1875	Maximum	Member			ifrs-full:TopOfRangeMember
1876	FINANCE LEASE PAYABLES	LineItems			ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
1877	Sale and leaseback lease terms	Concept (xbrli:durationItemType)	For Period		ach:IfrsSaleLeasebackTransactionLeaseTerms
1878	Losses on sale and leaseback transactions	Concept (Monetary)	For Period	Debit	ach:LossesArisingFromSaleAndLeasebackTransactions
1879	Gain on sale and leaseback transactions	Concept (Monetary)	For Period	Credit	ach:GainsArisingFromSaleAndLeasebackTransactions
1880	Internal Rate of Return (IRR)	Concept (Percent)	For Period		ach:SaleAndLeasebackTransactionsInternalRateOfReturn
1881	42101 - Disclosure - OTHER NON-CURRENT LIABILITIES (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherNonCurrentLiabilitiesDetails
1882	Implied Table	Table	*	*	implied:Table
1883	OTHER NON-CURRENT LIABILITIES	Abstract			ach:OtherNonCurrentLiabilitiesAbstract
1884	Financial liabilities	Abstract			ifrs-full:CategoriesOfFinancialLiabilitiesAbstract
1885	Long-term payables for mining rights	Concept (Monetary)	As Of	Credit	ach:LongTermPayablesForMiningRights
1886	Other financial liabilities	Concept (Monetary)	As Of	Credit	ach:OtherFinancialLiabilitiesIncludedInOtherNonCurrentLiabilities
1887	Financial liabilities included in other non-current liabilities	Concept (Monetary)	As Of	Credit	ach:FinancialLiabilitiesIncludedInOtherNonCurrentLiabilities
1888	Obligations in relation to early retirement schemes	Concept (Monetary)	As Of	Credit	ach:NonCurrentObligationsInRelationToEarlyRetirementSchemes
1889	Deferred government grants	Concept (Monetary)	As Of	Credit	ach:NonCurrentDeferredGovernmentGrants
1890	Deferred gain relating to sales and lease back agreements	Concept (Monetary)	As Of	Credit	ach:DeferredGainFromSalesAndLeaseBack
1891	Contract liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentContractLiabilities
1892	Provision for rehabilitation	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts
1893	Others	Concept (Monetary)	As Of	Credit	ach:OtherNonCurrentLiabilitiesOther
1894	Other non current liabilities excluding financial liabilities	Concept (Monetary)	As Of	Credit	ach:OtherNonCurrentLiabilitiesExcludingFinancialLiabilities
1895	Other non current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNoncurrentLiabilities
1896	Maximum obligation period to pay the early retirement employees' living expenses	Concept (xbrli:durationItemType)	For Period		ach:MaximumObligationPeriodToPayEarlyRetirementEmployeesLivingExpenses
1897	Retirement benefits under the Group's early retirement schemes	Abstract			ach:RetirementBenefitChangeInBenefitObligationRollForward
1898	As at January 1,	Concept (Monetary)	As Of	Credit	ach:RetirementBenefitObligation
1899	Provision made during the year	Concept (Monetary)	For Period	Credit	ach:IncreaseDecreaseInProvisionForRetirementBenefitPlan
1900	Interest costs	Concept (Monetary)	For Period	Credit	ach:RetirementBenefitPlanInterestCost
1901	Payment during the year	Concept (Monetary)	For Period	Credit	ach:RetirementBenefitPlanObligationBenefitsPaid
1902	As at December 31,	Concept (Monetary)	As Of	Credit	ach:RetirementBenefitObligation
1903	Non-current	Concept (Monetary)	As Of	Credit	ach:NonCurrentRetirementBenefitPlanObligation
1904	Current	Concept (Monetary)	As Of	Credit	ach:CurrentRetirementBenefitPlanObligation
1905	42201 - Disclosure - OTHER PAYABLES AND ACCRUED LIABILITIES (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherPayablesAndAccruedLiabilitiesDetails
1906	Disclosure of financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfFinancialLiabilitiesTable
1907	Currency [Axis]	Axis			srt:CurrencyAxis
1908	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1909	USD	Member			currency:USD
1910	HKD	Member			currency:HKD
1911	Disclosure of financial liabilities	LineItems			ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
1912	Financial liabilities	Abstract			ifrs-full:CategoriesOfFinancialLiabilitiesAbstract
1913	Payable for capital expenditures	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentPayablesForPurchaseOfNoncurrentAssets
1914	Accrued interest	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentInterestPayable
1915	Payables withheld as guarantees and deposits	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentRetentionPayables
1916	Dividends payable by subsidiaries to non-controlling shareholders	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentDividendPayables
1917	Consideration payable for investment projects	Concept (Monetary)	As Of	Credit	ach:CurrentInvestmentProjectPayable
1918	Current portion of payables for mining rights	Concept (Monetary)	As Of	Credit	ach:CurrentPortionOfPayablesForMiningRights
1919	Others	Concept (Monetary)	As Of	Credit	ach:OtherFinancialLiabilitiesIncludedInAccrualsAndDeferredIncome
1920	Financial liabilities included in other payables and accrued liabilities	Concept (Monetary)	As Of	Credit	ach:FinancialLiabilitiesIncludedInAccrualsAndDeferredIncome
1921	Sales and other deposits from customers	Concept (Monetary)	As Of	Credit	ifrs-full:BalancesOnOtherDepositsFromCustomers
1922	Taxes other than income taxes payable	Concept (Monetary)	As Of	Credit	ifrs-full:PayablesOnSocialSecurityAndTaxesOtherThanIncomeTax
1923	Accrued payroll and bonus	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentProvisionsForEmployeeBenefits
1924	Staff welfare payables	Concept (Monetary)	As Of	Credit	ifrs-full:ShorttermEmployeeBenefitsAccruals
1925	Current portion of obligation in relation to early retirement schemes	Concept (Monetary)	As Of	Credit	ach:CurrentPortionOfObligationInRelationToEarlyRetirementSchemes
1926	Contribution payable for pension insurance	Concept (Monetary)	As Of	Credit	ach:ContributionPayableForPensionInsurance
1927	Output value added tax on pending	Concept (Monetary)	As Of	Credit	ach:OutputValueAddedTaxOnPending
1928	Others	Concept (Monetary)	As Of	Credit	ach:OtherPayablesExcludedFinancialLiabilities
1929	Other payables and accrued liabilities, excluded financial liabilities	Concept (Monetary)	As Of	Credit	ach:AccrualsAndDeferredIncomeExcludedFinancialLiabilitiesClassifiedAsCurrent
1930	Total accruals and deferred income classified as current	Concept (Monetary)	As Of	Credit	ifrs-full:AccrualsAndDeferredIncomeClassifiedAsCurrent
1931	42301 - Disclosure - TRADE AND NOTES PAYABLES (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureTradeAndNotesPayablesDetails
1932	Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [table]	Table	*	*	ifrs-full:DisclosureOfAmountsToBeRecoveredOrSettledAfterTwelveMonthsForClassesOfAssetsAndLiabilitiesThatContainAmountsToBeRecoveredOrSettledBothNoMoreAndMoreThanTwelveMonthsAfterReportingDateTable
1933	Currency [Axis]	Axis			srt:CurrencyAxis
1934	All Currencies [Domain]	Member			currency:AllCurrenciesDomain
1935	USD	Member			currency:USD
1936	TRADE AND NOTES PAYABLES	LineItems			ifrs-full:DisclosureOfAmountsToBeRecoveredOrSettledAfterTwelveMonthsForClassesOfAssetsAndLiabilitiesThatContainAmountsToBeRecoveredOrSettledBothNoMoreAndMoreThanTwelveMonthsAfterReportingDateLineItems
1937	Trade payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
1938	Notes payable	Concept (Monetary)	As Of	Credit	ach:CurrentNotesPayable
1939	Total trade and notes payables	Concept (Monetary)	As Of	Credit	ach:TradeAndCurrentNotesPayables
1940	42302 - Disclosure - TRADE AND NOTES PAYABLE - AGEING ANALYSIS (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureTradeAndNotesPayableAgeingAnalysisDetails
1941	Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [table]	Table	*	*	ifrs-full:DisclosureOfAmountsToBeRecoveredOrSettledAfterTwelveMonthsForClassesOfAssetsAndLiabilitiesThatContainAmountsToBeRecoveredOrSettledBothNoMoreAndMoreThanTwelveMonthsAfterReportingDateTable
1942	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1943	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1944	Within 1 year	Member			ifrs-full:NotLaterThanOneYearMember
1945	Past due for 1 to 2 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
1946	2020	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1947	Over 3 years	Member			ifrs-full:LaterThanThreeYearsMember
1948	TRADE AND NOTES PAYABLES	LineItems			us-gaap:StatementLineItems
1949	Trade and notes payables	Concept (Monetary)	As Of	Credit	ach:TradeAndCurrentNotesPayables
1950	42401 - Disclosure - PLEDGE OF ASSETS (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosurePledgeOfAssetsDetails
1951	Disclosure of pledge of assets [Table]	Table	*	*	ach:DisclosureOfPledgeOfAssetsTable
1952	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1953	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1954	Ningxia Energy	Member			ach:ChinaAluminumNingxiaEnergyGroupCompanyLimitedMember
1955	Disclosure of pledge of assets [Line Items]	LineItems			ach:DisclosureOfPledgeOfAssetsLineItems
1956	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentPledgedAsSecurity
1957	Land use rights	Concept (Monetary)	As Of	Debit	ach:LandUseRightsPledgedAsSecurity
1958	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsPledgedAsSecurityForLiabilities
1959	Notes receivable	Concept (Monetary)	As Of	Debit	ach:NotesReceivablesPledgedAsSecurity
1960	Trade receivables	Concept (Monetary)	As Of	Debit	ach:TradeReceivablesPledgedAsSecurity
1961	Investment in an associate	Concept (Monetary)	As Of	Debit	ach:InvestmentsAccountedForUsingEquityMethodPledgedAsSecurityForLiabilities
1962	Assets pledged as security	Concept (Monetary)	As Of	Debit	ach:AssetsPledgedAsSecurity
1963	Current portion of long-term loans and borrowings secured by contractual right to charge users for electricity generated in the future	Concept (Monetary)	As Of	Debit	ach:ContractualRightToChargeUsersForElectricityGeneratedInFuturePledgedAsSecurityForCurrentPortionOfLongTermLoans
1964	Non-current portion of long-term loans and borrowings secured by contractual right to charge users for electricity generated in the future	Concept (Monetary)	As Of	Debit	ach:ContractualRightToChargeUsersForElectricityGeneratedInFuturePledgedAsSecurityForNonCurrentPortionOfLongTermLoans
1965	Ownership interest in associate (in percent)	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInAssociate
1966	Percentage of equity attributable to the Company	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInSubsidiary
1967	42501 - Disclosure - PROFIT BEFORE INCOME TAX (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureProfitBeforeIncomeTaxDetails
1968	Implied Table	Table	*	*	implied:Table
1969	PROFIT BEFORE INCOME TAX	Abstract			ifrs-full:ProfitLossAbstract
1970	Purchase of inventories in relation to trading activities	Concept (Monetary)	For Period	Debit	ifrs-full:ChangesInInventoriesOfFinishedGoodsAndWorkInProgress
1971	Raw materials and consumables used, and changes in work-in-progress and finished goods	Concept (Monetary)	For Period	Debit	ach:RawMaterialsAndConsumablesUsedAndChangesInWorkInProgressAndFinishedGoods
1972	Power and utilities	Concept (Monetary)	For Period	Debit	ifrs-full:UtilitiesExpense
1973	Depreciation and amortization	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationAndAmortisationExpense
1974	Employee benefit expenses	Concept (Monetary)	For Period	Debit	ifrs-full:EmployeeBenefitsExpense
1975	Repairs and maintenance	Concept (Monetary)	For Period	Debit	ifrs-full:RepairsAndMaintenanceExpense
1976	Transportation expenses	Concept (Monetary)	For Period	Debit	ifrs-full:TransportationExpense
1977	Logistic cost	Concept (Monetary)	For Period	Debit	ach:LogisticExpense
1978	Taxes other than income tax expense	Concept (Monetary)	For Period	Debit	ifrs-full:TaxExpenseOtherThanIncomeTaxExpense
1979	Rental expenses for land use rights and buildings	Concept (Monetary)	For Period	Debit	ifrs-full:RentalExpense
1980	Packaging expenses	Concept (Monetary)	For Period	Debit	ach:PackagingExpense
1981	Research and development expenses	Concept (Monetary)	For Period	Debit	ifrs-full:ResearchAndDevelopmentExpense
1982	Auditors' remuneration expense	Concept (Monetary)	For Period	Debit	ifrs-full:AuditorsRemuneration
1983	Auditors' remuneration for audit and non audit services	Concept (Monetary)	For Period	Debit	ach:AuditorSRemunerationForAuditAndNonAuditServices
1984	42601 - Disclosure - OTHER INCOME (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherIncomeDetails
1985	Implied Table	Table	*	*	implied:Table
1986	OTHER INCOME	Abstract			ach:DisclosureOfOtherIncomeAbstract
1987	Income from government grants	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromGovernmentGrants
1988	42701 - Disclosure - OTHER GAINS, NET (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherGainsNetDetails
1989	Implied Table	Table	*	*	implied:Table
1990	OTHER GAINS, NET	Abstract			ach:DisclosureOfOtherGainLossesAbstract
1991	Gain on deemed disposal and disposal of subsidiaries	Concept (Monetary)	For Period	Credit	ach:GainOnDeemedDisposalAndDisposalOfSubsidiaries
1992	Gain on disposal and dividends of available for sales investments/equity investments designated at fair value through other comprehensive income	Concept (Monetary)	For Period	Credit	ach:GainOnDisposalAndDividendsOfEquityInvestmentsAtFairValueThroughOtherComprehensiveIncome
1993	Realized gains/(losses) on futures, forward and option contracts, net	Concept (Monetary)	For Period	Credit	ach:RealisedGainLossOnFuturesForwardAndOptionContractsNet
1994	Unrealized gains/(losses) on futures, forward and option contracts, net	Concept (Monetary)	For Period	Credit	ach:UnrealizedGainsLossesOnFuturesForwardAndOptionContractsNet
1995	Gain on disposal of other property, plant and equipment and land use rights, net	Concept (Monetary)	For Period	Credit	ach:GainsLossesOnDisposalsOfPropertyPlantAndEquipmentAndLandUseRightsNet
1996	Gain on previously held equity interest remeasured at acquisition-date fair value	Concept (Monetary)	For Period	Credit	ifrs-full:GainLossRecognisedAsResultOfRemeasuringToFairValueEquityInterestInAcquireeHeldByAcquirerBeforeBusinessCombination
1997	Loss on disposal of investments in associates	Concept (Monetary)	For Period	Debit	ach:LossOnDisposalOfInvestmentsInAssociates
1998	Others	Concept (Monetary)	For Period	Credit	ach:OtherGainsLossesOther
1999	Other gains, net	Concept (Monetary)	For Period	Credit	ifrs-full:OtherGainsLosses
2000	42801 - Disclosure - FINANCE INCOME/FINANCE COSTS (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinanceIncomeFinanceCostsDetails
2001	FINANCE INCOME/FINANCE COSTS [table]	Table	*	*	ach:FinanceIncomeFinanceCostsTable
2002	Range [axis]	Axis			ifrs-full:RangeAxis
2003	Ranges [member]	Member			ifrs-full:RangesMember
2004	Minimum	Member			ifrs-full:BottomOfRangeMember
2005	Maximum	Member			ifrs-full:TopOfRangeMember
2006	FINANCE INCOME/FINANCE COSTS	LineItems			ach:FinanceIncomeFinanceCostsLineItems
2007	Finance income - interest income	Concept (Monetary)	For Period	Credit	ifrs-full:FinanceIncome
2008	Interest expense	Concept (Monetary)	For Period		ifrs-full:InterestCostsIncurred
2009	Less: interest expense capitalized in property, plant and equipment	Concept (Monetary)	For Period		ifrs-full:InterestCostsCapitalised
2010	Interest expense, net of capitalized interest	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpense
2011	Amortization of unrecognized finance expenses	Concept (Monetary)	For Period	Debit	ifrs-full:AmortisationExpense
2012	Exchange (gain)/loss, net	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
2013	Finance costs	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
2014	Capitalization rate during the year	Concept (Percent)	For Period		ifrs-full:CapitalisationRateOfBorrowingCostsEligibleForCapitalisation
2015	42901 - Disclosure - EMPLOYEE BENEFIT EXPENSES (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureEmployeeBenefitExpensesDetails
2016	Implied Table	Table	*	*	implied:Table
2017	EMPLOYEE BENEFIT EXPENSES	Abstract			ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
2018	Salaries and bonus	Concept (Monetary)	For Period	Debit	ifrs-full:WagesAndSalaries
2019	Housing fund	Concept (Monetary)	For Period	Debit	ach:HousingFund
2020	Staff welfare and other expenses	Concept (Monetary)	For Period	Debit	ifrs-full:OtherEmployeeExpense
2021	Employment expense in relation to early retirement schemes	Concept (Monetary)	For Period	Debit	ach:RetirementBenefitPlanExpense
2022	Employment expenses in relation to termination benefit	Concept (Monetary)	For Period	Debit	ifrs-full:TerminationBenefitsExpense
2023	Total employee benefits expense	Concept (Monetary)	For Period	Debit	ifrs-full:EmployeeBenefitsExpense
2024	43001 - Disclosure - DIRECTORS' AND SUPERVISORS' REMUNERATION - Remuneration payables to directors and supervisors (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureDirectorsAndSupervisorsRemunerationRemunerationPayablesToDirectorsAndSupervisorsDetails
2025	Implied Table	Table	*	*	implied:Table
2026	DIRECTORS' AND SUPERVISORS' REMUNERATION	Abstract			ach:DisclosureOfInformationAboutKeyManagementPersonnelAbstract
2027	Fees	Concept (Monetary)	For Period	Debit	ach:KeyManagementPersonnelCompensationFees
2028	Basic salaries, housing fund, other allowances and benefits in kind	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
2029	Pension costs	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits
2030	Total remuneration	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensation
2031	43002 - Disclosure - DIRECTORS' AND SUPERVISORS' REMUNERATION - Remuneration of each director and supervisor (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureDirectorsAndSupervisorsRemunerationRemunerationOfEachDirectorAndSupervisorDetails
2032	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2033	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2034	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2035	Executive Directors	Member			ach:ExecutiveDirectorsMember
2036	Jiang Yinggang	Member			ach:JiangYinggangMember
2037	Zhu Runzhou	Member			ach:ZhuRunzhouMember
2038	Non-executive Directors	Member			ach:NonExecutiveDirectorsMember
2039	Wang Jun	Member			ach:WangJunDirectorsMember
2040	Lie-A-Cheong Tai-Chong, David	Member			ach:LieCheongTaiChongDavidMember
2041	Chen Lijie	Member			ach:ChenLijieMember
2042	Hu Shihai	Member			ach:HuShihaiMember
2043	Supervisors	Member			ach:SupervisorsMember
2044	Wu Zuoming	Member			ach:WuZuomingMember
2045	Significant related party transactions	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2046	Fees	Concept (Monetary)	For Period	Debit	ach:KeyManagementPersonnelCompensationFees
2047	Salaries	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
2048	Pension costs	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits
2049	Total	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensation
2050	43003 - Disclosure - DIRECTORS' AND SUPERVISORS' REMUNERATION - Remuneration of the directors and supervisors of the Company fell within following band (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureDirectorsAndSupervisorsRemunerationRemunerationOfDirectorsAndSupervisorsOfCompanyFellWithinFollowingBandDetails
2051	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2052	Range [axis]	Axis			ifrs-full:RangeAxis
2053	Ranges [member]	Member			ifrs-full:RangesMember
2054	Minimum	Member			ifrs-full:BottomOfRangeMember
2055	Maximum	Member			ifrs-full:TopOfRangeMember
2056	Directors' and supervisors' remuneration	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2057	Key management personnel compensation	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensation
2058	Number of directors and supervisors whose remuneration fell within Nil to RMB1,000,000	Concept (Integer)	For Period		ach:NumberOfKeyManagementPersonnelsCompensationWithinSpecifiedRange
2059	Options granted to directors or supervisors of the Company	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
2060	Emoluments paid to directors or supervisors	Concept (Monetary)	For Period	Debit	ach:KeyManagementPersonnelEmoluments
2061	Number of highest paid employees included in the emoluments paid to directors or supervisors	Concept (Integer)	For Period		ach:EmolumentsPaidToKeyManagementPersonnelNumberOfHighestPaidEmployees
2062	43004 - Disclosure - DIRECTORS' AND SUPERVISORS' REMUNERATION - Five highest paid individuals (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureDirectorsAndSupervisorsRemunerationFiveHighestPaidIndividualsDetails
2063	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2064	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2065	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2066	Highest paid employees other than directors and supervisors	Member			ach:HighestPaidEmployeesOtherThanDirectorsAndSupervisorsMember
2067	Significant related party transactions	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2068	Emoluments paid to key management personnel, number of highest paid employees	Concept (Integer)	For Period		ach:EmolumentsPaidToKeyManagementPersonnelNumberOfHighestPaidEmployees
2069	Number of directors among five highest paid employees	Concept (Integer)	For Period		ach:NumberOfDirectorsAmongFiveHighestPaidEmployees
2070	Number of supervisors among five highest paid employees	Concept (Integer)	For Period		ach:NumberOfSupervisorsAmongFiveHighestPaidEmployees
2071	Basic salaries, housing fund, other allowances and benefits in kind	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
2072	Pension costs	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits
2073	Total remuneration	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensation
2074	43005 - Disclosure - DIRECTORS' AND SUPERVISORS' REMUNERATION - Five highest paid individuals, Others (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureDirectorsAndSupervisorsRemunerationFiveHighestPaidIndividualsOthersDetails
2075	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2076	Range [axis]	Axis			ifrs-full:RangeAxis
2077	Ranges [member]	Member			ifrs-full:RangesMember
2078	Minimum	Member			ifrs-full:BottomOfRangeMember
2079	Maximum	Member			ifrs-full:TopOfRangeMember
2080	Significant related party transactions	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2081	Number of remaining highest paid individuals other than director and supervisor	Concept (Integer)	For Period		ach:NumberOfRemainingHighestPaidIndividualsOtherThanDirectorAndSupervisor
2082	Remuneration amount for remaining two highest paid individuals	Concept (Monetary)	For Period	Debit	ach:HighestPaidKeyManagementPersonnelCompensationOtherThanDirectorAndSupervisor
2083	43101 - Disclosure - INCOME TAX BENEFIT/(EXPENSE) - (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureIncomeTaxBenefitExpenseDetails
2084	Implied Table	Table	*	*	implied:Table
2085	INCOME TAX BENEFIT/(EXPENSE)	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
2086	PRC corporate income tax	Concept (Monetary)	For Period	Debit	ifrs-full:CurrentTaxExpenseIncome
2087	Deferred tax (benefit)/expense	Concept (Monetary)	For Period	Debit	ifrs-full:DeferredTaxExpenseIncome
2088	Income tax (expense)/benefit	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
2089	Corporate income tax rate	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
2090	Tax concessions including a preferred tax rate	Concept (Percent)	For Period		ach:PreferredTaxRate
2091	43102 - Disclosure - INCOME TAX BENEFIT/(EXPENSE) - Reconciliation of tax (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureIncomeTaxBenefitExpenseReconciliationOfTaxDetails
2092	Income Tax Disclosure [Table]	Table	*	*	ach:IncomeTaxDisclosureTable
2093	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2094	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2095	Associates	Member			ifrs-full:AssociatesMember
2096	Joint ventures	Member			ifrs-full:JointVenturesWhereEntityIsVenturerMember
2097	INCOME TAX BENEFIT/(EXPENSE)	LineItems			ach:IncomeTaxDisclosureLineItems
2098	Reconciliation of income tax expense (benefit)	Abstract			ifrs-full:ReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesAbstract
2099	Profit before income tax	Concept (Monetary)	For Period	Credit	ifrs-full:AccountingProfit
2100	Tax expense calculated at the statutory tax rate of 25% (2017: 25%)	Concept (Monetary)	For Period	Debit	ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
2101	Preferential income tax rates applicable to certain branches and subsidiaries	Concept (Monetary)	For Period	Debit	ach:TaxEffectOfPreferentialIncomeTax
2102	Impact of change in income tax rate	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectFromChangeInTaxRate
2103	Tax losses with no deferred tax assets recognized	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectOfTaxLosses
2104	Deductible temporary differences with no deferred tax assets recognized	Concept (Monetary)	For Period	Debit	ach:TaxEffectOfDeductibleTemporaryDifferencesWithNoDeferredTaxAssetRecognized
2105	Utilisation of previously unrecognized tax losses and deductible temporary differences	Concept (Monetary)	For Period	Credit	ifrs-full:TaxBenefitArisingFromPreviouslyUnrecognisedTaxLossTaxCreditOrTemporaryDifferenceOfPriorPeriodUsedToReduceDeferredTaxExpense
2106	Tax incentive in relation to deduction of certain expenses	Concept (Monetary)	For Period	Credit	ach:TaxEffectFromTaxIncentive
2107	Non-taxable income	Concept (Monetary)	For Period	Credit	ifrs-full:TaxEffectOfRevenuesExemptFromTaxation2011
2108	Expenses not deductible for tax purposes	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
2109	Write-off of unrecoverable deferred tax assets previously recognized	Concept (Monetary)	For Period	Debit	ach:TaxEffectOfWriteOffOfUnrecoverableDeferredTaxAssetsPreviouslyRecognized
2110	Return on equity investment measured by the equity method	Concept (Monetary)	For Period	Credit	ach:EquityMethodInvestmentNetIncomeLoss
2111	Recognition of deferred tax assets related to deductible temporary differences and tax losses previously not recognized	Concept (Monetary)	For Period	Credit	ach:TaxEffectOfRecognitionOfDeferredTaxAssetsPreviouslyUnrecognizedDeductibleTemporaryDifferencesAndTaxLosses
2112	True-up adjustments in respect of prior year's annual income tax filings and others	Concept (Monetary)	For Period	Debit	ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
2113	Income tax expense	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
2114	Effective tax rate	Concept (Percent)	For Period		ifrs-full:AverageEffectiveTaxRate
2115	Applicable tax rate	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
2116	43201 - Disclosure - EARNINGS PER SHARE ATTRIBUTABLE TO ORDINARY EQUITY HOLDERS OF THE PARENT (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureEarningsPerShareAttributableToOrdinaryEquityHoldersOfParentDetails
2117	Implied Table	Table	*	*	implied:Table
2118	EARNINGS PER SHARE ATTRIBUTABLE TO ORDINARY EQUITY HOLDERS OF THE PARENT	Abstract			ifrs-full:EarningsPerShareAbstract
2119	Profit attributable to ordinary equity holders of the parent (RMB)	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity
2120	Other equity instruments' distribution reserved (RMB)	Concept (Monetary)	For Period	Debit	ach:OtherEquityInstrumentsDistributionAdjustmentsToProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity
2121	Profit attributable to ordinary equity holders of the parent after adjusting other equity instruments' distribution reserved	Concept (Monetary)	For Period	Credit	ach:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityAfterAdjustingOtherEquityInstrumentsDistribution
2122	Weighted average number of ordinary shares in issue	Concept (Shares)	For Period		ifrs-full:WeightedAverageShares
2123	Effect of equity exchange arrangement (Note 18(b))	Concept (Shares)	For Period		ach:EffectOfEquityExchangeArrangementOnNumberOfOrdinaryShares
2124	Weighted average number of ordinary shares in issue after adjusting the effect of equity exchange arrangement	Concept (Shares)	For Period		ifrs-full:AdjustedWeightedAverageShares
2125	Basic earnings per share (RMB)	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
2126	Dilutive potential shares	Concept (Shares)	For Period		ach:IfrsAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
2127	43401 - Disclosure - NOTES TO THE CONSOLIDATED STATEMENT OF CASH FLOWS - Supplemental disclosures (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureNotesToConsolidatedStatementOfCashFlowsSupplementalDisclosuresDetails
2128	Implied Table	Table	*	*	implied:Table
2129	NOTES TO THE CONSOLIDATED STATEMENT OF CASH FLOWS	Abstract			ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
2130	Profit before income tax	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
2131	Adjustments for:	Abstract			ifrs-full:AdjustmentsForReconcileProfitLossAbstract
2132	Share of profits and losses of joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod
2133	Share of profits and losses of associates	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
2134	Depreciation of property, plant and equipment	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDepreciationExpense
2135	Depreciation of investment properties	Concept (Monetary)	For Period		ifrs-full:DepreciationInvestmentProperty
2136	Gain on disposal of other property, plant and equipment and land use rights, net	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets
2137	Gain on disposal of Environmental Protection Assets	Concept (Monetary)	For Period	Credit	ifrs-full:GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation
2138	Impairment losses on property, plant and equipment	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
2139	Impairment losses of intangible assets	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill
2140	Amortization of intangible assets	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForAmortisationExpense
2141	Amortization of land use rights	Concept (Monetary)	For Period	Debit	ach:AdjustmentsForAmortisationOfLandUseRights
2142	Amortization of prepaid expenses included in other non-current assets	Concept (Monetary)	For Period	Debit	ach:AdjustmentsForAmortisationOfPrepaidExpensesIncludedInOtherNonCurrentAssets
2143	Realized and unrealized losses/(gains) on futures, option and forward contracts	Concept (Monetary)	For Period	Credit	ach:RealizedAndUnrealizedGainLossOnFuturesOptionsAndForwardContracts
2144	Gain on previously held equity interest remeasured at acquisition-date fair value	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForFairValueGainsLosses
2145	Gain on disposals and deemed disposals of subsidiaries	Concept (Monetary)	For Period	Credit	ach:AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiaries
2146	Loss on disposal of investments in associates	Concept (Monetary)	For Period	Credit	ach:AdjustmentsForGainLossOnDisposalOfInvestmentsInAssociates
2147	Gain on disposal of and dividends from equity investments	Concept (Monetary)	For Period	Credit	ach:GainOnDisposalAndDividendsFromEquityInvestments
2148	Receipt of government subsidies	Concept (Monetary)	For Period	Credit	ach:ReceiptOfGovernmentSubsidies
2149	Interest income	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForInterestIncome
2150	Finance costs	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForFinanceCosts
2151	Change in special reserve	Concept (Monetary)	For Period	Debit	ach:AdjustmentsForIncreaseDecreaseInSpecialReserve
2152	Others	Concept (Monetary)	For Period	Debit	ifrs-full:OtherAdjustmentsToReconcileProfitLoss
2153	Cash flows generated from operating activities before working capital changes	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital
2154	Changes in working capital:	Abstract			ach:AdjustmentsToReconcileProfitLossUnderChangesInWorkingCapitalAbstract
2155	Decrease/(increase) in inventories	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
2156	Increase in trade and notes receivables	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
2157	Decrease in other current assets	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInOtherCurrentAssets
2158	(Increase)/decrease in restricted cash	Concept (Monetary)	For Period	Debit	ach:AdjustmentsForDecreaseIncreaseInRestrictedCash
2159	(Increase)/decrease in other non-current assets	Concept (Monetary)	For Period	Debit	ach:AdjustmentsForDecreaseIncreaseInOtherNonCurrentAssets
2160	(Decrease)/increase in trade and notes payables	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables
2161	(Increase/(decrease) in other payables and accrued liabilities	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInOtherOperatingPayables
2162	Increase in other non-current liabilities	Concept (Monetary)	For Period	Debit	ach:AdjustmentsForIncreaseDecreaseInOtherNonCurrentLiabilities
2163	Cash generated from operations	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperations
2164	PRC corporate income taxes paid	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities
2165	Net cash generated from operating activities	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperatingActivities
2166	Non-cash transactions of investing activities and financing activities	Abstract			ach:Ifrscashflownoninvestingandfinancingactivitiesdisclosureabstract
2167	Capital injection to an associate and joint ventures by non-cash assets	Concept (Monetary)	For Period	Credit	ach:NoncashCapitalContributionToEquityMethodInvestments
2168	Equity exchange arrangement	Concept (Monetary)	For Period	Credit	ach:NoncashEquityExchangeArrangement
2169	Endorsement of notes receivables accepted from sale of goods or services for purchase of property, plant and equipment	Concept (Monetary)	As Of	Debit	ach:NotesReceivableEndorsed
2170	Acquisition of businesses at non-cash consideration	Concept (Monetary)	For Period	Debit	ach:NoncashAcquisitionBusinessInterestAcquired
2171	Finance lease	Concept (Monetary)	For Period	Debit	ach:FinanceLeaseObligationIncurred
2172	43402 - Disclosure - NOTES TO THE CONSOLIDATED STATEMENT OF CASH FLOWS - Financing activities (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureNotesToConsolidatedStatementOfCashFlowsFinancingActivitiesDetails
2173	Disclosure of reconciliation of liabilities arising from financing activities [table]	Table	*	*	ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesTable
2174	Liabilities arising from financing activities [axis]	Axis			ifrs-full:LiabilitiesArisingFromFinancingActivitiesAxis
2175	Liabilities arising from financing activities [member]	Member			ifrs-full:LiabilitiesArisingFromFinancingActivitiesMember
2176	Financial liabilities at fair value through profit or loss	Member			ach:FinancialLiabilitiesAtFairValueThroughProfitOrLossMember
2177	Trade and notes payables	Member			ach:TradeAndNotesPayablesMember
2178	Financial liabilities included in other current payables and accrued expenses	Member			ach:FinancialLiabilitiesIncludedInOtherCurrentPayablesAndAccruedExpensesMember
2179	Financial liabilities included in other non-current liabilities	Member			ach:FinancialLiabilitiesIncludedInOtherNonCurrentLiabilitiesMember
2180	Interest bearing loans and borrowings	Member			ach:InterestBearingLoansAndBorrowingsMember
2181	Reconciliation of liabilities arising from financing activities	LineItems			ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems
2182	As at beginning of year	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesArisingFromFinancingActivities
2183	Net cash generated from operating activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInIncreasesInOperatingCapacity
2184	Net cash flows from/(used in) investing activities	Concept (Monetary)	For Period	Credit	ach:IncreaseDecreaseThroughInvestingCashFlowsLiabilitiesArisingFromFinancingActivities
2185	Payment of upfront interest of gold leasing arrangement	Concept (Monetary)	For Period	Credit	ach:IncreaseThroughProceedsFromUpfrontInterestOfGoldLeasingArrangementLiabilitiesArisingFromFinancingActivities
2186	Proceeds from issuance of short-term bonds and medium-term notes, net of issuance costs	Concept (Monetary)	For Period	Credit	ach:IncreaseThroughIssuanceOfBondsAndNotesNetOfIssuanceCostsLiabilitiesArisingFromFinancingActivities
2187	Repayments of medium-term notes and short-term bonds	Concept (Monetary)	For Period	Debit	ach:DecreaseThroughRepaymentsOfBondsAndNotesLiabilitiesArisingFromFinancingActivities
2188	Repayments of gold leasing arrangement	Concept (Monetary)	For Period	Debit	ach:DecreaseThroughRepaymentsOfGoldLeasingArrangementLiabilitiesArisingFromFinancingActivities
2189	Drawdown of short-term and long-term bank and other loans	Concept (Monetary)	For Period	Credit	ach:IncreaseThroughDrawdownOfShortTermAndLongTermBankAndOtherLoansLiabilitiesArisingFromFinancingActivitiesNetOfIssuanceCosts
2190	Repayments of short-term and long-term bank and other loans	Concept (Monetary)	For Period	Debit	ach:DecreaseThroughRepaymentsOfShortTermAndLongTermBankAndOtherLoansLiabilitiesArisingFromFinancingActivities
2191	Proceeds from finance lease, net of deposit and transaction costs	Concept (Monetary)	For Period	Credit	ach:IncreaseThroughProceedsFromFinanceLeaseNetOfDepositAndTransactionCostsLiabilitiesArisingFromFinancingActivities
2192	Capital elements of finance lease rental payment	Concept (Monetary)	For Period	Debit	ach:DecreaseThroughCapitalElementsOfFinanceLeaseRentalPaymentLiabilitiesArisingFromFinancingActivities
2193	Dividends paid by subsidiaries to non-controlling shareholders	Concept (Monetary)	For Period	Credit	ach:IncreaseThroughDividendPaidBySubsidiariesToNonControllingInterestLiabilitiesArisingFromFinancingActivities
2194	Amortization of unrecognized finance expenses and interest expense	Concept (Monetary)	For Period	Credit	ach:IncreaseThroughAmortizationOfUnrecognizedFinanceExpensesAndInterestExpensesAndInterestExpenseLiabilitiesArisingFromFinancingActivities
2195	Interest paid	Concept (Monetary)	For Period	Debit	ach:DecreaseThroughInterestPaymentsLiabilitiesArisingFromFinancingActivities
2196	Reclassification	Concept (Monetary)	For Period	Credit	ach:IncreaseDecreaseThroughReclassificationLiabilitiesArisingFromFinancingActivities
2197	Net cash (used in)/ generated from financing activities	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseInLiabilitiesArisingFromFinancingActivities
2198	Net foreign exchange differences	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities
2199	As at end of year	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesArisingFromFinancingActivities
2200	43501 - Disclosure - SIGNIFICANT RELATED PARTY BALANCES AND TRANSACTIONS - Significant related party transactions - Table Content (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureSignificantRelatedPartyBalancesAndTransactionsSignificantRelatedPartyTransactionsTableContentDetails
2201	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2202	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2203	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2204	Related parties	Member			ifrs-full:RelatedPartiesMember
2205	Chinalco and its subsidiaries	Member			ach:ChinalcoAndItsSubsidiariesMember
2206	Associates of Chinalco	Member			ach:AssociatesOfChinalcoMember
2207	Joint ventures	Member			ifrs-full:JointVenturesWhereEntityIsVenturerMember
2208	Associates	Member			ifrs-full:AssociatesMember
2209	Shandong Aluminum, Shanxi Aluminum Plant and China Great Wall Aluminum Corporation	Member			ach:SubsidiariesOfChinalcoMember
2210	IFRS Related Party Transaction [Axis]	Axis			ach:IfrsRelatedPartyTransactionAxis
2211	IFRS Related Party Transaction [Domain]	Member			ach:IfrsRelatedPartyTransactionDomain
2212	Provision of engineering, construction and supervisory services	Member			ach:ProvisionOfEngineeringConstructionAndSupervisoryServicesMember
2213	Rental revenue of land use rights and buildings	Member			ach:RentalRevenueOfLandUseRightsAndBuildingsMember
2214	Purchases of engineering, construction and supervisory services	Member			ach:PurchasesOfEngineeringConstructionAndSupervisoryServicesMember
2215	Purchases of key and auxiliary materials, equipment and finished goods	Member			ach:PurchasesOfKeyAndAuxiliaryMaterialsEquipmentAndFinishedGoodsMember
2216	Provision of social services and logistics services	Member			ach:ProvisionOfSocialServicesAndLogisticsServicesMember
2217	Provision of utilities services	Member			ach:ProvisionOfUtilitiesServicesMember
2218	Provision of other services	Member			ach:ProvisionOfOtherServicesMember
2219	Rental expenses for buildings and land use rights	Member			ach:RentalExpensesForBuildingsAndLandUseRightsMember
2220	Significant related party transactions	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2221	Sales of goods and services rendered	Abstract			ach:SalesOfGoodsAndServicesRenderedAbstract
2222	Sales of materials and finished goods	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions
2223	Services rendered	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromRenderingOfServicesRelatedPartyTransactions
2224	Rental revenue of land use rights and buildings	Concept (Monetary)	For Period		ifrs-full:LeasesAsLessorRelatedPartyTransactions
2225	Provision of utility services	Concept (Monetary)	For Period	Credit	ach:UtilityServicesRenderedRelatedPartyTransactions
2226	Purchase of goods and services	Abstract			ach:PurchaseOfGoodsAndServicesAbstract
2227	Purchase of services	Concept (Monetary)	For Period	Debit	ifrs-full:ServicesReceivedRelatedPartyTransactions
2228	Purchase of goods	Concept (Monetary)	For Period	Debit	ifrs-full:PurchasesOfGoodsRelatedPartyTransactions
2229	Rental expenses for buildings and land use rights charged	Concept (Monetary)	For Period		ifrs-full:LeasesAsLesseeRelatedPartyTransactions
2230	Other significant related party transactions	Abstract			ach:OtherSignificantRelatedPartyTransactionsAbstract
2231	Borrowing from related parties	Concept (Monetary)	For Period	Debit	ach:BorrowingRelatedPartyTransactions
2232	Interest expense on borrowings, discounted notes and factoring arrangement from related parties	Concept (Monetary)	For Period	Debit	ach:InterestExpenseRelatedPartyTransactions
2233	Entrusted loans and other borrowings to related parties	Concept (Monetary)	For Period	Debit	ach:EntrustedLoanAndOtherBorrowingToRelatedPartyTransactions
2234	Interest income on entrusted loans and other borrowings to related parties	Concept (Monetary)	For Period	Credit	ach:InterestIncomeOnEntrustedLoansAndOtherBorrowingsRelatedPartyTransactions
2235	Interest income from the unpaid disposal proceeds from related parties	Concept (Monetary)	For Period	Credit	ach:InterestIncomeFromUnpaidDisposalProceedsRelatedPartyTransactions
2236	Disposal assets under sale and leaseback contract to related parties	Concept (Monetary)	For Period	Credit	ach:DisposalAssetsUnderSaleAndLeasebackContractRelatedPartyTransactions
2237	Finance lease under a sale and leaseback contract from related parties	Concept (Monetary)	For Period	Debit	ach:FinanceLeasesAsLesseeRelatedPartyTransactions
2238	Trade receivable factoring arrangement from related parties	Concept (Monetary)	As Of	Debit	ach:TradeReceivableFactoringArrangementRelatedPartyTransactions
2239	Discounted notes receivable to a related parties	Concept (Monetary)	As Of	Credit	ach:DiscountedNotesPayableRelatedPartyTransactions
2240	Financial guarantee provided to related party	Concept (Monetary)	For Period		ifrs-full:ProvisionOfGuaranteesOrCollateralByEntityRelatedPartyTransactions
2241	Financial guarantees provided	Concept (Monetary)	For Period		ifrs-full:ProvisionOfGuaranteesOrCollateralToEntityRelatedPartyTransactions
2242	43502 - Disclosure - SIGNIFICANT RELATED PARTY BALANCES AND TRANSACTIONS - Significant related party transactions - Paragraph Content (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureSignificantRelatedPartyBalancesAndTransactionsSignificantRelatedPartyTransactionsParagraphContentDetails
2243	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2244	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2245	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2246	Related parties	Member			ifrs-full:RelatedPartiesMember
2247	Northeast Light Alloy Co., Ltd	Member			ach:NortheastLightAlloyCoLtdMember
2248	China Great Wall Aluminum Co., Ltd	Member			ach:ChinaGreatWallAluminumCoLtdMember
2249	Henan Great Wall Zhongxin Industrial Co., Ltd	Member			ach:HenanGreatWallZhongxinIndustrialCoLtdMember
2250	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2251	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
2252	Ningxia Energy	Member			ach:ChinaAluminumNingxiaEnergyGroupCompanyLimitedMember
2253	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
2254	Entity's total for joint ventures [member]	Member			ifrs-full:EntitysTotalForJointVenturesMember
2255	Tian Jing Shen Zhou Wind Power Co., Ltd	Member			ach:TianJingShenZhouWindPowerCo.LtdMember
2256	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
2257	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
2258	Chibi Great Wall Carbon Products Co., Ltd	Member			ach:ChibiGreatWallCarbonProductsCoLtdMember
2259	East Light Logistics	Member			ach:EastLightLogisticsMember
2260	Significant related party transactions	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2261	Bank loan term (in years)	Concept (xbrli:durationItemType)	For Period		ach:TermOfBorrowings
2262	Financial guarantees provided	Concept (Monetary)	For Period		ifrs-full:ProvisionOfGuaranteesOrCollateralToEntityRelatedPartyTransactions
2263	Outstanding financial guarantee amount	Concept (Monetary)	For Period	Credit	ach:OutstandingFinancialGuaranteeRelatedPartyTransactions
2264	Equity interest acquired (as a percent)	Concept (Percent)	As Of		ifrs-full:PercentageOfVotingEquityInterestsAcquired
2265	43503 - Disclosure - SIGNIFICANT RELATED PARTY BALANCES AND TRANSACTIONS - Balances with related parties (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureSignificantRelatedPartyBalancesAndTransactionsBalancesWithRelatedPartiesDetails
2266	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2267	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2268	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2269	Related parties	Member			ifrs-full:RelatedPartiesMember
2270	Shandong Aluminum, Shanxi Aluminum Plant and China Great Wall Aluminum Corporation	Member			ach:SubsidiariesOfChinalcoMember
2271	Chinalco and its subsidiaries	Member			ach:ChinalcoAndItsSubsidiariesMember
2272	Associates of Chinalco	Member			ach:AssociatesOfChinalcoMember
2273	Joint ventures	Member			ifrs-full:JointVenturesWhereEntityIsVenturerMember
2274	Associates	Member			ifrs-full:AssociatesMember
2275	Chinalco	Member			ifrs-full:ParentMember
2276	Chinalco Finance	Member			ach:ChinalcoFinanceCompanyLimitedMember
2277	Other state-owned enterprises	Member			ach:OtherGovernmentRelatedEntitiesAndTheirSubsidiariesMember
2278	Significant related party transactions	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2279	Balances with related parties	Abstract			ifrs-full:OutstandingBalancesForRelatedPartyTransactionsAbstract
2280	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ach:CashAndCashEquivalentsDepositedWithRelatedParties
2281	Trade and notes receivables, before provision for impairment	Concept (Monetary)	As Of	Debit	ach:TradeAndNotesReceivablesDueFromRelatedPartiesBeforeProvisionForImpairment
2282	Provision for impairment of receivables	Concept (Monetary)	As Of	Credit	ifrs-full:ProvisionsForDoubtfulDebtsRelatedToOutstandingBalancesOfRelatedPartyTransaction
2283	Trade and notes receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherReceivablesDueFromRelatedParties
2284	Renewal term of financial service agreement	Concept (xbrli:durationItemType)	For Period		ach:RenewalTermOfFinancialServiceAgreement
2285	Other current assets, before provision for impairment	Concept (Monetary)	As Of	Debit	ach:OtherCurrentAssetsDueFromRelatedPartiesBeforeProvisionForImpairment
2286	Provision for impairment of other current assets	Concept (Monetary)	As Of	Credit	ach:ProvisionsForImpairmentOfOtherCurrentAssetsRelatedToOutstandingBalancesOfRelatedPartyTransaction
2287	Other current assets	Concept (Monetary)	As Of	Debit	ach:OtherCurrentAssetsDueFromRelatedParties
2288	Other non-current assets	Concept (Monetary)	As Of	Debit	ach:OtherNonCurrentAssetsDueFromRelatedParties
2289	Borrowings and finance lease payables	Concept (Monetary)	As Of	Credit	ach:BorrowingsAndFinanceLeaseDueToRelatedParties
2290	Trade and notes payables	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayablesToRelatedParties
2291	Other payables and accrued liabilities	Concept (Monetary)	As Of	Credit	ach:OtherPayablesAndAccruedLiabilitiesDueToRelatedParties
2292	Contract Liabilities	Concept (Monetary)	For Period	Credit	ach:ContractLiabilitiesDueToRelatedParties
2293	Long-term loans and borrowings payable	Concept (Monetary)	As Of	Credit	ach:LongTermLoansAndBorrowingsDueToRelatedParties
2294	Short-term loans and borrowings payable	Concept (Monetary)	As Of	Credit	ach:ShortTermLoansAndBorrowingsDueToRelatedParties
2295	43504 - Disclosure - SIGNIFICANT RELATED PARTY BALANCES AND TRANSACTIONS - Compensation of key management personnel (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureSignificantRelatedPartyBalancesAndTransactionsCompensationOfKeyManagementPersonnelDetails
2296	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2297	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2298	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2299	Key management personnel	Member			ifrs-full:KeyManagementPersonnelOfEntityOrParentMember
2300	Significant related party transactions	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2301	Fees	Concept (Monetary)	For Period	Debit	ach:KeyManagementPersonnelCompensationFees
2302	Basic salaries, housing fund, other allowances and benefits in kind	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
2303	Pension costs	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits
2304	Total remuneration	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensation
2305	43601 - Disclosure - FINANCIAL AND CAPITAL RISK MANAGEMENT (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinancialAndCapitalRiskManagementDetails
2306	Disclosure of nature and extent of risks arising from financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
2307	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
2308	Risks [member]	Member			ifrs-full:TypesOfRisksMember
2309	Foreign currency risk	Member			ifrs-full:CurrencyRiskMember
2310	Interest rate risk	Member			ifrs-full:InterestRateRiskMember
2311	FINANCIAL AND CAPITAL RISK MANAGEMENT	LineItems			ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
2312	Higher/lower in risk assumption (as a percent)	Concept (Percent)	As Of		ach:PercentageOfReasonablyPossibleIncreaseOrDecreaseInRiskAssumption
2313	Total comprehensive income for the year would have been lower/higher by higher/lower in risk assumption	Concept (Monetary)	As Of		ach:DecreaseOrIncreaseInComprehensiveIncomeDueToReasonablyPossibleIncreaseOrDecreaseInDesignatedRiskComponent
2314	43602 - Disclosure - FINANCIAL AND CAPITAL RISK MANAGEMENT - Commodity price risk (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinancialAndCapitalRiskManagementCommodityPriceRiskDetails
2315	Disclosure of nature and extent of risks arising from financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
2316	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
2317	Risks [member]	Member			ifrs-full:TypesOfRisksMember
2318	Commodity price risk	Member			ifrs-full:CommodityPriceRiskMember
2319	Commodity Production Type Axis	Axis			ach:CommodityProductionTypeAxis
2320	Production Type [Member]	Member			ach:ProductionTypeMember
2321	Primary aluminum	Member			ach:PrimaryAluminumMember
2322	Copper	Member			ach:CopperMember
2323	Zinc	Member			ach:ZincMember
2324	Coal	Member			ach:CoalMember
2325	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
2326	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
2327	Futures contracts	Member			ifrs-full:FuturesContractMember
2328	Types of financial liabilities [axis]	Axis			ifrs-full:TypesOfFinancialLiabilitiesAxis
2329	Financial liabilities, type [member]	Member			ifrs-full:FinancialLiabilitiesTypeMember
2330	Futures contracts	Member			ifrs-full:FuturesContractMember
2331	Categories of financial assets [axis]	Axis			ifrs-full:CategoriesOfFinancialAssetsAxis
2332	Financial assets, category [member]	Member			ifrs-full:FinancialAssetsCategoryMember
2333	Financial assets at fair value through profit or loss	Member			ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
2334	Categories of financial liabilities [axis]	Axis			ifrs-full:CategoriesOfFinancialLiabilitiesAxis
2335	Financial liabilities, category [member]	Member			ifrs-full:FinancialLiabilitiesCategoryMember
2336	Financial liabilities at fair value through profit or loss	Member			ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember
2337	FINANCIAL AND CAPITAL RISK MANAGEMENT	LineItems			ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
2338	Increased/decreased in risk assumption (as a percent)	Concept (Percent)	As Of		ach:PercentageOfReasonablyPossibleIncreaseOrDecreaseInRiskAssumption
2339	Increased/decreased profit for the year by increased/decreased of risk assumption	Concept (Monetary)	As Of		ach:DecreaseOrIncreaseInProfitAndLossDueToReasonablyPossibleIncreaseOrDecreaseInDesignatedRiskComponent
2340	Fair values of the outstanding financial asset	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValue
2341	Fair values of the outstanding financial liability	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilitiesAtFairValue
2342	43603 - Disclosure - FINANCIAL AND CAPITAL RISK MANAGEMENT - Credit risk (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinancialAndCapitalRiskManagementCreditRiskDetails
2343	Disclosure of nature and extent of risks arising from financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
2344	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
2345	Risks [member]	Member			ifrs-full:TypesOfRisksMember
2346	Credit risk	Member			ifrs-full:CreditRiskMember
2347	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2348	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2349	Related parties	Member			ifrs-full:RelatedPartiesMember
2350	Entities directly or indirectly owned or controlled by the PRC government including Chinalco	Member			ach:EntitiesDirectlyOrIndirectlyOwnedOrControlledByPrcGovernmentIncludingChinalcoMember
2351	Type of measurement of expected credit losses [axis]	Axis			ifrs-full:TypeOfMeasurementOfExpectedCreditLossesAxis
2352	Type of measurement of expected credit losses [member]	Member			ifrs-full:TypeOfMeasurementOfExpectedCreditLossesMember
2353	12-month expected credit losses	Member			ifrs-full:TwelvemonthExpectedCreditLossesMember
2354	Lifetime expected credit losses	Member			ifrs-full:LifetimeExpectedCreditLossesMember
2355	Method of assessment of expected credit losses [axis]	Axis			ifrs-full:MethodOfAssessmentOfExpectedCreditLossesAxis
2356	Method of assessment of expected credit losses [member]	Member			ifrs-full:MethodOfAssessmentOfExpectedCreditLossesMember
2357	Stage 1	Member			ach:StageOneMember
2358	Stage 2	Member			ach:StageTwoMember
2359	Stage 3	Member			ach:StageThreeMember
2360	Simplified	Member			ach:SimplifiedMember
2361	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
2362	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
2363	Trade receivables	Member			ifrs-full:TradeReceivablesMember
2364	Other current assets	Member			ach:FinancialAssetsIncludedInOtherCurrentAssetsMember
2365	Notes receivable	Member			ach:IfrsNotesReceivableMember
2366	Restricted cash	Member			ach:RestrictedCashMember
2367	Cash and cash equivalents	Member			ach:IfrsCashAndCashEquivalentsMember
2368	Other non-current assets	Member			ach:FinancialAssetsIncludedInOtherNonCurrentAssetsMember
2369	Financial guarantees - not yet past due	Member			ifrs-full:FinancialGuaranteeContractsMember
2370	FINANCIAL AND CAPITAL RISK MANAGEMENT	LineItems			ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
2371	Guarantees provided to a third party	Concept (Monetary)	As Of	Credit	ifrs-full:ExposureToCreditRiskOnLoanCommitmentsAndFinancialGuaranteeContracts
2372	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
2373	Revenues derived from entities directly or indirectly owned or controlled by the PRC government including Chinalco	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions
2374	43604 - Disclosure - FINANCIAL AND CAPITAL RISK MANAGEMENT - Liquidity risk (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinancialAndCapitalRiskManagementLiquidityRiskDetails
2375	Disclosure of nature and extent of risks arising from financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
2376	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
2377	Risks [member]	Member			ifrs-full:TypesOfRisksMember
2378	Liquidity risk	Member			ifrs-full:LiquidityRiskMember
2379	Types of financial liabilities [axis]	Axis			ifrs-full:TypesOfFinancialLiabilitiesAxis
2380	Financial liabilities, type [member]	Member			ifrs-full:FinancialLiabilitiesTypeMember
2381	Futures contracts	Member			ifrs-full:FuturesContractMember
2382	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
2383	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
2384	Banking facilities	Member			ach:IfrsLineOfCreditMember
2385	FINANCIAL AND CAPITAL RISK MANAGEMENT	LineItems			ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
2386	Credit facilities	Concept (Monetary)	As Of	Credit	ach:IfrsLineOfCreditFacilityMaximumBorrowingCapacity
2387	Facilities utilized	Concept (Monetary)	As Of	Credit	ifrs-full:UndrawnBorrowingFacilities
2388	Banking facilities subject to renewal during the next 12 months	Concept (Monetary)	As Of	Credit	ach:UndrawnBorrowingFacilitiesSubjectToRenewal
2389	Unutilized banking facilities, renewal term	Concept (xbrli:durationItemType)	For Period		ach:UndrawnBorrowingFacilitiesRenewalTerm
2390	43605 - Disclosure - FINANCIAL AND CAPITAL RISK MANAGEMENT - Liquidity reserve (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinancialAndCapitalRiskManagementLiquidityReserveDetails
2391	Disclosure of maturity analysis for derivative financial liabilities [table]	Table	*	*	ifrs-full:DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesTable
2392	Legal Entity [Axis]	Axis			dei:LegalEntityAxis
2393	Entity [Domain]	Member			dei:EntityDomain
2394	The Group	Member			ach:ChalcoHongKongAndCompanyMember
2395	Maturity [axis]	Axis			ifrs-full:MaturityAxis
2396	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
2397	Within 1 year	Member			ifrs-full:NotLaterThanOneYearMember
2398	Past due for 1 to 2 years	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
2399	2 to 5 years	Member			ach:LaterThanTwoYearAndNotLaterThanFiveYearsMember
2400	After 5 years	Member			ifrs-full:LaterThanFiveYearsMember
2401	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
2402	Financial liabilities, class [member]	Member			ifrs-full:FinancialLiabilitiesMember
2403	Finance lease payables, including current portion	Member			ifrs-full:LeaseLiabilitiesMember
2404	Long-term bank and other loans, including current portion	Member			ach:LongTermBankAndOtherLoansMember
2405	Medium-term notes and bonds, including current portion	Member			ach:MediumTermNotesAndBondsMember
2406	Short-term bonds	Member			ach:ShortTermBondsMember
2407	Gold leasing arrangement	Member			ach:GoldLeasingArrangementMember
2408	Short-term bank and other loans	Member			ach:ShortTermBankAndOtherLoansMember
2409	Interest payables for borrowings	Member			ach:InterestPayablesForBorrowingsMember
2410	Financial liabilities at fair value through profit or loss	Member			ach:FinancialLiabilitiesAtFairValueThroughProfitOrLossMember
2411	Financial liabilities included in other payables and accrued liabilities, excluding accrued interest	Member			ach:FinancialLiabilitiesIncludedInOtherPayablesAndAccruedLiabilitiesExcludingAccruedInterestMember
2412	Financial liabilities included in other non-current liabilities	Member			ach:FinancialLiabilitiesIncludedInOtherNonCurrentLiabilitiesMember
2413	Trade and notes payables	Member			ach:TradeAndNotesPayablesMember
2414	Maturity Analysis For Derivative Financial Liabilities	LineItems			ifrs-full:DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems
2415	Total financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NonderivativeFinancialLiabilitiesUndiscountedCashFlows
2416	Carrying value of financial liabilities included in other non-current liabilities	Concept (Monetary)	As Of	Credit	ach:FinancialLiabilitiesIncludedInOtherNonCurrentLiabilities
2417	43606 - Disclosure - FINANCIAL AND CAPITAL RISK MANAGEMENT - Financial instruments by category (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinancialAndCapitalRiskManagementFinancialInstrumentsByCategoryDetails
2418	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
2419	Legal Entity [Axis]	Axis			dei:LegalEntityAxis
2420	Entity [Domain]	Member			dei:EntityDomain
2421	The Group	Member			ach:ChalcoHongKongAndCompanyMember
2422	Categories of financial assets [axis]	Axis			ifrs-full:CategoriesOfFinancialAssetsAxis
2423	Financial assets, category [member]	Member			ifrs-full:FinancialAssetsCategoryMember
2424	Financial assets at fair value through profit or loss	Member			ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
2425	Loans and receivables	Member			ifrs-full:LoansAndReceivablesCategoryMember
2426	Financial assets available-for-sale	Member			ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
2427	Held for trading	Member			ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTradingCategoryMember
2428	Financial assets at amortized cost	Member			ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember
2429	Equity investments designated at fair value through other comprehensive income	Member			ifrs-full:InvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember
2430	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
2431	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
2432	Trade and notes receivables	Member			ach:TradeAndNotesReceivablesCurrentMember
2433	Financial assets at fair value through profit or loss	Member			ach:FinancialAssetsAtFairValueThroughProfitOrLossCurrentMember
2434	Restricted cash and time deposits	Member			ach:RestrictedCashAndTimeDepositsMember
2435	Cash and cash equivalents	Member			ach:IfrsCashAndCashEquivalentsMember
2436	Other current assets	Member			ach:FinancialAssetsIncludedInOtherCurrentAssetsMember
2437	Available-for-sale financial investments	Member			ach:AvailableForSaleFinancialInvestmentsNonCurrentMember
2438	Other non-current assets	Member			ach:FinancialAssetsIncludedInOtherNonCurrentAssetsMember
2439	Equity investments designated at fair value through other comprehensive income	Member			ifrs-full:EquityInvestmentsMember
2440	Other non-current assets	Member			ach:IfrsOtherNoncurrentAssetsMember
2441	Categories of financial liabilities [axis]	Axis			ifrs-full:CategoriesOfFinancialLiabilitiesAxis
2442	Financial liabilities, category [member]	Member			ifrs-full:FinancialLiabilitiesCategoryMember
2443	Financial liabilities at fair value through profit or loss	Member			ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember
2444	Held for trading	Member			ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLossThatMeetDefinitionOfHeldForTradingCategoryMember
2445	Financial liabilities at amortized cost	Member			ifrs-full:FinancialLiabilitiesAtAmortisedCostCategoryMember
2446	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
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2448	Financial liabilities at fair value through profit or loss	Member			ach:FinancialLiabilitiesAtFairValueThroughProfitOrLossCurrentMember
2449	Interest-bearing loans and borrowings	Member			ach:InterestBearingLoansAndBorrowingsCurrentMember
2450	Financial liabilities included in other payables and accrued liabilities	Member			ach:FinancialLiabilitiesIncludedInOtherPayablesAndAccruedLiabilitiesCurrentMember
2451	Trade and notes payables	Member			ach:TradeAndNotesPayablesCurrentMember
2452	Financial liabilities included in other non-current liabilities	Member			ach:FinancialLiabilitiesIncludedInOtherNonCurrentLiabilitiesMember
2453	Long-term interest-bearing loans and borrowings	Member			ach:LongTermInterestBearingLoansAndBorrowingsMember
2454	OTHER CURRENT ASSETS	LineItems			ifrs-full:DisclosureOfFinancialAssetsLineItems
2455	Current financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentFinancialAssets
2456	Non-current financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentFinancialAssets
2457	Total financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
2458	Current financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentFinancialLiabilities
2459	Non-current financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentFinancialLiabilities
2460	Total financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
2461	43607 - Disclosure - FINANCIAL AND CAPITAL RISK MANAGEMENT - Fair value (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinancialAndCapitalRiskManagementFairValueDetails
2462	Disclosure of fair value measurement of assets [table]	Table	*	*	ifrs-full:DisclosureOfFairValueMeasurementOfAssetsTable
2463	Legal Entity [Axis]	Axis			dei:LegalEntityAxis
2464	Entity [Domain]	Member			dei:EntityDomain
2465	The Group	Member			ach:ChalcoHongKongAndCompanyMember
2466	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
2467	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
2468	At carrying amounts	Member			ifrs-full:NotMeasuredAtFairValueInStatementOfFinancialPositionButForWhichFairValueIsDisclosedMember
2469	At fair values	Member			ifrs-full:AtFairValueMember
2470	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
2471	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
2472	Other non-current assets	Member			ach:IfrsOtherNoncurrentAssetsMember
2473	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
2474	Financial liabilities, class [member]	Member			ifrs-full:FinancialLiabilitiesMember
2475	Financial liabilities included in other non-current liabilities	Member			ach:FinancialLiabilitiesIncludedInOtherNonCurrentLiabilitiesMember
2476	Long-term interest-bearing loans and borrowings	Member			ach:LongTermInterestBearingLoansAndBorrowingsMember
2477	Fair Value Measurement Of Assets	LineItems			ifrs-full:DisclosureOfFairValueMeasurementOfAssetsLineItems
2478	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
2479	Financial liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
2480	Financial assets, at fair value	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValue
2481	Financial liabilities, at fair value	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilitiesAtFairValue
2482	43608 - Disclosure - FINANCIAL AND CAPITAL RISK MANAGEMENT - Fair value hierarchy (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinancialAndCapitalRiskManagementFairValueHierarchyDetails
2483	Disclosure of fair value measurement of assets [table]	Table	*	*	ifrs-full:DisclosureOfFairValueMeasurementOfAssetsTable
2484	Legal Entity [Axis]	Axis			dei:LegalEntityAxis
2485	Entity [Domain]	Member			dei:EntityDomain
2486	The Group	Member			ach:ChalcoHongKongAndCompanyMember
2487	Levels of fair value hierarchy [axis]	Axis			ifrs-full:LevelsOfFairValueHierarchyAxis
2488	All levels of fair value hierarchy [member]	Member			ifrs-full:AllLevelsOfFairValueHierarchyMember
2489	Quoted prices in active markets (Level 1)	Member			ifrs-full:Level1OfFairValueHierarchyMember
2490	Significant observable inputs (Level 2)	Member			ifrs-full:Level2OfFairValueHierarchyMember
2491	Significant unobservable inputs (Level 3)	Member			ifrs-full:Level3OfFairValueHierarchyMember
2492	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
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2494	Assets measured at fair value	Member			ifrs-full:FinancialAssetsAtFairValueMember
2495	Futures contracts	Member			ifrs-full:FuturesContractMember
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2499	Other non-current assets	Member			ach:FinancialAssetsIncludedInOtherNonCurrentAssetsMember
2500	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
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2503	Futures contracts	Member			ifrs-full:FuturesContractMember
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2505	Long-term interest-bearing loans and borrowings	Member			ach:LongTermInterestBearingLoansAndBorrowingsMember
2506	Fair value measurement of liabilities	LineItems			ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
2507	Assets measured at fair value	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValue
2508	Liabilities measured at fair value	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilitiesAtFairValue
2509	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
2510	Financial liabilities at amortized cost	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilitiesAtAmortisedCost
2511	43609 - Disclosure - FINANCIAL AND CAPITAL RISK MANAGEMENT - Transfers of fair value (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinancialAndCapitalRiskManagementTransfersOfFairValueDetails
2512	Implied Table	Table	*	*	implied:Table
2513	FINANCIAL AND CAPITAL RISK MANAGEMENT	Abstract			ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsAbstract
2514	Transfer of financial assets fair value from Level 1 to Level 2	Concept (Monetary)	For Period		ifrs-full:TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyAssets
2515	Transfer of financial assets fair value from Level 2 to Level 1	Concept (Monetary)	For Period		ifrs-full:TransfersOutOfLevel2IntoLevel1OfFairValueHierarchyAssets
2516	Transfer of financial liabilities fair value from Level 1 to Level 2	Concept (Monetary)	For Period		ifrs-full:TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyLiabilities
2517	Transfer of financial liabilities fair value from Level 2 to Level 1	Concept (Monetary)	For Period		ifrs-full:TransfersOutOfLevel2IntoLevel1OfFairValueHierarchyLiabilities
2518	Financial assets fair value transfer into Level 3	Concept (Monetary)	For Period	Debit	ifrs-full:TransfersIntoLevel3OfFairValueHierarchyAssets
2519	Financial assets fair value transfer out of Level 3	Concept (Monetary)	For Period	Credit	ifrs-full:TransfersOutOfLevel3OfFairValueHierarchyAssets
2520	Financial liabilities fair value transfer into Level 3	Concept (Monetary)	For Period	Credit	ifrs-full:TransfersIntoLevel3OfFairValueHierarchyLiabilities
2521	Financial liabilities fair value transfer out of Level 3	Concept (Monetary)	For Period	Debit	ifrs-full:TransfersOutOfLevel3OfFairValueHierarchyLiabilities
2522	43610 - Disclosure - FINANCIAL AND CAPITAL RISK MANAGEMENT - Valuation Inputs (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinancialAndCapitalRiskManagementValuationInputsDetails
2523	Disclosure of fair value measurement of assets [table]	Table	*	*	ifrs-full:DisclosureOfFairValueMeasurementOfAssetsTable
2524	Valuation techniques used in fair value measurement [axis]	Axis			ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis
2525	Valuation techniques [member]	Member			ifrs-full:ValuationTechniquesMember
2526	Net Assets Method	Member			ach:NetAssetsMethodMember
2527	Levels of fair value hierarchy [axis]	Axis			ifrs-full:LevelsOfFairValueHierarchyAxis
2528	All levels of fair value hierarchy [member]	Member			ifrs-full:AllLevelsOfFairValueHierarchyMember
2529	Significant unobservable inputs (Level 3)	Member			ifrs-full:Level3OfFairValueHierarchyMember
2530	Fair Value Measurement Of Assets	LineItems			ifrs-full:DisclosureOfFairValueMeasurementOfAssetsLineItems
2531	Equity investments in Size Industry Investment Fund	Concept (Monetary)	As Of	Debit	ach:EquityInvestmentsInSizeIndustryInvestmentFund
2532	43611 - Disclosure - FINANCIAL AND CAPITAL RISK MANAGEMENT - Gearing ratio (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureFinancialAndCapitalRiskManagementGearingRatioDetails
2533	Implied Table	Table	*	*	implied:Table
2534	FINANCIAL AND CAPITAL RISK MANAGEMENT	Abstract			ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsAbstract
2535	Gearing ratio	Abstract			ach:GearingRatioAbstract
2536	Total liabilities (excluding deferred tax liabilities, income tax payable and deferred government grants)	Concept (Monetary)	As Of	Credit	ach:LiabilitiesExcludingDeferredTaxLiabilitiesIncomeTaxPayableAndDeferredGovernmentGrants
2537	Less: restricted cash, time deposits and cash and cash equivalents	Concept (Monetary)	As Of	Debit	ach:CashAndCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
2538	Net debt	Concept (Monetary)	As Of	Credit	ifrs-full:NetDebt
2539	Total equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
2540	Add: net debt	Concept (Monetary)	As Of	Credit	ifrs-full:NetDebt
2541	Less: non-controlling interests	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
2542	Total capital attributable to owners of the parent	Concept (Monetary)	As Of	Credit	ach:TotalCapitalAttributableToOwnersOfParent
2543	Gearing ratio	Concept (Pure)	As Of		ach:GearingRatio
2544	43701 - Disclosure - PARTLY-OWNED SUBSIDIARIES WITH MATERIAL NON-CONTROLLING INTERESTS (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosurePartlyOwnedSubsidiariesWithMaterialNonControllingInterestsDetails
2545	Disclosure of subsidiaries [table]	Table	*	*	ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
2546	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2547	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
2548	Ningxia Energy	Member			ach:ChinaAluminumNingxiaEnergyGroupCompanyLimitedMember
2549	Guizhou Huajin	Member			ach:GuizhouHuajinMember
2550	Guizhou Huaren	Member			ach:GuizhouHuarenMember
2551	Huayun	Member			ach:InnerMongoliaHuayunNewMaterialCo.LtdHuayunMember
2552	PARTLY-OWNED SUBSIDIARIES WITH MATERIAL NON-CONTROLLING INTERESTS	LineItems			ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
2553	Percentage of equity interest held by non-controlling interests	Concept (Percent)	For Period		ifrs-full:ProportionOfVotingRightsHeldByNoncontrollingInterests
2554	Profit/(loss) for the year allocated to non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToNoncontrollingInterests
2555	Dividends distributed to non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:DividendsPaidToNoncontrollingInterests
2556	Accumulated balances of non-controlling interests at the reporting dates	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
2557	Percentage of voting rights	Concept (Percent)	For Period		ifrs-full:ProportionOfVotingPowerHeldInSubsidiary
2558	Revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
2559	Total expenses	Concept (Monetary)	For Period	Debit	ifrs-full:OperatingExpense
2560	Profit for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
2561	Total comprehensive income for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
2562	Current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
2563	Non-current assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
2564	Current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
2565	Non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
2566	Net cash flows from operating activities	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperatingActivities
2567	Net cash flows used in investing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivities
2568	Net cash flows from/(used in) financing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivities
2569	Effect of foreign exchange rate changes, net	Concept (Monetary)	For Period	Debit	ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
2570	Net increase/(decrease) in cash and cash equivalents	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
2571	43801 - Disclosure - BUSINESS COMBINATION - Acquisitions (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBusinessCombinationAcquisitionsDetails
2572	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
2573	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
2574	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
2575	Bayer aluminum production line	Member			ach:BayerAluminumProductionLineOfShandongAluminumMember
2576	Pseudoboehmite and activated silicon powder production lines	Member			ach:PseudoboehmiteAndActivatedSiliconPowderProductionLinesOfScienceAndTechnologyChemicalCompanyMember
2577	Chinalco Shanghai	Member			ach:ChinalcoShanghaiCompanyLimitedMember
2578	Xinghua Technology	Member			ach:ChinalcoShanxiJiaokouXinghuaTechnologyLimitedMember
2579	Qingdao Light Metal	Member			ach:ChinalcoQingdaoLightMetalCo.Ltd.Member
2580	Shanxi Aluminum Sewage Treatment Plant	Member			ach:SewageTreatmentPlantOfChalcoShanxiAluminumMember
2581	Yinxing Power	Member			ach:NingxiaYinxingPowerCo.LtdMember
2582	Counterparties [axis]	Axis			ifrs-full:CounterpartiesAxis
2583	Counterparties [member]	Member			ifrs-full:CounterpartiesMember
2584	Shanxi Aluminum Plant	Member			ach:ShanxiAluminumPlantMember
2585	Shandong Aluminum	Member			ach:ShandongAluminumMember
2586	Ningxia Energy	Member			ach:NingxiaEnergyMember
2587	Zhejiang Power	Member			ach:ZhejiangPowerGroupCo.LtdMember
2588	BUSINESS COMBINATION	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
2589	Registered capital	Concept (Monetary)	For Period	Credit	ach:RegisteredCapital
2590	Equity interest acquired (as a percent)	Concept (Percent)	As Of		ifrs-full:PercentageOfVotingEquityInterestsAcquired
2591	Number of directors can appoint	Concept (Integer)	For Period		ach:NumberOfDirectorsAppointed
2592	Number of directors in board	Concept (Integer)	For Period		ach:NumberOfDirectors
2593	Total equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
2594	Carrying amounts of the assets and liabilities of business acquired	Abstract			ifrs-full:AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract
2595	Assets	Abstract			ifrs-full:AssetsAbstract
2596	Investment properties	Concept (Monetary)	As Of	Debit	ach:InvestmentPropertiesAsOfAcquisitionDate
2597	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
2598	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate
2599	Land use rights	Concept (Monetary)	As Of	Debit	ach:LandUseRightsRecognisedAsOfAcquisitionDate
2600	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:InventoryRecognisedAsOfAcquisitionDate
2601	Other current assets	Concept (Monetary)	As Of	Debit	ach:OtherCurrentAssetsRecognisedAsOfAcquisitionDate
2602	Trade and notes receivables	Concept (Monetary)	As Of	Debit	ifrs-full:FairValueOfAcquiredReceivables
2603	Other non-current assets	Concept (Monetary)	As Of	Debit	ach:OtherNonCurrentAssetsRecognisedAsOfAcquisitionDate
2604	Restricted cash and time deposits	Concept (Monetary)	As Of	Debit	ach:RestrictedCashAndTimeDepositsRecognisedAsOfAcquisitionDate
2605	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
2606	Liabilities	Abstract			ifrs-full:LiabilitiesAbstract
2607	Trade and notes payables	Concept (Monetary)	As Of	Credit	ach:TradeAndNotePayablesRecognisedAsOfAcquisitionDate
2608	Other payables and accrued expenses	Concept (Monetary)	As Of	Credit	ach:OtherPayablesAndAccruedExpensesRecognisedAsOfAcquisitionDate
2609	Interest bearing loans and borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:BorrowingsRecognisedAsOfAcquisitionDate
2610	Interest bearing loans and borrowings (non-current)	Concept (Monetary)	As Of	Credit	ach:NonCurrentBorrowingsRecognisedAsOfAcquisitionDate
2611	Other non-current liabilities	Concept (Monetary)	As Of	Credit	ach:OtherNonCurrentLiabilitiesRecognisedAsOfAcquisitionDate
2612	Deferred tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate
2613	Interest bearing loans and borrowings	Concept (Monetary)	As Of	Credit	ach:CurrentBorrowingsRecognisedAsOfAcquisitionDate
2614	Income tax payable	Concept (Monetary)	As Of	Credit	ach:IncomeTaxPayableRecognisedAsOfAcquisitionDate
2615	Net assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
2616	Other equity instruments	Concept (Monetary)	As Of	Credit	ach:OtherEquityInstrumentsRecognisedAsOfAcquisitionDate
2617	Non-controlling interests	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate
2618	Net assets acquired	Concept (Monetary)	As Of	Debit	ach:EquityInterestsOfAcquiree
2619	Difference recognized in equity	Concept (Monetary)	As Of	Debit	ifrs-full:GoodwillRecognisedAsOfAcquisitionDate
2620	Cash consideration	Concept (Monetary)	As Of	Credit	ifrs-full:CashTransferred
2621	Carrying values of assets disposed of	Concept (Monetary)	As Of	Credit	ach:CarryingValuesOfAssetsDisposed
2622	Total purchase consideration	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
2623	Initial investment cost	Concept (Monetary)	As Of	Debit	ach:EquityMethodInvestmentInitialCost
2624	Investment income recognized under the equity method	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
2625	Book value of the investment	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentAccountedForUsingEquityMethod
2626	Fair value of the investment	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfEquityInterestInAcquireeHeldByAcquirerImmediatelyBeforeAcquisitionDate
2627	Gain on previously held equity interest remeasured at acquisition-date fair value	Concept (Monetary)	For Period	Credit	ifrs-full:GainLossRecognisedAsResultOfRemeasuringToFairValueEquityInterestInAcquireeHeldByAcquirerBeforeBusinessCombination
2628	Cash consideration paid	Concept (Monetary)	For Period	Credit	ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
2629	Cash and bank balances acquired	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
2630	Net inflow of cash and cash equivalents included in cash flows from investing activities	Concept (Monetary)	For Period	Debit	ach:CashAndCashEquivalentsReceivedOnAcquisitionOfSubsidiary
2631	Revenue	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueOfAcquiree
2632	Profit for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossOfAcquiree
2633	Net cash flows	Concept (Monetary)	For Period	Debit	ach:NetCashflowOfAcquireeSinceAcquisitionDate
2634	Consideration paid by way of transfer of notes receivables	Concept (Monetary)	As Of	Credit	ifrs-full:OtherTangibleOrIntangibleAssetsTransferred
2635	Consideration unpaid	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesIncurred
2636	43802 - Disclosure - BUSINESS COMBINATION - Guizhou Huaren (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBusinessCombinationGuizhouHuarenDetails
2637	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
2638	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
2639	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
2640	Guizhou Huaren	Member			ach:GuizhouHuarenNewMaterialCoLtdMember
2641	Counterparties [axis]	Axis			ifrs-full:CounterpartiesAxis
2642	Counterparties [member]	Member			ifrs-full:CounterpartiesMember
2643	Hangzhou Jinjiang	Member			ach:HangzhouJinjiangMember
2644	Shareholder one	Member			ach:ShareholderOneMember
2645	Shareholder two	Member			ach:ShareholderTwoMember
2646	BUSINESS COMBINATION	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
2647	Registered capital	Concept (Monetary)	For Period	Credit	ach:RegisteredCapital
2648	Equity interest acquired (as a percent)	Concept (Percent)	As Of		ifrs-full:PercentageOfVotingEquityInterestsAcquired
2649	Assets	Abstract			ifrs-full:AssetsAbstract
2650	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
2651	Land use rights	Concept (Monetary)	As Of	Debit	ach:LandUseRightsRecognisedAsOfAcquisitionDate
2652	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate
2653	Other current assets	Concept (Monetary)	As Of	Debit	ach:OtherCurrentAssetsRecognisedAsOfAcquisitionDate
2654	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:InventoryRecognisedAsOfAcquisitionDate
2655	Trade and notes receivables	Concept (Monetary)	As Of	Debit	ifrs-full:FairValueOfAcquiredReceivables
2656	Restricted cash	Concept (Monetary)	As Of	Debit	ifrs-full:RestrictedCashAndCashEquivalents
2657	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
2658	Liabilities	Abstract			ifrs-full:LiabilitiesAbstract
2659	Deferred tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate
2660	Interest bearing loans and borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:BorrowingsRecognisedAsOfAcquisitionDate
2661	Contract liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:ContractLiabilities
2662	Other payables and accrued expenses	Concept (Monetary)	As Of	Credit	ach:OtherPayablesAndAccruedExpensesRecognisedAsOfAcquisitionDate
2663	Trade and notes payables	Concept (Monetary)	As Of	Credit	ach:TradeAndNotePayablesRecognisedAsOfAcquisitionDate
2664	Net assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
2665	Non-controlling interests	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate
2666	Share of net assets acquired	Concept (Monetary)	As Of	Debit	ach:IdentifiableAssetsAcquiredLiabilitiesAssumedExcludingNonControllingInterest
2667	Difference recognized in equity	Concept (Monetary)	As Of	Debit	ifrs-full:GoodwillRecognisedAsOfAcquisitionDate
2668	Cash consideration	Concept (Monetary)	As Of	Credit	ifrs-full:CashTransferred
2669	Fair value of previously held equity interest	Concept (Monetary)	As Of	Credit	ifrs-full:EquityInterestsOfAcquirer
2670	Initial investment cost	Concept (Monetary)	As Of	Debit	ach:EquityMethodInvestmentInitialCost
2671	Investment income recognized under the equity method	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
2672	Book value of the investment	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentAccountedForUsingEquityMethod
2673	Fair value of the investment	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfEquityInterestInAcquireeHeldByAcquirerImmediatelyBeforeAcquisitionDate
2674	Gain on previously held equity interest remeasured at acquisition-date fair value	Concept (Monetary)	For Period	Credit	ifrs-full:GainLossRecognisedAsResultOfRemeasuringToFairValueEquityInterestInAcquireeHeldByAcquirerBeforeBusinessCombination
2675	Cash and bank balances acquired	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
2676	Net inflow of cash and cash equivalents included in cash flows from investing activities	Concept (Monetary)	For Period	Debit	ach:CashAndCashEquivalentsReceivedOnAcquisitionOfSubsidiary
2677	Revenue	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueOfAcquiree
2678	Profit for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossOfAcquiree
2679	Net cash flows	Concept (Monetary)	For Period	Debit	ach:NetCashflowOfAcquireeSinceAcquisitionDate
2680	43803 - Disclosure - BUSINESS COMBINATION - Shanxi Zhongrun (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBusinessCombinationShanxiZhongrunDetails
2681	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
2682	Counterparties [axis]	Axis			ifrs-full:CounterpartiesAxis
2683	Counterparties [member]	Member			ifrs-full:CounterpartiesMember
2684	Shareholder one	Member			ach:ShareholderOneMember
2685	Shareholder two	Member			ach:ShareholderTwoMember
2686	Shareholder three	Member			ach:ShareholderThreeMember
2687	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
2688	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
2689	Shanxi Zhongrun	Member			ach:ShanxiZhongrunMember
2690	BUSINESS COMBINATION	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
2691	Registered capital	Concept (Monetary)	For Period	Credit	ach:RegisteredCapital
2692	Equity interest acquired (as a percent)	Concept (Percent)	As Of		ifrs-full:PercentageOfVotingEquityInterestsAcquired
2693	Number of directors in board	Concept (Integer)	For Period		ach:NumberOfDirectors
2694	Number of directors can appoint	Concept (Integer)	For Period		ach:NumberOfDirectorsAppointed
2695	Assets	Abstract			ifrs-full:AssetsAbstract
2696	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
2697	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate
2698	Other current assets	Concept (Monetary)	As Of	Debit	ach:OtherCurrentAssetsRecognisedAsOfAcquisitionDate
2699	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:InventoryRecognisedAsOfAcquisitionDate
2700	Trade and notes receivables	Concept (Monetary)	As Of	Debit	ifrs-full:FairValueOfAcquiredReceivables
2701	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
2702	Liabilities	Abstract			ifrs-full:LiabilitiesAbstract
2703	Deferred tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate
2704	Interest bearing loans and borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:BorrowingsRecognisedAsOfAcquisitionDate
2705	Other payables and accrued expenses	Concept (Monetary)	As Of	Credit	ach:OtherPayablesAndAccruedExpensesRecognisedAsOfAcquisitionDate
2706	Trade and notes payables	Concept (Monetary)	As Of	Credit	ach:TradeAndNotePayablesRecognisedAsOfAcquisitionDate
2707	Net assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
2708	Non-controlling interests	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate
2709	Share of net assets acquired	Concept (Monetary)	As Of	Debit	ach:IdentifiableAssetsAcquiredLiabilitiesAssumedExcludingNonControllingInterest
2710	Difference recognized in equity	Concept (Monetary)	As Of	Debit	ifrs-full:GoodwillRecognisedAsOfAcquisitionDate
2711	Cash consideration	Concept (Monetary)	As Of	Credit	ifrs-full:CashTransferred
2712	Fair value of previously held equity interest	Concept (Monetary)	As Of	Credit	ifrs-full:EquityInterestsOfAcquirer
2713	Initial investment cost	Concept (Monetary)	As Of	Debit	ach:EquityMethodInvestmentInitialCost
2714	Investment income recognized under the equity method	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
2715	Book value of the investment	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentAccountedForUsingEquityMethod
2716	Fair value of the investment	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfEquityInterestInAcquireeHeldByAcquirerImmediatelyBeforeAcquisitionDate
2717	Gain on previously held equity interest remeasured at acquisition-date fair value	Concept (Monetary)	For Period	Credit	ifrs-full:GainLossRecognisedAsResultOfRemeasuringToFairValueEquityInterestInAcquireeHeldByAcquirerBeforeBusinessCombination
2718	Cash and bank balances acquired	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
2719	Net inflow of cash and cash equivalents included in cash flows from investing activities	Concept (Monetary)	For Period	Debit	ach:CashAndCashEquivalentsReceivedOnAcquisitionOfSubsidiary
2720	Revenue	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueOfAcquiree
2721	Profit for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossOfAcquiree
2722	Net cash flows	Concept (Monetary)	For Period	Debit	ach:NetCashflowOfAcquireeSinceAcquisitionDate
2723	43804 - Disclosure - BUSINESS COMBINATION - Shanxi Huaxing (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBusinessCombinationShanxiHuaxingDetails
2724	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
2725	Counterparties [axis]	Axis			ifrs-full:CounterpartiesAxis
2726	Counterparties [member]	Member			ifrs-full:CounterpartiesMember
2727	Chalco Hong Kong	Member			ach:ChalcoHongKongLimitedMember
2728	Baotou Communication Investment Group Limited [Member]	Member			ach:BaotouCommunicationInvestmentGroupLimitedMember
2729	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
2730	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
2731	Shanxi Huaxing	Member			ach:ShanxiHuaxingMember
2732	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
2733	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
2734	Shanxi Huaxing	Member			ach:ShanxiHuaxingMember
2735	Legal Entity [Axis]	Axis			dei:LegalEntityAxis
2736	Entity [Domain]	Member			dei:EntityDomain
2737	The Group	Member			ach:ChalcoHongKongAndCompanyMember
2738	BUSINESS COMBINATION	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
2739	Proportion of ownership interest in associate	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInAssociate
2740	Equity interest acquired (as a percent)	Concept (Percent)	As Of		ifrs-full:PercentageOfVotingEquityInterestsAcquired
2741	Assets	Abstract			ifrs-full:AssetsAbstract
2742	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
2743	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate
2744	Land use rights	Concept (Monetary)	As Of	Debit	ach:LandUseRightsRecognisedAsOfAcquisitionDate
2745	Deferred tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssetsRecognisedAsOfAcquisitionDate
2746	Other non-current assets	Concept (Monetary)	As Of	Debit	ach:OtherNonCurrentAssetsRecognisedAsOfAcquisitionDate
2747	Other current assets	Concept (Monetary)	As Of	Debit	ach:OtherCurrentAssetsRecognisedAsOfAcquisitionDate
2748	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:InventoryRecognisedAsOfAcquisitionDate
2749	Trade and notes receivables	Concept (Monetary)	As Of	Debit	ifrs-full:FairValueOfAcquiredReceivables
2750	Restricted cash	Concept (Monetary)	As Of	Debit	ifrs-full:RestrictedCashAndCashEquivalents
2751	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
2752	Liabilities	Abstract			ifrs-full:LiabilitiesAbstract
2753	Deferred tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate
2754	Interest bearing loans and borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:BorrowingsRecognisedAsOfAcquisitionDate
2755	Other non-current liabilities	Concept (Monetary)	As Of	Credit	ach:OtherNonCurrentLiabilitiesRecognisedAsOfAcquisitionDate
2756	Contract liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:ContractLiabilities
2757	Other payables and accrued expenses	Concept (Monetary)	As Of	Credit	ach:OtherPayablesAndAccruedExpensesRecognisedAsOfAcquisitionDate
2758	Trade and notes payables	Concept (Monetary)	As Of	Credit	ach:TradeAndNotePayablesRecognisedAsOfAcquisitionDate
2759	Net assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
2760	Non-controlling interests	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate
2761	Share of net assets acquired	Concept (Monetary)	As Of	Debit	ach:IdentifiableAssetsAcquiredLiabilitiesAssumedExcludingNonControllingInterest
2762	Difference recognized in equity	Concept (Monetary)	As Of	Debit	ifrs-full:GoodwillRecognisedAsOfAcquisitionDate
2763	Cash consideration	Concept (Monetary)	As Of	Credit	ifrs-full:CashTransferred
2764	Fair value of previously held equity interest	Concept (Monetary)	As Of	Credit	ifrs-full:EquityInterestsOfAcquirer
2765	Equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
2766	Initial investment cost	Concept (Monetary)	As Of	Debit	ach:EquityMethodInvestmentInitialCost
2767	Investment income recognized under the equity method	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
2768	Share of changes in reserves under the equity method	Concept (Monetary)	For Period	Credit	ach:ShareOfChangesInReservesOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
2769	Cash dividends declared	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsRecognisedAsDistributionsToOwnersOfParent
2770	Book value of the investment	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentAccountedForUsingEquityMethod
2771	Fair value of the investment	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfEquityInterestInAcquireeHeldByAcquirerImmediatelyBeforeAcquisitionDate
2772	Gain on previously held equity interest remeasured at acquisition-date fair value	Concept (Monetary)	For Period	Credit	ifrs-full:GainLossRecognisedAsResultOfRemeasuringToFairValueEquityInterestInAcquireeHeldByAcquirerBeforeBusinessCombination
2773	Cash and bank balances acquired	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
2774	Net inflow of cash and cash equivalents included in cash flows from investing activities	Concept (Monetary)	For Period	Debit	ach:CashAndCashEquivalentsReceivedOnAcquisitionOfSubsidiary
2775	Revenue	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueOfAcquiree
2776	Profit for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossOfAcquiree
2777	Net cash flows	Concept (Monetary)	For Period	Debit	ach:NetCashflowOfAcquireeSinceAcquisitionDate
2778	43805 - Disclosure - BUSINESS COMBINATION - Shandong & Pingguo Aluminum Carbon Plant (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBusinessCombinationShandongPingguoAluminumCarbonPlantDetails
2779	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
2780	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
2781	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
2782	Shandong Aluminum Carbon Plant	Member			ach:ShandongAluminumCarbonPlantMember
2783	Pingguo Aluminum Carbon Plant	Member			ach:PingguoAluminumCarbonPlantMember
2784	BUSINESS COMBINATION	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
2785	Cash consideration	Concept (Monetary)	As Of	Credit	ifrs-full:CashTransferred
2786	Assets	Abstract			ifrs-full:AssetsAbstract
2787	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
2788	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:InventoryRecognisedAsOfAcquisitionDate
2789	Other current assets	Concept (Monetary)	As Of	Debit	ach:OtherCurrentAssetsRecognisedAsOfAcquisitionDate
2790	Trade and notes receivables	Concept (Monetary)	As Of	Debit	ifrs-full:FairValueOfAcquiredReceivables
2791	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
2792	Liabilities	Abstract			ifrs-full:LiabilitiesAbstract
2793	Trade and notes payables	Concept (Monetary)	As Of	Credit	ach:TradeAndNotePayablesRecognisedAsOfAcquisitionDate
2794	Contract liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:ContractLiabilities
2795	Other payables and accrued expenses	Concept (Monetary)	As Of	Credit	ach:OtherPayablesAndAccruedExpensesRecognisedAsOfAcquisitionDate
2796	Net assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
2797	Difference recognized in equity	Concept (Monetary)	As Of	Debit	ifrs-full:GoodwillRecognisedAsOfAcquisitionDate
2798	Total consideration for acquisition	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
2799	43806 - Disclosure - BUSINESS COMBINATION - Chibi Great Wall Carbon (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBusinessCombinationChibiGreatWallCarbonDetails
2800	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
2801	Counterparties [axis]	Axis			ifrs-full:CounterpartiesAxis
2802	Counterparties [member]	Member			ifrs-full:CounterpartiesMember
2803	China Great Wall Aluminum	Member			ach:ChinaGreatWallAluminumMember
2804	Henan Great Wall Zhongxin	Member			ach:HenanGreatWallZhongxinMember
2805	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
2806	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
2807	Chalco Mining	Member			ach:ChalcoMiningMember
2808	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
2809	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
2810	Red Cliff Carbon Co., Ltd	Member			ach:RedCliffCarbonCoLtdMember
2811	Red Chibi Great Wall	Member			ach:RedChibiGreatWallMember
2812	BUSINESS COMBINATION	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
2813	Equity interest acquired (as a percent)	Concept (Percent)	As Of		ifrs-full:PercentageOfVotingEquityInterestsAcquired
2814	Cash consideration	Concept (Monetary)	As Of	Credit	ifrs-full:CashTransferred
2815	Consideration transferred in receivables	Concept (Monetary)	As Of	Credit	ifrs-full:OtherTangibleOrIntangibleAssetsTransferred
2816	Cash consideration paid	Concept (Monetary)	For Period	Credit	ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
2817	Assets	Abstract			ifrs-full:AssetsAbstract
2818	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
2819	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate
2820	Deferred tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssetsRecognisedAsOfAcquisitionDate
2821	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:InventoryRecognisedAsOfAcquisitionDate
2822	Other current assets	Concept (Monetary)	As Of	Debit	ach:OtherCurrentAssetsRecognisedAsOfAcquisitionDate
2823	Trade and notes receivables	Concept (Monetary)	As Of	Debit	ifrs-full:FairValueOfAcquiredReceivables
2824	Restricted cash	Concept (Monetary)	As Of	Debit	ifrs-full:RestrictedCashAndCashEquivalents
2825	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
2826	Liabilities	Abstract			ifrs-full:LiabilitiesAbstract
2827	Interest bearing loans and borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:BorrowingsRecognisedAsOfAcquisitionDate
2828	Contract liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:ContractLiabilities
2829	Trade and notes payables	Concept (Monetary)	As Of	Credit	ach:TradeAndNotePayablesRecognisedAsOfAcquisitionDate
2830	Other payables and accrued expenses	Concept (Monetary)	As Of	Credit	ach:OtherPayablesAndAccruedExpensesRecognisedAsOfAcquisitionDate
2831	Income tax payable	Concept (Monetary)	As Of	Credit	ach:IncomeTaxPayableRecognisedAsOfAcquisitionDate
2832	Other non-current liabilities	Concept (Monetary)	As Of	Credit	ach:OtherNonCurrentLiabilitiesRecognisedAsOfAcquisitionDate
2833	Net assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
2834	Non-controlling interests	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate
2835	Difference recognized in equity	Concept (Monetary)	As Of	Debit	ifrs-full:GoodwillRecognisedAsOfAcquisitionDate
2836	Total consideration for acquisition	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
2837	43807 - Disclosure - BUSINESS COMBINATION - Longhua Logistics (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureBusinessCombinationLonghuaLogisticsDetails
2838	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
2839	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
2840	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
2841	China Aluminum Logistics Group Corporation Co., Ltd.	Member			ach:ChinaAluminumLogisticsGroupCorporationCompanyLimitedMember
2842	Associates [axis]	Axis			ifrs-full:SignificantInvestmentsInAssociatesAxis
2843	Entity's total for associates [member]	Member			ifrs-full:EntitysTotalForAssociatesMember
2844	East Light Logistics	Member			ach:EastLightLogisticsMember
2845	BUSINESS COMBINATION	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
2846	Equity interest acquired (as a percent)	Concept (Percent)	As Of		ifrs-full:PercentageOfVotingEquityInterestsAcquired
2847	Assets	Abstract			ifrs-full:AssetsAbstract
2848	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
2849	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:InventoryRecognisedAsOfAcquisitionDate
2850	Other current assets	Concept (Monetary)	As Of	Debit	ach:OtherCurrentAssetsRecognisedAsOfAcquisitionDate
2851	Trade and notes receivables	Concept (Monetary)	As Of	Debit	ifrs-full:FairValueOfAcquiredReceivables
2852	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
2853	Liabilities	Abstract			ifrs-full:LiabilitiesAbstract
2854	Trade and notes payables	Concept (Monetary)	As Of	Credit	ach:TradeAndNotePayablesRecognisedAsOfAcquisitionDate
2855	Contract liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:ContractLiabilities
2856	Income tax payable	Concept (Monetary)	As Of	Credit	ach:IncomeTaxPayableRecognisedAsOfAcquisitionDate
2857	Other payables and accrued expenses	Concept (Monetary)	As Of	Credit	ach:OtherPayablesAndAccruedExpensesRecognisedAsOfAcquisitionDate
2858	Net assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
2859	Non-controlling interests	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate
2860	Net assets acquired	Concept (Monetary)	As Of	Debit	ach:IdentifiableAssetsAcquiredLiabilitiesAssumedExcludingNonControllingInterest
2861	Difference recognized in equity	Concept (Monetary)	As Of	Debit	ifrs-full:GoodwillRecognisedAsOfAcquisitionDate
2862	Total purchase consideration	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
2863	43901 - Disclosure - DISPOSAL OF BUSINESSES (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureDisposalOfBusinessesDetails
2864	Disposal Groups Classified As Held For Sale [Table]	Table	*	*	ach:DisposalGroupsClassifiedAsHeldForSaleTable
2865	Assets and liabilities classified as held for sale [axis]	Axis			ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis
2866	Assets and liabilities not classified as held for sale [member]	Member			ifrs-full:AssetsAndLiabilitiesNotClassifiedAsHeldForSaleMember
2867	Assets and liabilities classified as held for sale	Member			ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleMember
2868	Disposal groups classified as held for sale	Member			ifrs-full:DisposalGroupsClassifiedAsHeldForSaleMember
2869	Environmental Protection Business	Member			ach:EnvironmentalProtectionBusinessDisposalGroupHeldForSaleMember
2870	Shandong Engineering	Member			ach:ChinaAluminumShandongEngineeringTechnologyCo.LtdDisposalGroupHeldForSaleMember
2871	Counterparties [axis]	Axis			ifrs-full:CounterpartiesAxis
2872	Counterparties [member]	Member			ifrs-full:CounterpartiesMember
2873	CHALIECO	Member			ach:ChinaAluminumInternationalEngineeringCo.LtdMember
2874	DISPOSAL OF BUSINESSES	LineItems			ach:DisposalGroupsClassifiedAsHeldForSaleLineItems
2875	Equity interests transferred (as a percent)	Concept (Percent)	For Period		ach:ProportionOfOwnershipInterestInSubsidiaryTransferred
2876	Ownership interest in subsidiary (in percent)	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInSubsidiary
2877	Fair value gain recognized for remaining 40% equity interest	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnSubsequentIncreaseInFairValueLessCostsToSellNotInExcessOfRecognisedCumulativeImpairmentLoss
2878	Other gains from unrealized profit arises from past services	Concept (Monetary)	For Period	Credit	ach:OtherGainsRecognisedFromReversingOfPastUnrealizedProfitsEliminatedInConsolidation
2879	Net assets disposed of:	Abstract			ach:NetAssetsDisposedOfAbstract
2880	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
2881	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
2882	Deferred tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:NetDeferredTaxAssets
2883	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
2884	Trade and notes receivables	Concept (Monetary)	As Of	Debit	ach:TradeAndNotesReceivables
2885	Other current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentAssets
2886	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
2887	Other non-current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNoncurrentLiabilities
2888	Other payables and accrued expenses	Concept (Monetary)	As Of	Credit	ifrs-full:OtherCurrentPayables
2889	Trade and notes payables	Concept (Monetary)	As Of	Credit	ach:TradeAndCurrentNotesPayables
2890	Interest-bearing loans and borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
2891	Net assets	Concept (Monetary)	As Of	Debit	ifrs-full:NetAssetsLiabilities
2892	Non-controlling interests	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
2893	Total equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
2894	Gain on disposal	Concept (Monetary)	For Period	Credit	ifrs-full:GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation
2895	The fair value of the remaining equity interest in subsidiary	Concept (Monetary)	As Of	Debit	ach:DisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsEquityInterestFairValue
2896	Consideration	Concept (Monetary)	As Of	Debit	ach:DisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsConsideration
2897	Cash consideration	Concept (Monetary)	As Of	Debit	ach:DisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsCashConsideration
2898	Notes receivable	Concept (Monetary)	As Of	Debit	ach:DisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsConsiderationAsNotesReceivable
2899	Investments in joint ventures	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod
2900	43902 - Disclosure - DISPOSAL OF BUSINESSES - Cash flows (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureDisposalOfBusinessesCashFlowsDetails
2901	Disposal Groups Classified As Held For Sale [Table]	Table	*	*	ach:DisposalGroupsClassifiedAsHeldForSaleTable
2902	Assets and liabilities classified as held for sale [axis]	Axis			ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis
2903	Assets and liabilities not classified as held for sale [member]	Member			ifrs-full:AssetsAndLiabilitiesNotClassifiedAsHeldForSaleMember
2904	Assets and liabilities classified as held for sale	Member			ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleMember
2905	Disposal groups classified as held for sale	Member			ifrs-full:DisposalGroupsClassifiedAsHeldForSaleMember
2906	Shandong Engineering	Member			ach:ChinaAluminumShandongEngineeringTechnologyCo.LtdDisposalGroupHeldForSaleMember
2907	Disposal Groups Classified As Held For Sale [Line Items]	LineItems			ach:DisposalGroupsClassifiedAsHeldForSaleLineItems
2908	Analysis of the cash flow of cash and cash equivalents	Abstract			ach:AnalysisOfCashFlowsOfCashAndCashEquivalentsAbstract
2909	Cash consideration received	Concept (Monetary)	For Period	Credit	ifrs-full:PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents
2910	Cash and bank balances disposed of	Concept (Monetary)	For Period	Debit	ifrs-full:CashAndCashEquivalentsInSubsidiaryOrBusinessesAcquiredOrDisposed2013
2911	Net inflows of cash and cash equivalents in respect of the disposal of Shanxi Huaxing	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations
2912	Net outflows of cash and cash equivalents in respect of disposal	Concept (Monetary)	For Period	Credit	ach:NetOutflowsOfCashAndCashEquivalentsInSubsidiaryOrBusinessesDisposed
2913	43903 - Disclosure - DISPOSAL OF BUSINESSES - Other disposals (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureDisposalOfBusinessesOtherDisposalsDetails
2914	Disposal Groups Classified As Held For Sale [Table]	Table	*	*	ach:DisposalGroupsClassifiedAsHeldForSaleTable
2915	Assets and liabilities classified as held for sale [axis]	Axis			ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis
2916	Assets and liabilities not classified as held for sale [member]	Member			ifrs-full:AssetsAndLiabilitiesNotClassifiedAsHeldForSaleMember
2917	Assets and liabilities classified as held for sale	Member			ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleMember
2918	Disposal groups classified as held for sale	Member			ifrs-full:DisposalGroupsClassifiedAsHeldForSaleMember
2919	Shanxi Zhongrun	Member			ach:ShanxiChinaHuarunCoLtdDisposalGroupHeldForSaleMember
2920	Zibo Trading	Member			ach:ZiboInternationalTradingCoLtdDisposalGroupHeldForSaleMember
2921	Longmen Aluminum	Member			ach:ShanxiLongmenAluminiumCo.LtdBankruptcyLiquidationMember
2922	Beijing Yike	Member			ach:BeijingYikeBankruptcyLiquidationMember
2923	Zhengzhou Chalco Longyu Mining	Member			ach:ZhengzhouChalcoLongyuMiningCoLtdMember
2924	Shanxi Huatai Carbon	Member			ach:ShanxiHuataiCarbonCoLtdMember
2925	Hedong Carbon	Member			ach:HedongCarbonCoLtdMember
2926	Counterparties [axis]	Axis			ifrs-full:CounterpartiesAxis
2927	Counterparties [member]	Member			ifrs-full:CounterpartiesMember
2928	Shanxi Zhongrun with Huarun (Coal) Group	Member			ach:ShanxiZhongrunWithHuarunCoalGroupMember
2929	Xishan Coal Electricity	Member			ach:ShanxiXishanCoalAndElectricityPowerCo.LtdMember
2930	Jin Energy Power	Member			ach:JinEnergyPowerGroupCo.LtdMember
2931	DISPOSAL OF BUSINESSES	LineItems			ach:DisposalGroupsClassifiedAsHeldForSaleLineItems
2932	Ownership interest in associate (in percent)	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInAssociate
2933	Amount of equity interest subscribed	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfInterestsInInvestmentsAccountedForUsingEquityMethod
2934	Number of other shareholders	Concept (Integer)	For Period		ach:NumberOfOtherShareholders
2935	Fair value of investment in associates	Concept (Monetary)	As Of	Debit	ifrs-full:FairValueOfInvestmentsInAssociatesWherePriceQuotationsPublished
2936	Equity interests transferred (as a percent)	Concept (Percent)	For Period		ach:ProportionOfOwnershipInterestInSubsidiaryTransferred
2937	Gain (loss) on disposal	Concept (Monetary)	For Period	Credit	ifrs-full:GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation
2938	Ownership interest in subsidiary (in percent)	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInSubsidiary
2939	The fair value of the remaining equity interest in subsidiary	Concept (Monetary)	As Of	Debit	ach:DisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsEquityInterestFairValue
2940	Fair value gain (loss) recognized for remaining equity interest	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnSubsequentIncreaseInFairValueLessCostsToSellNotInExcessOfRecognisedCumulativeImpairmentLoss
2941	44001 - Disclosure - OTHER EQUITY INSTRUMENTS (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureOtherEquityInstrumentsDetails
2942	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
2943	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
2944	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
2945	2013 Senior Perpetual Securities	Member			ach:Senior2013PerpetualSecuritiesMember
2946	2015 Perpetual Medium-term Notes	Member			ach:Perpetual2015MediumTermNotesMember
2947	2016 Senior Perpetual Securities	Member			ach:Senior2016PerpetualSecuritiesMember
2948	2018 Perpetual Medium-term Notes	Member			ach:Perpetual2018MediumTermNotesMember
2949	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2950	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
2951	Chalco Hong Kong	Member			ach:ChalcoHongKongLimitedMember
2952	Range [axis]	Axis			ifrs-full:RangeAxis
2953	Ranges [member]	Member			ifrs-full:RangesMember
2954	Maximum	Member			ifrs-full:TopOfRangeMember
2955	OTHER EQUITY INSTRUMENTS	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
2956	Notional amount	Concept (Monetary)	As Of		ifrs-full:NotionalAmount
2957	Interest rate (as a percent)	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
2958	Proceeds from issuance of the Senior Perpetual Securities after the issuance costs	Concept (Monetary)	For Period	Debit	ach:ProceedsFromIssueOfSeniorPerpetualSecurities
2959	Proceeds from Medium-term Notes	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromIssuingOtherEquityInstruments
2960	Initial spread (as a percent)	Concept (Percent)	As Of		ach:OtherEquityInstrumentsBasisSpread
2961	Margin rate (as a percent)	Concept (Percent)	As Of		ach:OtherEquityInstrumentsMarginRate
2962	Margin rate term (in years)	Concept (xbrli:durationItemType)	For Period		ach:OtherEquityInstrumentsTermForMarginRate
2963	Repayments of borrowings in principal and interest	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
2964	44201 - Disclosure - COMMITMENTS (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureCommitmentsDetails
2965	Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [table]	Table	*	*	ifrs-full:DisclosureOfAmountsToBeRecoveredOrSettledAfterTwelveMonthsForClassesOfAssetsAndLiabilitiesThatContainAmountsToBeRecoveredOrSettledBothNoMoreAndMoreThanTwelveMonthsAfterReportingDateTable
2966	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2967	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2968	Associates	Member			ifrs-full:AssociatesMember
2969	Joint ventures	Member			ifrs-full:JointVenturesWhereEntityIsVenturerMember
2970	Maturity [axis]	Axis			ifrs-full:MaturityAxis
2971	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
2972	Within 1 year	Member			ifrs-full:NotLaterThanOneYearMember
2973	In the second to fifth years, inclusive	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
2974	After 5 years	Member			ifrs-full:LaterThanFiveYearsMember
2975	COMMITMENTS	LineItems			ifrs-full:DisclosureOfAmountsToBeRecoveredOrSettledAfterTwelveMonthsForClassesOfAssetsAndLiabilitiesThatContainAmountsToBeRecoveredOrSettledBothNoMoreAndMoreThanTwelveMonthsAfterReportingDateLineItems
2976	Capital commitments on property, plant and equipment	Abstract			ifrs-full:CapitalCommitmentsAbstract
2977	Contracted, but not provided for	Concept (Monetary)	As Of	Credit	ifrs-full:ContractualCapitalCommitments
2978	Commitments under operating leases	Abstract			ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeAbstract
2979	Total commitments under operating leases	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
2980	Other capital commitments	Abstract			ach:OtherCapitalCommitmentsAbstract
2981	Commitments to make capital contributions	Concept (Monetary)	As Of	Credit	ifrs-full:CapitalCommitments
2982	44301 - Disclosure - EVENTS AFTER THE REPORTING PERIOD (Details)	Network	*	*	http://www.chalco.com.cn/role/DisclosureEventsAfterReportingPeriodDetails
2983	Disclosure of non-adjusting events after reporting period [table]	Table	*	*	ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable
2984	Non-adjusting events after reporting period [axis]	Axis			ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
2985	Non-adjusting events after reporting period [member]	Member			ifrs-full:NonadjustingEventsMember
2986	Issuance of short-term bonds	Member			ach:IssuanceOfShortTermBondsMember
2987	Issuance of medium term notes	Member			ach:IssuanceOfMediumTermNotesMember
2988	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
2989	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
2990	Short-term bonds	Member			ach:ShortTermBondsMember
2991	2022 corporate 3.80% bond	Member			ach:CorporateBonds3.80PercentDueIn2022Member
2992	EVENTS AFTER THE REPORTING PERIOD	LineItems			ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
2993	Face value	Concept (Monetary)	As Of		ifrs-full:NotionalAmount
2994	Par value (RMB per unit)	Concept (Share)	As Of		ach:ParValuePerBond
2995	Interest rate (as a percent)	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate