AU OPTRONICS CORP (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line	Label	Object Class	Period Type	Balance	Report ElementName
1	1001 - Document - Document and Entity Information	Network	*	*	http://auo.com/role/DocumentAndEntityInformation
2	Implied Table	Table	*	*	implied:Table
3	Document and Entity Information [Abstract]	Abstract			auo:DocumentAndEntityInformationAbstract
4	Document Type	Concept (Submission Type)	For Period		dei:DocumentType
5	Amendment Flag	Concept (Yes/No)	For Period		dei:AmendmentFlag
6	Document Period End Date	Concept (Date)	For Period		dei:DocumentPeriodEndDate
7	Document Fiscal Year Focus	Concept (Year)	For Period		dei:DocumentFiscalYearFocus
8	Document Fiscal Period Focus	Concept (Fiscal Period)	For Period		dei:DocumentFiscalPeriodFocus
9	Entity Registrant Name	Concept (Text/String)	For Period		dei:EntityRegistrantName
10	Entity Central Index Key	Concept (CIK Number)	For Period		dei:EntityCentralIndexKey
11	Current Fiscal Year End Date	Concept (Month/Day)	For Period		dei:CurrentFiscalYearEndDate
12	Entity Well-known Seasoned Issuer	Concept (Yes/No)	For Period		dei:EntityWellKnownSeasonedIssuer
13	Entity Voluntary Filers	Concept (Yes/No)	For Period		dei:EntityVoluntaryFilers
14	Entity Current Reporting Status	Concept (Yes/No)	For Period		dei:EntityCurrentReportingStatus
15	Entity Filer Category	Concept (Filer Category)	For Period		dei:EntityFilerCategory
16	Trading Symbol	Concept (Text/String)	For Period		dei:TradingSymbol
17	Entity Common Stock, Shares Outstanding	Concept (Shares)	As Of		dei:EntityCommonStockSharesOutstanding
18	1002 - Statement - Consolidated Statements of Financial Position	Network	*	*	http://auo.com/role/ConsolidatedStatementsOfFinancialPosition
19	Implied Table	Table	*	*	implied:Table
20	Statement of financial position [abstract]	Abstract			ifrs-full:StatementOfFinancialPositionAbstract
21	Assets	Abstract			ifrs-full:AssetsAbstract
22	Current assets:	Abstract			ifrs-full:CurrentAssetsAbstract
23	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
24	Financial assets at fair value through profit or loss-current	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentFinancialAssetsAtFairValueThroughProfitOrLoss
25	Accounts receivable, net	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
26	Accounts receivable from related parties, net	Concept (Monetary)	As Of	Debit	auo:CurrentAccountsReceivablesDueFromRelatedParties
27	Other receivables from related parties	Concept (Monetary)	As Of	Debit	ifrs-full:TradeAndOtherReceivablesDueFromRelatedParties
28	Current tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTaxAssetsCurrent
29	Inventories	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
30	Other current financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentFinancialAssets
31	Noncurrent assets held for sale	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSale
32	Other current assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentAssets
33	Total current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
34	Noncurrent assets:	Abstract			ifrs-full:NoncurrentAssetsAbstract
35	Financial assets at fair value through other comprehensive income-noncurrent	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome
36	Available-for-sale financial assets-noncurrent	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentFinancialAssetsAvailableforsale
37	Investments in equity-accounted investees	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentAccountedForUsingEquityMethod
38	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
39	Investment property	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentProperty
40	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsOtherThanGoodwill
41	Deferred tax assets	Concept (Monetary)	As Of	Debit	ifrs-full:DeferredTaxAssets
42	Other noncurrent assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentAssets
43	Total noncurrent assets	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentAssets
44	Total Assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
45	Liabilities	Abstract			ifrs-full:LiabilitiesAbstract
46	Current liabilities:	Abstract			ifrs-full:CurrentLiabilitiesAbstract
47	Short-term borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:ShorttermBorrowings
48	Current installments of long-term borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentPortionOfLongtermBorrowings
49	Financial liabilities at fair value through profit or loss-current	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentFinancialLiabilitiesAtFairValueThroughProfitOrLoss
50	Accounts payable	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
51	Accounts payable to related parties	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties
52	Equipment and construction payable	Concept (Monetary)	As Of	Credit	ifrs-full:OtherCurrentPayables
53	Other payables to related parties	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayablesToRelatedParties
54	Current tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentTaxLiabilitiesCurrent
55	Provisions-current	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentProvisions
56	Other current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherCurrentLiabilities
57	Total current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
58	Noncurrent liabilities:	Abstract			ifrs-full:NoncurrentLiabilitiesAbstract
59	Long-term borrowings, excluding current installments	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
60	Provisions-noncurrent	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentProvisions
61	Deferred tax liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
62	Other noncurrent liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherNoncurrentLiabilities
63	Total noncurrent liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentLiabilities
64	Total liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
65	Equity	Abstract			ifrs-full:EquityAbstract
66	Common stock, $10 par value	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
67	Capital surplus	Concept (Monetary)	As Of	Credit	ifrs-full:CapitalReserve
68	Retained earnings	Concept (Monetary)	As Of	Credit	ifrs-full:RetainedEarnings
69	Other components of equity	Concept (Monetary)	As Of	Credit	ifrs-full:OtherEquityInterest
70	Equity attributable to shareholders of AU Optronics Corp.	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAttributableToOwnersOfParent
71	Non-controlling interests	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
72	Total equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
73	Total Liabilities and Equity	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAndLiabilities
74	1003 - Statement - Consolidated Statements of Financial Position (Parenthetical)	Network	*	*	http://auo.com/role/ConsolidatedStatementsOfFinancialPositionParenthetical
75	Implied Table	Table	*	*	implied:Table
76	Statement of financial position [abstract]	Abstract			ifrs-full:StatementOfFinancialPositionAbstract
77	Par value per share	Concept (Share)	As Of		ifrs-full:ParValuePerShare
78	1004 - Statement - Consolidated Statements of Comprehensive Income	Network	*	*	http://auo.com/role/ConsolidatedStatementsOfComprehensiveIncome
79	Implied Table	Table	*	*	implied:Table
80	Statement of comprehensive income [abstract]	Abstract			ifrs-full:StatementOfComprehensiveIncomeAbstract
81	Net revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
82	Cost of sales	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfSales
83	Gross profit	Concept (Monetary)	For Period	Credit	ifrs-full:GrossProfit
84	Selling and distribution expenses	Concept (Monetary)	For Period	Debit	ifrs-full:DistributionAndAdministrativeExpense
85	General and administrative expenses	Concept (Monetary)	For Period	Debit	ifrs-full:SellingGeneralAndAdministrativeExpense
86	Research and development expenses	Concept (Monetary)	For Period	Debit	ifrs-full:ResearchAndDevelopmentExpense
87	Other income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherIncome
88	Other gains and losses	Concept (Monetary)	For Period	Credit	ifrs-full:OtherGainsLosses
89	Finance costs	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
90	Share of profit of equity-accounted investees	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
91	Profit before income tax	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
92	Income tax expense (benefit)	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
93	Profit for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
94	Other comprehensive income (loss)	Abstract			ifrs-full:OtherComprehensiveIncomeAbstract
95	Items that will never be reclassified to profit or loss	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
96	Remeasurement of defined benefit obligations	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
97	Unrealized loss on equity investments at fair value through other comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesFromInvestmentsInEquityInstruments
98	Equity-accounted investees � share of other comprehensive income (loss)	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossBeforeTax
99	Related tax	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss
100	Other comprehensive income that will not be reclassified to profit or loss, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax
101	Items that are or may be reclassified subsequently to profit or loss	Abstract			ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
102	Foreign operations � foreign currency translation differences	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation
103	Net change in fair value of available-for-sale financial assets	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxAvailableforsaleFinancialAssets
104	Effective portion of changes in fair value of cash flow hedges	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeBeforeTaxCashFlowHedges
105	Equity-accounted investees � share of other comprehensive loss	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossBeforeTax
106	Related tax	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss
107	Other comprehensive income that will be reclassified to profit or loss, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax
108	Other comprehensive income (loss), net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
109	Total comprehensive income for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
110	Profit (loss) attributable to:	Abstract			ifrs-full:ProfitLossAttributableToAbstract
111	Shareholders of AU Optronics Corp.	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOwnersOfParent
112	Non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToNoncontrollingInterests
113	Profit for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
114	Total comprehensive income (loss) attributable to:	Abstract			ifrs-full:ComprehensiveIncomeAttributableToAbstract
115	Shareholders of AU Optronics Corp.	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
116	Non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
117	Total comprehensive income for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
118	Earnings per share	Abstract			ifrs-full:EarningsPerShareAbstract
119	Basic earnings per share (in dollars per share)	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
120	Diluted earnings per share (in dollars per share)	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShare
121	1005 - Statement - Consolidated Statements of Changes in Equity	Network	*	*	http://auo.com/role/ConsolidatedStatementsOfChangesInEquity
122	Statement [Table]	Table	*	*	us-gaap:StatementTable
123	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
124	Equity [Member]	Member			ifrs-full:EquityMember
125	Capital surplus [member]	Member			ifrs-full:SharePremiumMember
126	Legal reserve [member]	Member			ifrs-full:StatutoryReserveMember
127	Unappropriated earnings (deficit) [member]	Member			ifrs-full:CapitalReserveMember
128	Subtotal [member]	Member			ifrs-full:RetainedEarningsMember
129	Cumulative translation differences [member]	Member			ifrs-full:ReserveOfChangeInValueOfForeignCurrencyBasisSpreadsMember
130	Unrealized gains (losses) on available-for-sale financial assets [member]	Member			ifrs-full:ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssetsMember
131	Unrealized gains (losses) on cash flow hedges [member]	Member			ifrs-full:ReserveOfGainsAndLossesOnHedgingInstrumentsThatHedgeInvestmentsInEquityInstrumentsMember
132	Subtotal [member]	Member			auo:OtherComponentsOfEquitiesMember
133	Equity attributable to shareholders of AU Optronics Corp. [member]	Member			ifrs-full:EquityAttributableToOwnersOfParentMember
134	Non-controlling interests [member]	Member			ifrs-full:NoncontrollingInterestsMember
135	Common stock [member]	Member			auo:CommonStock1Member
136	Unrealized gains (losses) on financial assets at fair value through other comprehensive income [Member]	Member			auo:UnrealizedGainslossesonFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeMemberMember
137	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
138	Currently stated [member]	Member			ifrs-full:RestatedMember
139	Adjusted [Member]	Member			ifrs-full:FinancialEffectOfChangesInAccountingPolicyMember
140	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
141	Beginning Balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
142	Adjustments on initial application of new standards	Concept (Monetary)	As Of	Credit	auo:NewAccountingPronouncementOrChangesInAccountingPrinciplesCumulativeEffectOfAdoptionQuantification
143	Adjusted balance at January 1, 2018	Concept (Monetary)	As Of	Credit	auo:EquityAdjustedBalance
144	Appropriation of earnings	Abstract			auo:AppropriationOfEarningsAbstract
145	Legal reserve	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughTransferToStatutoryReserve
146	Cash dividends distributed to shareholders	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsPaid
147	Profit (loss) for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
148	Other comprehensive income, net of tax	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncome
149	Total comprehensive income for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ComprehensiveIncome
150	Deemed contributions from shareholders	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughTransactionsWithOwners
151	Adjustments to capital surplus and accumulated deficit for changes in investees' equity	Concept (Monetary)	For Period	Credit	auo:IncreaseDecreaseThroughChangeInAssociatesAndJointVenture
152	Differences between consideration and carrying amount arising from disposal of interest in subsidiary	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughDisposalOfSubsidiary
153	Group reorganization	Concept (Monetary)	For Period	Credit	auo:IncreaseDecreaseInEquityResultingFromGroupReorganization
154	Disposal of equity investments at fair value through other comprehensive income	Concept (Monetary)	For Period	Debit	ifrs-full:AmountsRemovedFromEquityAndAdjustedAgainstFairValueOfFinancialAssetsOnReclassificationOutOfFairValueThroughOtherComprehensiveIncomeMeasurementCategoryBeforeTax
155	Changes in non-controlling interests	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangeInEquityOfSubsidiaries
156	Ending Balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
157	1006 - Statement - Consolidated Statements of Cash Flows	Network	*	*	http://auo.com/role/ConsolidatedStatementsOfCashFlows
158	Implied Table	Table	*	*	implied:Table
159	Statement of Cash Flows [Abstract]	Abstract			ifrs-full:StatementOfCashFlowsAbstract
160	Cash flows from operating activities:	Abstract			ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
161	Profit before income tax	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
162	Adjustments for:	Abstract			ifrs-full:AdjustmentsForReconcileProfitLossAbstract
163	- depreciation	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationExpense
164	- amortization	Concept (Monetary)	For Period	Debit	ifrs-full:AmortisationExpense
165	- loss (gain) on financial instruments at fair value through profit or loss	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForFairValueGainsLosses
166	- interest expense	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForInterestExpense
167	- interest income	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForInterestIncome
168	- dividend income	Concept (Monetary)	For Period	Credit	ifrs-full:AdjustmentsForDividendIncome
169	- share of profit of equity-accounted investees	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
170	- gains on disposals of property, plant and equipment, net	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnDisposalsOfPropertyPlantAndEquipment
171	- losses (gains) on disposals of investments and financial assets, net	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnDisposalsOfInvestments
172	- write-downs of inventories	Concept (Monetary)	For Period	Debit	auo:InventoryWritedowns
173	- impairment losses on assets	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLoss
174	- unrealized foreign currency exchange losses (gains)	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains
175	- others	Concept (Monetary)	For Period	Debit	ifrs-full:OtherAdjustmentsToReconcileProfitLoss
176	Change in operating assets and liabilities:	Abstract			ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPositionAbstract
177	- accounts receivable	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
178	- receivables from related parties	Concept (Monetary)	For Period	Debit	auo:AdjustmentsForDecreaseIncreaseInReceivablesFromRelatedParties
179	- inventories	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossInventories
180	- other current assets	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInOtherCurrentAssets
181	- accounts payable	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables
182	- payables to related parties	Concept (Monetary)	For Period	Debit	auo:AdjustmentsForDecreaseIncreaseInPayableToRelatedParties
183	- net defined benefit liability	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities
184	- provisions	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseInOtherProvisionsArisingFromPassageOfTime
185	- other current liabilities	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInOtherCurrentLiabilities
186	Cash generated from operations	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperations
187	Cash received from interest income	Concept (Monetary)	For Period	Debit	ifrs-full:InterestReceivedClassifiedAsOperatingActivities
188	Cash received from dividends	Concept (Monetary)	For Period	Debit	ifrs-full:DividendsReceivedClassifiedAsOperatingActivities
189	Cash paid for interest	Concept (Monetary)	For Period	Credit	ifrs-full:InterestPaidClassifiedAsOperatingActivities
190	Cash paid for income taxes	Concept (Monetary)	For Period	Credit	ifrs-full:IncomeTaxesPaidClassifiedAsOperatingActivities
191	Net cash provided by operating activities	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperatingActivities
192	Cash flows from investing activities:	Abstract			ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
193	Acquisitions of financial assets at fair value through profit or loss	Concept (Monetary)	For Period	Credit	auo:PurchaseOfFinancialAssetsMeasuredAtFairValueThroughProfitOrLoss
194	Disposals of financial assets at fair value through profit or loss	Concept (Monetary)	For Period	Debit	auo:SaleOfFinancialAssetsMeasuredAtFairValueThroughProfitOrLoss
195	Acquisitions of financial assets at fair value through other comprehensive income	Concept (Monetary)	For Period	Credit	auo:PurchaseOfFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome
196	Proceeds from disposals of financial assets at fair value through other comprehensive income	Concept (Monetary)	For Period	Debit	auo:ProceedsFromSaleOfFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome
197	Acquisitions of available-for-sale financial assets	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfAvailableforsaleFinancialAssets
198	Proceeds from disposals of available-for-sale financial assets	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromDisposalOrMaturityOfAvailableforsaleFinancialAssets
199	Proceeds from return of capital by available-for-sale financial assets	Concept (Monetary)	For Period	Debit	auo:ProceedsFromReturnOfCapitalByAvailableforsaleFinancialAssets
200	Acquisitions of equity-accounted investees	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfInterestsInInvestmentsAccountedForUsingEquityMethod
201	Proceeds from disposals of equity-accounted investees	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod
202	Proceeds from return of capital by equity-accounted investees	Concept (Monetary)	For Period	Debit	auo:ProceedsFromReturnOfCapitalFromInvestmentsAccountedForUsingEquityMethod
203	Net cash outflow arising from acquisition of subsidiaries	Concept (Monetary)	For Period	Credit	ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
204	Net cash inflows resulting from disposals of subsidiaries	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
205	Acquisitions of property, plant and equipment	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
206	Proceeds from disposals of property, plant and equipment	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
207	Increase in refundable deposits	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments
208	Increase in intangible assets	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities
209	Increase in other financial assets	Concept (Monetary)	For Period	Debit	ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities
210	Net cash used in investing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivities
211	Cash flows from financing activities:	Abstract			ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
212	Proceeds from short-term borrowings	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromCurrentBorrowings
213	Repayments of short-term borrowings	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfCurrentBorrowings
214	Proceeds from long-term borrowings	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromNoncurrentBorrowings
215	Repayments of long-term borrowings	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfNoncurrentBorrowings
216	Guarantee deposits refunded	Concept (Monetary)	For Period	Credit	auo:OtherOutflowsOfCashClassifiedAsFinancingActivities
217	Cash dividends	Concept (Monetary)	For Period	Credit	ifrs-full:DividendsPaidClassifiedAsFinancingActivities
218	Net change of non-controlling interests and others	Concept (Monetary)	For Period	Credit	auo:NetChangeOfNocontrollingInterestAndOthers
219	Net cash provided by (used in) financing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivities
220	Effect of exchange rate change on cash and cash equivalents	Concept (Monetary)	For Period	Debit	ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
221	Net increase (decrease) in cash and cash equivalents	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
222	Cash and cash equivalents at January 1	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
223	Cash and cash equivalents at December 31	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
224	1007 - Disclosure - Organization	Network	*	*	http://auo.com/role/Organization
225	Implied Table	Table	*	*	implied:Table
226	Disclosure Of Organization Explanatory [Abstract]	Abstract			auo:DisclosureOfOrganizationExplanatoryAbstract
227	Disclosure of notes and other explanatory information [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfNotesAndOtherExplanatoryInformationExplanatory
228	1008 - Disclosure - The Authorization of Financial Statements	Network	*	*	http://auo.com/role/TheAuthorizationOfFinancialStatements
229	Implied Table	Table	*	*	implied:Table
230	Disclosure of authorisation of financial statements [Abstract]	Abstract			auo:DisclosureOfAuthorisationOfFinancialStatementsAbstract
231	Disclosure of authorisation of financial statements [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAuthorisationOfFinancialStatementsExplanatory
232	1009 - Disclosure - Application of New and Revised Standards, Amendments and Interpretations	Network	*	*	http://auo.com/role/ApplicationOfNewAndRevisedStandardsAmendmentsAndInterpretations
233	Implied Table	Table	*	*	implied:Table
234	Disclosure of expected impact of initial application of new standards or interpretations [abstract]	Abstract			ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsAbstract
235	Disclosure of expected impact of initial application of new standards or interpretations [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations
236	1010 - Disclosure - Changes in Significant Accounting Policies	Network	*	*	http://auo.com/role/ChangesInSignificantAccountingPolicies
237	Implied Table	Table	*	*	implied:Table
238	Changes in Accounting Policies Abstract [Abstract]	Abstract			auo:ChangesInAccountingPoliciesAbstractAbstract
239	Disclosure of changes in accounting policies [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfChangesInAccountingPoliciesExplanatory
240	1011 - Disclosure - Summary of Significant Accounting Policies	Network	*	*	http://auo.com/role/SummaryOfSignificantAccountingPolicies
241	Implied Table	Table	*	*	implied:Table
242	Disclosure of significant accounting policies [Abstract]	Abstract			auo:DisclosureOfSignificantAccountingPoliciesAbstract
243	Disclosure of significant accounting policies [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
244	1012 - Disclosure - Use of Judgments and Estimates	Network	*	*	http://auo.com/role/UseOfJudgmentsAndEstimates
245	Implied Table	Table	*	*	implied:Table
246	Disclosure of changes in accounting estimates [abstract]	Abstract			ifrs-full:DisclosureOfChangesInAccountingEstimatesAbstract
247	Disclosure of accounting judgements and estimates [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAccountingJudgementsAndEstimatesExplanatory
248	1013 - Disclosure - Cash and Cash Equivalents	Network	*	*	http://auo.com/role/CashAndCashEquivalents
249	Implied Table	Table	*	*	implied:Table
250	Disclosure of cash and cash equivalents [Abstract]	Abstract			auo:DisclosureOfCashAndCashEquivalentsAbstract
251	Disclosure of cash and cash equivalents [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
252	1014 - Disclosure - Financial Assets and Liabilities at Fair Value through Profit or Loss	Network	*	*	http://auo.com/role/FinancialAssetsAndLiabilitiesAtFairValueThroughProfitOrLoss
253	Implied Table	Table	*	*	implied:Table
254	Financial Assets and Liabilities Measured at Fair Value Through Profit or Loss [Abstract]	Abstract			auo:FinancialAssetsAndLiabilitiesMeasuredAtFairValueThroughProfitOrLossAbstract
255	Disclosure of financial instruments at fair value through profit or loss [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialInstrumentsAtFairValueThroughProfitOrLossExplanatory
256	1015 - Disclosure - Financial Assets at Fair Value through Other Comprehensive Income	Network	*	*	http://auo.com/role/FinancialAssetsAtFairValueThroughOtherComprehensiveIncome
257	Implied Table	Table	*	*	implied:Table
258	Disclosure Of Financial Assets at Fair Value Through Other Comprehensive Income [Abstract]	Abstract			auo:DisclosureOfFinancialAssetsAtFairValueThroughOtherComprehensiveIncomeAbstract
259	Disclosure Of Financial Assets At Fair Value Through Other Comprehensive Income [text Block]	Concept (Text Block (HTML))	For Period		auo:DisclosureOfFinancialAssetsAtFairValueThroughOtherComprehensiveIncomeTextBlock
260	1016 - Disclosure - Available-for-sale Financial Assets-noncurrent	Network	*	*	http://auo.com/role/AvailableForSaleFinancialAssetsNoncurrent
261	Implied Table	Table	*	*	implied:Table
262	Disclosure of available-for-sale financial assets [Abstract]	Abstract			auo:DisclosureOfAvailableforsaleFinancialAssetsAbstract
263	Disclosure of available-for-sale financial assets [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAvailableforsaleAssetsExplanatory
264	1017 - Disclosure - Accounts Receivable, net (Including Related and Unrelated Parties)	Network	*	*	http://auo.com/role/AccountsReceivableNetIncludingRelatedAndUnrelatedParties
265	Implied Table	Table	*	*	implied:Table
266	Disclosure of Notes and Accounts Receivable [Abstract]	Abstract			auo:DisclosureOfNotesAndAccountsReceivableAbstract
267	Disclosure of trade and other receivables [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
268	1018 - Disclosure - Inventories	Network	*	*	http://auo.com/role/Inventories
269	Implied Table	Table	*	*	implied:Table
270	Disclosure of Inventories [Abstract]	Abstract			auo:DisclosureOfInventoriesAbstract
271	Disclosure of inventories [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInventoriesExplanatory
272	1019 - Disclosure - Noncurrent Assets Held for Sale	Network	*	*	http://auo.com/role/NoncurrentAssetsHeldForSale
273	Implied Table	Table	*	*	implied:Table
274	Disclosure Of Noncurrent Assets Held For Sale [Abstract]	Abstract			auo:DisclosureOfNoncurrentAssetsHeldForSaleAbstract
275	Disclosure Of Noncurrent Assets Held for Sale [text block]	Concept (Text Block (HTML))	For Period		auo:DisclosureOfNoncurrentAssetsHeldForSaleTextBlock
276	1020 - Disclosure - Investments in equity-accounted Investees	Network	*	*	http://auo.com/role/InvestmentsInEquityAccountedInvestees
277	Implied Table	Table	*	*	implied:Table
278	Disclosure of Investments in equity-accounted Investees [Abstract]	Abstract			auo:DisclosureOfInvestmentsInEquityaccountedInvesteesAbstract
279	Disclosure of investments accounted for using equity method [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory
280	1021 - Disclosure - Acquisition of Subsidiaries	Network	*	*	http://auo.com/role/AcquisitionOfSubsidiaries
281	Implied Table	Table	*	*	implied:Table
282	Disclosure Of Acquisitions Of Subsidiaries [Abstract]	Abstract			auo:DisclosureOfAcquisitionsOfSubsidiariesAbstract
283	Disclosure of Acquisition of Subsidiaries	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBusinessCombinationsExplanatory
284	1022 - Disclosure - Disposal of Part of Ownership Interest in Subsidiary without Losing Control	Network	*	*	http://auo.com/role/DisposalOfPartOfOwnershipInterestInSubsidiaryWithoutLosingControl
285	Implied Table	Table	*	*	implied:Table
286	Disclosure Of Disposal of Part of Ownership Interest in Subsidiary without Losing Control [Abstract]	Abstract			auo:DisclosureOfDisposalOfPartOfOwnershipInterestInSubsidiaryWithoutLosingControlAbstract
287	Disclosure of effects of changes in parent's ownership interest in subsidiary that do not result in loss of control on equity attributable to owners of parent [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEffectsOfChangesInParentsOwnershipInterestInSubsidiaryThatDoNotResultInLossOfControlOnEquityAttributableToOwnersOfParentExplanatory
288	1023 - Disclosure - Disposal of Subsidiaries	Network	*	*	http://auo.com/role/DisposalOfSubsidiaries
289	Implied Table	Table	*	*	implied:Table
290	Disclosure Of Disposal of Subsidiaries [Abstract]	Abstract			auo:DisclosureOfDisposalOfSubsidiariesAbstract
291	Disclosure Of Loss Control Of Subsidiary [text block]	Concept (Text Block (HTML))	For Period		auo:DisclosureOfLossControlOfSubsidiaryTextBlock
292	1024 - Disclosure - Property, Plant and Equipment	Network	*	*	http://auo.com/role/PropertyPlantAndEquipment
293	Implied Table	Table	*	*	implied:Table
294	Disclosure of detailed information about property, plant and equipment [abstract]	Abstract			ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
295	Disclosure of property, plant and equipment [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
296	1025 - Disclosure - Investment Property	Network	*	*	http://auo.com/role/InvestmentProperty
297	Implied Table	Table	*	*	implied:Table
298	Disclosure of detailed information about investment property [abstract]	Abstract			ifrs-full:DisclosureOfInvestmentPropertyAbstract
299	Disclosure of investment property [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInvestmentPropertyExplanatory
300	1026 - Disclosure - Intangible Assets	Network	*	*	http://auo.com/role/IntangibleAssets
301	Implied Table	Table	*	*	implied:Table
302	Disclosure of detailed information about intangible assets [abstract]	Abstract			ifrs-full:DisclosureOfIntangibleAssetsAbstract
303	Disclosure of intangible assets [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIntangibleAssetsExplanatory
304	1027 - Disclosure - Other Current Assets and Other Noncurrent Assets	Network	*	*	http://auo.com/role/OtherCurrentAssetsAndOtherNoncurrentAssets
305	Implied Table	Table	*	*	implied:Table
306	Disclosure of Other Current Assets And Other Noncurrent Assets [Abstract]	Abstract			auo:DisclosureOfOtherCurrentAssetsAndOtherNoncurrentAssetsAbstract
307	Disclosure of other assets [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherAssetsExplanatory
308	1028 - Disclosure - Short-term Borrowings	Network	*	*	http://auo.com/role/ShortTermBorrowings
309	Implied Table	Table	*	*	implied:Table
310	Disclosure of Short term Borrowings [Abstract]	Abstract			auo:DisclosureOfShortTermBorrowingsAbstract
311	Disclosure of other current liabilities [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherCurrentLiabilitiesExplanatory
312	1029 - Disclosure - Long-term Borrowings	Network	*	*	http://auo.com/role/LongTermBorrowings
313	Implied Table	Table	*	*	implied:Table
314	Disclosure Of Long Term [Abstract]	Abstract			auo:DisclosureOfLongTermAbstract
315	Disclosure of other non-current liabilities [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherNoncurrentLiabilitiesExplanatory
316	1030 - Disclosure - Provisions	Network	*	*	http://auo.com/role/Provisions
317	Implied Table	Table	*	*	implied:Table
318	Disclosure Of Provisions [Abstract]	Abstract			auo:DisclosureOfProvisionsAbstract
319	Disclosure of other provisions [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOtherProvisionsExplanatory
320	1031 - Disclosure - Operating Leases	Network	*	*	http://auo.com/role/OperatingLeases
321	Implied Table	Table	*	*	implied:Table
322	Disclosure Of Operating Leases [Abstract]	Abstract			auo:DisclosureOfOperatingLeasesAbstract
323	Disclosure of leases [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfLeasesExplanatory
324	1032 - Disclosure - Employee Benefits	Network	*	*	http://auo.com/role/EmployeeBenefits
325	Implied Table	Table	*	*	implied:Table
326	Disclosure of Employee Benefits [Abstract]	Abstract			auo:DisclosureOfEmployeeBenefitsAbstract
327	Disclosure of employee benefits [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
328	1033 - Disclosure - Capital and Other Components of Equity	Network	*	*	http://auo.com/role/CapitalAndOtherComponentsOfEquity
329	Implied Table	Table	*	*	implied:Table
330	Disclosure of Capital and Other Components of Equity [Abstract]	Abstract			auo:DisclosureOfCapitalAndOtherComponentsOfEquityAbstract
331	Disclosure of share capital, reserves and other equity interest [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
332	1034 - Disclosure - Share-based Payments	Network	*	*	http://auo.com/role/ShareBasedPayments
333	Implied Table	Table	*	*	implied:Table
334	Disclosure of Share-based Payments [Abstract]	Abstract			auo:DisclosureOfSharebasedPaymentsAbstract
335	Disclosure of share-based payment arrangements [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory
336	1035 - Disclosure - Revenue from Contracts with Customers	Network	*	*	http://auo.com/role/RevenueFromContractsWithCustomers
337	Implied Table	Table	*	*	implied:Table
338	Disclosure Of Revenue from Contracts with Customers [Abstract]	Abstract			auo:DisclosureOfRevenueFromContractsWithCustomersAbstract
339	Disclosure of revenue from contracts with customers [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRevenueFromContractsWithCustomersExplanatory
340	1036 - Disclosure - Revenue	Network	*	*	http://auo.com/role/Revenue
341	Implied Table	Table	*	*	implied:Table
342	Disclosure of Revenue [Abstract]	Abstract			auo:DisclosureOfRevenueAbstract
343	Disclosure of revenue [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRevenueExplanatory
344	1037 - Disclosure - Remuneration to Employees and Directors	Network	*	*	http://auo.com/role/RemunerationToEmployeesAndDirectors
345	Implied Table	Table	*	*	implied:Table
346	Disclosure of Remuneration to Employees and Directors [Abstract]	Abstract			auo:DisclosureOfRemunerationToEmployeesAndDirectorsAbstract
347	Disclosure of information about employees [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInformationAboutEmployeesExplanatory
348	1038 - Disclosure - The Nature of Expenses	Network	*	*	http://auo.com/role/TheNatureOfExpenses
349	Implied Table	Table	*	*	implied:Table
350	Disclosure of Expenses By Nature Explanatory [Abstract]	Abstract			auo:DisclosureOfExpensesByNatureExplanatoryAbstract
351	Disclosure of expenses by nature [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfExpensesByNatureExplanatory
352	1039 - Disclosure - Other Income	Network	*	*	http://auo.com/role/OtherIncome
353	Implied Table	Table	*	*	implied:Table
354	Disclosure of other income explanatory [Abstract]	Abstract			auo:DisclosureOfOtherIncomeExplanatoryAbstract
355	Disclosure of other income [text block]	Concept (Text Block (HTML))	For Period		auo:DisclosureOfOtherIncomeTextBlock
356	1040 - Disclosure - Other Gains and Losses	Network	*	*	http://auo.com/role/OtherGainsAndLosses
357	Implied Table	Table	*	*	implied:Table
358	Disclosure of other gains and losses [Abstract]	Abstract			auo:DisclosureOfOtherGainsAndLossesAbstract
359	Disclosure of other gains and losses [Text Block]	Concept (Text Block (HTML))	For Period		auo:DisclosureOfOtherGainsAndLossesTextBlock
360	1041 - Disclosure - Finance Costs	Network	*	*	http://auo.com/role/FinanceCosts
361	Implied Table	Table	*	*	implied:Table
362	Disclosure of finance cost explanatory [Abstract]	Abstract			auo:DisclosureOfFinanceCostExplanatoryAbstract
363	Disclosure of finance cost [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinanceCostExplanatory
364	1042 - Disclosure - Income Taxes	Network	*	*	http://auo.com/role/IncomeTaxes
365	Implied Table	Table	*	*	implied:Table
366	Disclosure of income tax explanatory [Abstract]	Abstract			auo:DisclosureOfIncomeTaxExplanatoryAbstract
367	Disclosure of income tax [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIncomeTaxExplanatory
368	1043 - Disclosure - Earnings per Share	Network	*	*	http://auo.com/role/EarningsPerShare
369	Implied Table	Table	*	*	implied:Table
370	Disclosure of Earnings per Share [Abstract]	Abstract			auo:DisclosureOfEarningsPerShareAbstract
371	Disclosure of Earnings Per Share	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEarningsPerShareExplanatory
372	1044 - Disclosure - Financial Instruments	Network	*	*	http://auo.com/role/FinancialInstruments
373	Implied Table	Table	*	*	implied:Table
374	Disclosure of financial instrument [Abstract]	Abstract			auo:DisclosureOfFinancialInstrumentAbstract
375	Disclosure of financial instruments [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
376	1045 - Disclosure - Financial Risk Management	Network	*	*	http://auo.com/role/FinancialRiskManagement
377	Implied Table	Table	*	*	implied:Table
378	Disclosure of Financial Risk Management Explanatory [Abstract]	Abstract			auo:DisclosureOfFinancialRiskManagementExplanatoryAbstract
379	Disclosure of financial risk management [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialRiskManagementExplanatory
380	1046 - Disclosure - Capital Management	Network	*	*	http://auo.com/role/CapitalManagement
381	Implied Table	Table	*	*	implied:Table
382	Disclosure of objectives, policies and processes for managing capital [abstract]	Abstract			ifrs-full:DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalAbstract
383	Disclosure of objectives, policies and processes for managing capital [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalExplanatory
384	1047 - Disclosure - Related-party Transactions	Network	*	*	http://auo.com/role/RelatedPartyTransactions
385	Implied Table	Table	*	*	implied:Table
386	Disclosure of related party transactions [Abstract]	Abstract			auo:DisclosureOfRelatedPartyTransactionsAbstract
387	Disclosure of related party [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRelatedPartyExplanatory
388	1048 - Disclosure - Pledged Assets	Network	*	*	http://auo.com/role/PledgedAssets
389	Implied Table	Table	*	*	implied:Table
390	Disclosure of Pledged Assets [Abstract]	Abstract			auo:DisclosureOfPledgedAssetsAbstract
391	Disclosure of collateral [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCollateralExplanatory
392	1049 - Disclosure - Contingent Liabilities and Commitments	Network	*	*	http://auo.com/role/ContingentLiabilitiesAndCommitments
393	Implied Table	Table	*	*	implied:Table
394	Disclosure of Contingent Liabilities and Commitments [Abstract]	Abstract			auo:DisclosureOfContingentLiabilitiesAndCommitmentsAbstract
395	Disclosure of commitments and contingent liabilities [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
396	1050 - Disclosure - Segment, Geographic and Revenue Information	Network	*	*	http://auo.com/role/SegmentGeographicAndRevenueInformation
397	Implied Table	Table	*	*	implied:Table
398	Disclosure of Segment, Geographic and Revenue Information [Abstract]	Abstract			auo:DisclosureOfSegmentGeographicAndRevenueInformationAbstract
399	Disclosure of entity's operating segments [text Block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
400	1051 - Disclosure - Subsequent Events	Network	*	*	http://auo.com/role/SubsequentEvents
401	Implied Table	Table	*	*	implied:Table
402	Disclosure of Subsequent event [Abstract]	Abstract			auo:DisclosureOfSubsequentEventAbstract
403	Disclosure of events after reporting period [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
404	1052 - Disclosure - Summary of Significant Accounting Policies (Policies)	Network	*	*	http://auo.com/role/SummaryOfSignificantAccountingPoliciesPolicies
405	Implied Table	Table	*	*	implied:Table
406	Disclosure of significant accounting policies [Abstract]	Abstract			auo:DisclosureOfSignificantAccountingPoliciesAbstract
407	Statement of IFRS compliance [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:StatementOfIFRSCompliance
408	Disclosure of basis of preparation of financial statements [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory
409	Disclosure of basis of consolidation [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBasisOfConsolidationExplanatory
410	Description of accounting policy for foreign currency translation [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
411	Description of accounting policy for classification of current and non current assets and liabilities [text block]	Concept (Text Block (HTML))	For Period		auo:DescriptionOfAccountingPolicyForClassificationOfCurrentAndNonCurrentAssetsAndLiabilitiesTextBlock
412	Description of accounting policy for determining components of cash and cash equivalents [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
413	Description of accounting policy for financial instruments [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
414	Description of accounting policy for measuring inventories [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
415	Description of accounting policy for non-current assets or disposal groups classified as held for sale [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory
416	Description of accounting policy for investment in associates [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForInvestmentInAssociates
417	Description of accounting policy for investments in joint ventures [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForInvestmentsInJointVentures
418	Description of accounting policy for investment property [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForInvestmentPropertyExplanatory
419	Description of accounting policy for property, plant and equipment [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
420	Description of accounting policy for long term prepaid rent [text Block]	Concept (Text Block (HTML))	For Period		auo:DescriptionOfAccountingPolicyForLongTermPrepaidRentTextBlock
421	Description of accounting policy for leases [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
422	Description of accounting policy for intangible assets and goodwill [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory
423	Description of accounting policy for impairment of non-financial assets [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory
424	Description of accounting policy for provisions [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
425	Description of Accounting Policy For Revenue From Contracts With Customers [Text Block]	Concept (Text Block (HTML))	For Period		auo:DescriptionOfAccountingPolicyForRevenueFromContractsWithCustomersTextBlock
426	Description of accounting policy for recognition of revenue [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
427	Description of accounting policy for employee benefits [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
428	Description of accounting policy for share-based payment transactions [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
429	Description of accounting policy for income tax [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
430	Description of accounting policy for business combinations [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory
431	Description of accounting policy for earnings per share [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
432	Description of accounting policy for segment reporting [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
433	1053 - Disclosure - Changes in Significant Accounting Policies (Tables)	Network	*	*	http://auo.com/role/ChangesInSignificantAccountingPoliciesTables
434	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
435	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
436	Currently stated [member]	Member			ifrs-full:RestatedMember
437	Increase (decrease) due to application of IFRS 15 [member]	Member			ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
438	Initial application of IFRS 9 [Member]	Member			auo:InitialApplicationOfIFRS9Member
439	Consolidated and separate financial statements [axis]	Axis			ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
440	Consolidated [member]	Member			ifrs-full:ConsolidatedMember
441	Balance sheet [Member]	Member			auo:BalanceSheetMember
442	Cash flow statement [Member]	Member			auo:CashFlowStatementMember
443	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
444	Disclosure of initial application of standards or interpretations [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfInitialApplicationOfStandardsOrInterpretations
445	1054 - Disclosure - Summary of Significant Accounting Policies (Tables)	Network	*	*	http://auo.com/role/SummaryOfSignificantAccountingPoliciesTables
446	Implied Table	Table	*	*	implied:Table
447	Disclosure of significant accounting policies [Abstract]	Abstract			auo:DisclosureOfSignificantAccountingPoliciesAbstract
448	Disclosure of subsidiaries [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory
449	1055 - Disclosure - Cash and Cash Equivalents (Tables)	Network	*	*	http://auo.com/role/CashAndCashEquivalentsTables
450	Implied Table	Table	*	*	implied:Table
451	Disclosure of cash and cash equivalents [Abstract]	Abstract			auo:DisclosureOfCashAndCashEquivalentsAbstract
452	Schedule of cash and bank balances [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCashAndBankBalancesAtCentralBanksExplanatory
453	1056 - Disclosure - Financial Assets and Liabilities at Fair Value through Profit or Loss (Tables)	Network	*	*	http://auo.com/role/FinancialAssetsAndLiabilitiesAtFairValueThroughProfitOrLossTables
454	Implied Table	Table	*	*	implied:Table
455	Financial Assets and Liabilities Measured at Fair Value Through Profit or Loss [Abstract]	Abstract			auo:FinancialAssetsAndLiabilitiesMeasuredAtFairValueThroughProfitOrLossAbstract
456	Disclosure of financial instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutFinancialInstrumentsExplanatory
457	Schedule of outstanding foreign currency forward contracts	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDerivativeFinancialInstrumentsExplanatory
458	1057 - Disclosure - Financial Assets at Fair Value Through Other Comprehensive Income (Tables)	Network	*	*	http://auo.com/role/FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeTables
459	Implied Table	Table	*	*	implied:Table
460	Disclosure Of Financial Assets at Fair Value Through Other Comprehensive Income [Abstract]	Abstract			auo:DisclosureOfFinancialAssetsAtFairValueThroughOtherComprehensiveIncomeAbstract
461	Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFairValueOfEachInvestmentInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncomeExplanatory
462	1058 - Disclosure - Available-for-sale Financial Assets-noncurrent (Tables)	Network	*	*	http://auo.com/role/AvailableForSaleFinancialAssetsNoncurrentTables
463	Implied Table	Table	*	*	implied:Table
464	Disclosure of available-for-sale financial assets [Abstract]	Abstract			auo:DisclosureOfAvailableforsaleFinancialAssetsAbstract
465	Schedule of available-for-sale financial assets [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfAvailableforsaleFinancialAssetsTextBlock
466	1059 - Disclosure - Accounts Receivable, net (Including Related and Unrelated Parties) (Tables)	Network	*	*	http://auo.com/role/AccountsReceivableNetIncludingRelatedAndUnrelatedPartiesTables
467	Implied Table	Table	*	*	implied:Table
468	Disclosure of Notes and Accounts Receivable [Abstract]	Abstract			auo:DisclosureOfNotesAndAccountsReceivableAbstract
469	Schedule of trade receivables [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfTradeReceivablesTextBlock
470	Analysis of expected credit losses for accounts receivable	Concept (Text Block (HTML))	For Period		auo:AnalysisOfExpectedCreditLossesForAccountsReceivableTableTextBlock
471	Analysis of age of financial assets that are past due but not impaired	Concept (Text Block (HTML))	For Period		ifrs-full:AnalysisOfAgeOfFinancialAssetsThatArePastDueButNotImpaired
472	Schedule of loss allowance for accounts receivable	Concept (Text Block (HTML))	For Period		auo:ScheduleOfAllowanceForDoubtfulAccountsTextBlock
473	Schedule of trade receivables factoring [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfTradeReceivablesFactoringTextBlock
474	1060 - Disclosure - Inventories (Tables)	Network	*	*	http://auo.com/role/InventoriesTables
475	Implied Table	Table	*	*	implied:Table
476	Disclosure of Inventories [Abstract]	Abstract			auo:DisclosureOfInventoriesAbstract
477	Schedule Of Inventory [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleofinventoryTextBlock
478	1061 - Disclosure - Investments in equity-accounted Investees (Tables)	Network	*	*	http://auo.com/role/InvestmentsInEquityAccountedInvesteesTables
479	Implied Table	Table	*	*	implied:Table
480	Disclosure of Investments in equity-accounted Investees [Abstract]	Abstract			auo:DisclosureOfInvestmentsInEquityaccountedInvesteesAbstract
481	Schedule of interests in other entities [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInterestsInOtherEntitiesExplanatory
482	Schedule of interests in associates [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInterestsInAssociatesExplanatory
483	Schedule of joint ventures [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfJointVenturesExplanatory
484	1062 - Disclosure - Acquisition of Subsidiaries (Tables)	Network	*	*	http://auo.com/role/AcquisitionOfSubsidiariesTables
485	Implied Table	Table	*	*	implied:Table
486	Disclosure Of Acquisition Subsidiaries [Abstract]	Abstract			auo:DisclosureOfAcquisitionSubsidiariesAbstract
487	Disclosure of detailed information about business combinations [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory
488	1063 - Disclosure - Disposal of Part of Ownership Interest in Subsidiary without Losing Control (Tables)	Network	*	*	http://auo.com/role/DisposalOfPartOfOwnershipInterestInSubsidiaryWithoutLosingControlTables
489	Implied Table	Table	*	*	implied:Table
490	Disclosure Of Disposal of Part of Ownership Interest in Subsidiary without Losing Control [Abstract]	Abstract			auo:DisclosureOfDisposalOfPartOfOwnershipInterestInSubsidiaryWithoutLosingControlAbstract
491	Disclosure Of Effects Of Changes In Parents Ownership Interest In Subsidiary That Do Not Result In Loss Of Control On Equity Attributable To Owners Of Parent Explanatory [text block]	Concept (Text Block (HTML))	For Period		auo:DisclosureOfEffectsOfChangesInParentsOwnershipInterestInSubsidiaryThatDoNotResultInLossOfControlOnEquityAttributableToOwnersOfParentExplanatoryTextBlock
492	1064 - Disclosure - Disposal of Subsidiaries (Tables)	Network	*	*	http://auo.com/role/DisposalOfSubsidiariesTables
493	Statement [Table]	Table	*	*	us-gaap:StatementTable
494	Class of Stock [Axis]	Axis			us-gaap:StatementClassOfStockAxis
495	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
496	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
497	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
498	CGPC to SSEC [Member]	Member			auo:CGPCToSSECMember
499	FGPC and TGPC to SSEC [member]	Member			auo:FGPCAndTGPCToSSECMember
500	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
501	Disclosure of detailed information about carrying value of assets and liabilities in subsidiary or businesses acquired or disposed [Text Block]	Concept (Text Block (HTML))	For Period		auo:DisclosureOfDetailedInformationAboutCarryingValueOfAssetsAndLiabilitiesInSubsidiaryOrBusinessesAcquiredOrDisposedTextBlock
502	1065 - Disclosure - Property, Plant and Equipment (Tables)	Network	*	*	http://auo.com/role/PropertyPlantAndEquipmentTables
503	Implied Table	Table	*	*	implied:Table
504	Disclosure of detailed information about property, plant and equipment [abstract]	Abstract			ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
505	Schedule of property, plant and equipment [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
506	1066 - Disclosure - Investment Property (Tables)	Network	*	*	http://auo.com/role/InvestmentPropertyTables
507	Implied Table	Table	*	*	implied:Table
508	Disclosure of detailed information about investment property [abstract]	Abstract			ifrs-full:DisclosureOfInvestmentPropertyAbstract
509	Schedule of investment property [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutInvestmentPropertyExplanatory
510	1067 - Disclosure - Intangible Assets (Tables)	Network	*	*	http://auo.com/role/IntangibleAssetsTables
511	Implied Table	Table	*	*	implied:Table
512	Disclosure of detailed information about intangible assets [abstract]	Abstract			ifrs-full:DisclosureOfIntangibleAssetsAbstract
513	Schedule of intangible assets [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory
514	Disclosure of goodwill [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfGoodwillExplanatory
515	1068 - Disclosure - Other Current Assets and Other Noncurrent Assets (Tables)	Network	*	*	http://auo.com/role/OtherCurrentAssetsAndOtherNoncurrentAssetsTables
516	Implied Table	Table	*	*	implied:Table
517	Disclosure of Other Current Assets And Other Noncurrent Assets [Abstract]	Abstract			auo:DisclosureOfOtherCurrentAssetsAndOtherNoncurrentAssetsAbstract
518	Schedule of other assets [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfOtherAssetsTextBlock
519	1069 - Disclosure - Short-term Borrowings (Tables)	Network	*	*	http://auo.com/role/ShortTermBorrowingsTables
520	Implied Table	Table	*	*	implied:Table
521	Disclosure of Short term Borrowings [Abstract]	Abstract			auo:DisclosureOfShortTermBorrowingsAbstract
522	Schedule of short term borrowings [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfShortTermBorrowingsTextBlock
523	1070 - Disclosure - Long-term Borrowings (Tables)	Network	*	*	http://auo.com/role/LongTermBorrowingsTables
524	Implied Table	Table	*	*	implied:Table
525	Disclosure Of Long Term [Abstract]	Abstract			auo:DisclosureOfLongTermAbstract
526	Schedule of long term borrowings [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfLongTermBorrowingsTextBlock
527	Disclosure of detailed information about reconciliation of liabilities to cash flow arising from financing activities explanatory [Text Block]	Concept (Text Block (HTML))	For Period		auo:DisclosureOfDetailedInformationAboutReconciliationOfLiabilitiesToCashFlowArisingFromFinancingActivitiesExplanatoryTextBlock
528	1071 - Disclosure - Provisions (Tables)	Network	*	*	http://auo.com/role/ProvisionsTables
529	Implied Table	Table	*	*	implied:Table
530	Disclosure Of Provisions [Abstract]	Abstract			auo:DisclosureOfProvisionsAbstract
531	Schedule of provisions [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfProvisionsTextBlock
532	1072 - Disclosure - Operating Leases (Tables)	Network	*	*	http://auo.com/role/OperatingLeasesTables
533	Implied Table	Table	*	*	implied:Table
534	Disclosure Of Operating Leases [Abstract]	Abstract			auo:DisclosureOfOperatingLeasesAbstract
535	Schedule of future maturities of operating lease payments [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsExplanatory
536	Schedule of future maturities of finance lease receivable [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableExplanatory
537	1073 - Disclosure - Employee Benefits (Tables)	Network	*	*	http://auo.com/role/EmployeeBenefitsTables
538	Implied Table	Table	*	*	implied:Table
539	Disclosure of Employee Benefits [Abstract]	Abstract			auo:DisclosureOfEmployeeBenefitsAbstract
540	Schedule of net defined benefit liability [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfNetDefinedBenefitLiabilityTextBlock
541	Schedule of reconciliation for net defined benefit liability and its components [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfReconciliationForNetDefinedBenefitLiabilityAndItsComponentsTextBlock
542	Schedule of principal actuarial assumptions used [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfPrincipalActuarialAssumptionsUsedTextBlock
543	Disclosure of additional information about defined benefit plans [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAdditionalInformationAboutDefinedBenefitPlansExplanatory
544	1074 - Disclosure - Capital and Other Components of Equity (Tables)	Network	*	*	http://auo.com/role/CapitalAndOtherComponentsOfEquityTables
545	Implied Table	Table	*	*	implied:Table
546	Disclosure of Capital and Other Components of Equity [Abstract]	Abstract			auo:DisclosureOfCapitalAndOtherComponentsOfEquityAbstract
547	Schedule of reserves within equity [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReservesAndOtherEquityInterestExplanatory
548	Disclosure of appropriation of earnings [text block]	Concept (Text Block (HTML))	For Period		auo:DisclosureOfAppropriationOfEarningsTextBlock
549	Schedule of other components of equity [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfOtherComponentsOfEquityTextBlock
550	Schedule of non-controlling interests [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfNoncontrollingInterestsTextBlock
551	1075 - Disclosure - Share-based Payments (Tables)	Network	*	*	http://auo.com/role/ShareBasedPaymentsTables
552	Implied Table	Table	*	*	implied:Table
553	Disclosure of Share-based Payments [Abstract]	Abstract			auo:DisclosureOfSharebasedPaymentsAbstract
554	Schedule of number and weighted average exercise prices of DPTW option plan [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfNumberAndWeightedAverageExercisePricesOfDtpwOptionPlanTextBlock
555	Schedule of terms and conditions of ACTW option plan [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfTermsAndConditionsOfActwOptionPlanTextBlock
556	Schedule of valuation information of ACTW option plan [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfValuationInformationOfActwOptionPlanTextBlock
557	Schedule of number and weighted average exercise prices of ACTW option plan [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfNumberAndWeightedAverageExercisePricesOfActwOptionPlanTextBlock
558	1076 - Disclosure - Revenue from Contracts with Customers (Tables)	Network	*	*	http://auo.com/role/RevenueFromContractsWithCustomersTables
559	Implied Table	Table	*	*	implied:Table
560	Disclosure Of Revenue from Contracts with Customers [Abstract]	Abstract			auo:DisclosureOfRevenueFromContractsWithCustomersAbstract
561	Schedule of Revenue from Contracts with Customers on Pimary Geographical Markets [Text Block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfRevenueFromContractsWithCustomersOnPimaryGeographicalMarketsTextBlock
562	Schedule of Revenue from Contracts with Customers on Major Products [Text Block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfRevenueFromContractsWithCustomersOnMajorProductsTextBlock
563	Schedule of Revenue from Contracts on Major Customers [Text Block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfRevenueFromContractsOnMajorCustomersTextBlock
564	1077 - Disclosure - Revenue (Tables)	Network	*	*	http://auo.com/role/RevenueTables
565	Implied Table	Table	*	*	implied:Table
566	Disclosure of Revenue [Abstract]	Abstract			auo:DisclosureOfRevenueAbstract
567	Schedule of revenues [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfRevenuesTextBlock
568	1078 - Disclosure - The Nature of Expenses (Tables)	Network	*	*	http://auo.com/role/TheNatureOfExpensesTables
569	Implied Table	Table	*	*	implied:Table
570	Disclosure of Expenses By Nature Explanatory [Abstract]	Abstract			auo:DisclosureOfExpensesByNatureExplanatoryAbstract
571	Schedule of expenses by nature [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfExpensesByNatureTextBlock
572	1079 - Disclosure - Other Income (Tables)	Network	*	*	http://auo.com/role/OtherIncomeTables
573	Implied Table	Table	*	*	implied:Table
574	Disclosure of other income explanatory [Abstract]	Abstract			auo:DisclosureOfOtherIncomeExplanatoryAbstract
575	Schedule of other income [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfOtherIncomeTextBlock
576	1080 - Disclosure - Other Gains and Losses (Tables)	Network	*	*	http://auo.com/role/OtherGainsAndLossesTables
577	Implied Table	Table	*	*	implied:Table
578	Disclosure of other gains and losses [Abstract]	Abstract			auo:DisclosureOfOtherGainsAndLossesAbstract
579	Schedule of other gains and losses [Text Block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfOtherGainsAndLossesTextBlock
580	1081 - Disclosure - Finance Costs (Tables)	Network	*	*	http://auo.com/role/FinanceCostsTables
581	Implied Table	Table	*	*	implied:Table
582	Disclosure of finance cost explanatory [Abstract]	Abstract			auo:DisclosureOfFinanceCostExplanatoryAbstract
583	Schedule of borrowing costs [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBorrowingCostsExplanatory
584	1082 - Disclosure - Income Taxes (Tables)	Network	*	*	http://auo.com/role/IncomeTaxesTables
585	Implied Table	Table	*	*	implied:Table
586	Disclosure of income tax explanatory [Abstract]	Abstract			auo:DisclosureOfIncomeTaxExplanatoryAbstract
587	Schedule of components of income tax expense [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfComponentsOfIncomeTaxExpenseTableTextBlock
588	Schedule of information about income taxes expense (benefit) recognized directly in other comprehensive income [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfInformationAboutIncomeTaxesExpenseBenefitRecognizedDirectlyInOtherComprehensiveIncomeTextBlock
589	Schedule of income tax reconciliation [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfIncomeTaxReconciliationTextBlock
590	Schedule of deferred taxes [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDeferredTaxesExplanatory
591	Schedule of changes in deferred tax assets and liabilities [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfChangesInDeferredTaxAssetsAndLiabilitiesTextBlock
592	Schedule of unrecognized deferred tax assets [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfUnrecognizedDeferredTaxAssetsTextBlock
593	Schedule of information about unused tax losses carryforwards [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfInformationAboutUnusedTaxLossesCarryforwardsTextBlock
594	1083 - Disclosure - Earnings per Share (Tables)	Network	*	*	http://auo.com/role/EarningsPerShareTables
595	Implied Table	Table	*	*	implied:Table
596	Disclosure of Earnings per Share [Abstract]	Abstract			auo:DisclosureOfEarningsPerShareAbstract
597	Schedule of basic earnings per share [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:EarningsPerShareExplanatory
598	Schedule of diluted earnings per share [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfDilutedEarningsPerShareTextBlock
599	1084 - Disclosure - Financial Instruments (Tables)	Network	*	*	http://auo.com/role/FinancialInstrumentsTables
600	Implied Table	Table	*	*	implied:Table
601	Disclosure of financial instrument [Abstract]	Abstract			auo:DisclosureOfFinancialInstrumentAbstract
602	Schedule of carrying amount and fair value of financial instruments [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfCarryingAmountAndFairValueOfFinancialInstrumentsTextBlock
603	Schedule of fair value measurement of assets and liabilities on a recurring basis [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfFairValueMeasurementOfAssetsAndLiabilitiesOnRecurringBasisTextBlock
604	Schedule of changes in Level 3 fair value measurement [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfChangesInLevel3FairValueMeasurementTextBlock
605	Schedule of changes in Level 3 valuation processes and quantitative fair value measurement [Text Block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfChangesInLevel3ValuationProcessesAndQuantitativeFairValueMeasurementTextBlock
606	1085 - Disclosure - Financial Risk Management (Tables)	Network	*	*	http://auo.com/role/FinancialRiskManagementTables
607	Disclosure Of Financial Risk Management Explanatory [Table]	Table	*	*	auo:DisclosureOfFinancialRiskManagementExplanatoryTable
608	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
609	Risks [member]	Member			ifrs-full:TypesOfRisksMember
610	Currency risk [member]	Member			ifrs-full:CurrencyRiskMember
611	Disclosure of Financial Risk Management Explanatory [Line Items]	LineItems			auo:DisclosureOfFinancialsRiskManagementExplanatoryLineItems
612	Schedule of maturity analysis for financial liabilities [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfMaturityAnalysisForFinancialLiabilitiesTextBlock
613	Disclosure of detailed information about exposure to foreign currency risk [text block]	Concept (Text Block (HTML))	For Period		auo:DisclosureOfDetailedInformationAboutExposureToForeignCurrencyRiskTextBlock
614	Schedule of sensitivity analysis of currency risk [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfSensitivityAnalysisOfCurrencyRiskTextBlock
615	1086 - Disclosure - Capital Management (Tables)	Network	*	*	http://auo.com/role/CapitalManagementTables
616	Implied Table	Table	*	*	implied:Table
617	Disclosure of objectives, policies and processes for managing capital [abstract]	Abstract			ifrs-full:DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalAbstract
618	Schedule of information about capital management [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfInformationAboutCapitalManagementTextBlock
619	1087 - Disclosure - Related-party Transactions (Tables)	Network	*	*	http://auo.com/role/RelatedPartyTransactionsTables
620	Implied Table	Table	*	*	implied:Table
621	Disclosure of related party transactions [Abstract]	Abstract			auo:DisclosureOfRelatedPartyTransactionsAbstract
622	Disclosure of information about key management personnel [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInformationAboutKeyManagementPersonnelExplanatory
623	Schedule of sales transactions between related parties [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory
624	Schedule of purchases transactions between related parties [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfPurchasesTransactionsBetweenRelatedPartiesTextBlock
625	Schedule of acquisition of property, plant and equipment in related party transactions [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfAcquisitionPropertyPlantAndEquipmentInRelatedPartyTransactionsTextBlock
626	Schedule of disposal of property, plant and equipment in related party transactions [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfDisposalOfPropertyPlantAndEquipmentInRelatedPartyTransactionsTextBlock
627	Schedule of other related party transactions [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfOtherRelatedPartyTransactionsTextBlock
628	1088 - Disclosure - Pledged Assets (Tables)	Network	*	*	http://auo.com/role/PledgedAssetsTables
629	Implied Table	Table	*	*	implied:Table
630	Disclosure of Pledged Assets [Abstract]	Abstract			auo:DisclosureOfPledgedAssetsAbstract
631	Schedule of assets pledged as collateral [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfAssetsPledgedAsCollateralTextBlock
632	1089 - Disclosure - Contingent Liabilities and Commitments (Tables)	Network	*	*	http://auo.com/role/ContingentLiabilitiesAndCommitmentsTables
633	Implied Table	Table	*	*	implied:Table
634	Disclosure of Contingent Liabilities and Commitments [Abstract]	Abstract			auo:DisclosureOfContingentLiabilitiesAndCommitmentsAbstract
635	Schedule of outstanding letters of credit [text block]	Concept (Text Block (HTML))	For Period		auo:ScheduleOfOutstandingLettersOfCreditTableTextBlock
636	1090 - Disclosure - Segment, Geographic and Revenue Information (Tables)	Network	*	*	http://auo.com/role/SegmentGeographicAndRevenueInformationTables
637	Implied Table	Table	*	*	implied:Table
638	Disclosure of Segment, Geographic and Revenue Information [Abstract]	Abstract			auo:DisclosureOfSegmentGeographicAndRevenueInformationAbstract
639	Schedule of segment reporting information [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfOperatingSegmentsExplanatory
640	Schedule of revenue and non current assets by geographical areas [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfGeographicalAreasExplanatory
641	Schedule of revenue by major customers [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSegmentsMajorCustomersExplanatory
642	Schedule of revenue by products and services [text block]	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfProductsAndServicesExplanatory
643	1091 - Disclosure - Changes in Significant Accounting Policies (Details)	Network	*	*	http://auo.com/role/ChangesInSignificantAccountingPoliciesDetails
644	Disclosure of initial application of standards or interpretations [table]	Table	*	*	ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsTable
645	Categories of financial assets [axis]	Axis			ifrs-full:CategoriesOfFinancialAssetsAxis
646	Financial assets, category [member]	Member			ifrs-full:FinancialAssetsCategoryMember
647	Cash and cash equivalents [member]	Member			auo:CashAndCashEquivalentMember
648	Receivables, net (including related parties) [member]	Member			auo:ReceivablesNetincludingRelatedPartiesMember
649	Other financial assets, refundable deposits and restricted cash in banks [member]	Member			auo:OtherFinancialAssetsRefundableDepositsAndRestrictedCashInBanksMember
650	Long-term receivables [member]	Member			auo:LongTermReceivablesMember
651	Derivatives [member]	Member			ifrs-full:DerivativesMember
652	Investments in equity instruments [member]	Member			auo:InvestmentsInEquityInstrumentsMember
653	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
654	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
655	Amortized cost [member]	Member			ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember
656	Mandatorily at FVTPL [member]	Member			auo:MandatorilyAtFVTPLMember
657	FVTOCI [member]	Member			auo:FVTOCIMember
658	Loans and receivables [member]	Member			ifrs-full:LoansAndReceivablesCategoryMember
659	Held for trading [member]	Member			auo:HeldForTradingMember
660	Available-for-sale [member]	Member			auo:AvailableForSaleMember
661	Financial effect of transition from previous GAAP to IFRSs [axis]	Axis			ifrs-full:FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis
662	IFRSs [member]	Member			ifrs-full:IFRSsMember
663	Application of IFRS 9 [member]	Member			auo:ApplicationOfIFRS9Member
664	Under IAS 39 [member]	Member			auo:UnderIAS39Member
665	Disclosure of initial application of standards or interpretations [line items]	LineItems			ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsLineItems
666	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
667	1092 - Disclosure - Changes in Significant Accounting Policies (Details 1)	Network	*	*	http://auo.com/role/ChangesInSignificantAccountingPoliciesDetails1
668	Disclosure of initial application of standards or interpretations [table]	Table	*	*	ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsTable
669	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
670	Currently stated [member]	Member			ifrs-full:RestatedMember
671	Events of reclassification of financial assets [axis]	Axis			ifrs-full:EventsOfReclassificationOfFinancialAssetsAxis
672	Events of reclassification of financial assets [member]	Member			ifrs-full:EventsOfReclassificationOfFinancialAssetsMember
673	Reclassification [member]	Member			auo:ReclassificationMember
674	Equity instruments [member]	Member			auo:EquityInstrumentsMember
675	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
676	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
677	Financial effect of transition from previous GAAP to IFRSs [axis]	Axis			ifrs-full:FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis
678	IFRSs [member]	Member			ifrs-full:IFRSsMember
679	Application of IFRS 9 [Member]	Member			auo:ApplicationOfIFRS9Member
680	Categories of financial assets [axis]	Axis			ifrs-full:CategoriesOfFinancialAssetsAxis
681	Financial assets, category [member]	Member			ifrs-full:FinancialAssetsCategoryMember
682	From available-for-sales financial assets [member]	Member			ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
683	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
684	Risks [member]	Member			ifrs-full:TypesOfRisksMember
685	FVTOCI [Member]	Member			auo:FVTOCIMember
686	Disclosure of initial application of standards or interpretations [line items]	LineItems			ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsLineItems
687	Financial assets at FVTOCI	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncome
688	Adjustments to retained earnings	Concept (Monetary)	As Of	Credit	auo:AdjustmentsToRetainedEarnings
689	Adjustments to other equity	Concept (Monetary)	As Of	Credit	auo:AdjustmentsToOtherEquity
690	1093 - Disclosure - Changes in Significant Accounting Policies (Details 2)	Network	*	*	http://auo.com/role/ChangesInSignificantAccountingPoliciesDetails2
691	Disclosure of initial application of standards or interpretations [table]	Table	*	*	ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsTable
692	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
693	Currently stated [member]	Member			ifrs-full:RestatedMember
694	Previously stated under IAS 39 [member]	Member			ifrs-full:PreviouslyStatedMember
695	Adjustments on initial application of new standards [member]	Member			auo:AdjustmentsOnInitialApplicationOfNewStandardsMember
696	Retrospective application of IFRS 9 by associates accounted for using equity method	Member			auo:RetrospectiveApplicationOfIFRS9ByAssociatesAccountedForUsingEquityMethodMember
697	Financial effect of transition from previous GAAP to IFRSs [axis]	Axis			ifrs-full:FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis
698	IFRSs [member]	Member			ifrs-full:IFRSsMember
699	Application of IFRS 9 [member]	Member			auo:ApplicationOfIFRS9Member
700	Disclosure of initial application of standards or interpretations [line items]	LineItems			ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsLineItems
701	Investments in equity-accounted investees	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentAccountedForUsingEquityMethod
702	Adjustments To Retained Earnings	Concept (Monetary)	As Of	Credit	auo:AdjustmentsToRetainedEarnings
703	Adjustments To Other Equity	Concept (Monetary)	As Of	Credit	auo:AdjustmentsToOtherEquity
704	1094 - Disclosure - Changes in Significant Accounting Policies (Details 3)	Network	*	*	http://auo.com/role/ChangesInSignificantAccountingPoliciesDetails3
705	Disclosure of initial application of standards or interpretations [table]	Table	*	*	ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsTable
706	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
707	Currently stated [member]	Member			ifrs-full:RestatedMember
708	Increase (decrease) due to changes in accounting policy [member]	Member			ifrs-full:FinancialEffectOfChangesInAccountingPolicyMember
709	Financial effect of transition from previous GAAP to IFRSs [axis]	Axis			ifrs-full:FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis
710	IFRSs [member]	Member			ifrs-full:IFRSsMember
711	Application of IFRS 15 [member]	Member			auo:ApplicationOf15IFRSMember
712	Under IAS 18 and related standards and interpretations [member]	Member			auo:UnderIAS18AndRelatedStandardsAndInterpretationsMember
713	Disclosure of initial application of standards or interpretations [line items]	LineItems			ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsLineItems
714	Accounts receivable, net	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
715	Accounts receivable from related parties, net	Concept (Monetary)	As Of	Debit	auo:CurrentAccountsReceivablesDueFromRelatedParties
716	Total assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
717	Other current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:OtherCurrentLiabilities
718	Total liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
719	1095 - Disclosure - Changes in Significant Accounting Policies (Details 4)	Network	*	*	http://auo.com/role/ChangesInSignificantAccountingPoliciesDetails4
720	Disclosure of initial application of standards or interpretations [table]	Table	*	*	ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsTable
721	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
722	Currently stated [member]	Member			ifrs-full:RestatedMember
723	Increase (decrease) due to changes in accounting policy [member]	Member			ifrs-full:FinancialEffectOfChangesInAccountingPolicyMember
724	Financial effect of transition from previous GAAP to IFRSs [axis]	Axis			ifrs-full:FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis
725	IFRSs [member]	Member			ifrs-full:IFRSsMember
726	Under IAS 18 and related standards and interpretations [member]	Member			auo:UnderIAS18AndRelatedStandardsAndInterpretationsMember
727	Application of IFRS 15 [member]	Member			auo:ApplicationOf15IFRSMember
728	Disclosure of initial application of standards or interpretations [line items]	LineItems			ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsLineItems
729	Accounts receivable	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
730	Receivables from related parties	Concept (Monetary)	For Period	Debit	auo:AdjustmentsForDecreaseIncreaseInReceivablesFromRelatedParties
731	Other current liabilities	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInOtherCurrentLiabilities
732	Net cash provided by (used in) operating activities	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperatingActivities
733	Net increase (decrease) in cash and cash equivalents	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
734	1096 - Disclosure - Changes in Significant Accounting Policies (Details Textual)	Network	*	*	http://auo.com/role/ChangesInSignificantAccountingPoliciesDetailsTextual
735	Disclosure of initial application of standards or interpretations [table]	Table	*	*	ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsTable
736	Financial effect of transition from previous GAAP to IFRSs [axis]	Axis			ifrs-full:FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis
737	IFRSs [member]	Member			ifrs-full:IFRSsMember
738	Application of IFRS 9 [member]	Member			auo:ApplicationOfIFRS9Member
739	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
740	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
741	FVTOCI [member]	Member			auo:FVTOCIMember
742	Categories of financial assets [axis]	Axis			ifrs-full:CategoriesOfFinancialAssetsAxis
743	Financial assets, category [member]	Member			ifrs-full:FinancialAssetsCategoryMember
744	From available-for-sale financial assets [member]	Member			auo:FromAvailableforsaleFinancialAssetsMember
745	Classes of entity's own equity instruments [axis]	Axis			ifrs-full:ClassesOfEntitysOwnEquityInstrumentsAxis
746	Entity's own equity instruments [member]	Member			ifrs-full:EntitysOwnEquityInstrumentsMember
747	Other equity - Unrealized gains (losses) on available-for-sale financial assets [member]	Member			auo:OtherEquityUnrealizedGainslossesOnAvailableforsaleFinancialAssetsMember
748	Other equity - Unrealized gains (losses) on financial assets at FVTOCI [member]	Member			auo:OtherEquityUnrealizedGainslossesOnFinancialAssetsAtFVTOCIMember
749	Retrospective application and retrospective restatement [axis]	Axis			ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
750	Currently stated [member]	Member			ifrs-full:RestatedMember
751	Increase (decrease) due to changes in accounting policy [member]	Member			ifrs-full:FinancialEffectOfChangesInAccountingPolicyMember
752	Retrospective application of IFRS 9 by associates accounted for using equity method [member]	Member			auo:RetrospectiveApplicationOfIFRS9ByAssociatesAccountedForUsingEquityMethodMember
753	Disclosure of initial application of standards or interpretations [line items]	LineItems			ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsLineItems
754	Adjustments to other equity	Concept (Monetary)	As Of	Credit	auo:AdjustmentsToOtherEquity
755	Adjustments to retained earnings	Concept (Monetary)	As Of	Credit	auo:AdjustmentsToRetainedEarnings
756	Investments in equity-accounted investees	Concept (Monetary)	As Of	Debit	auo:InvestmentsInEquityaccountedInvestees
757	1097 - Disclosure - Summary of Significant Accounting Policies (Details)	Network	*	*	http://auo.com/role/SummaryOfSignificantAccountingPoliciesDetails
758	Disclosure of significant accounting policies [Table]	Table	*	*	auo:DisclosureOfSignificantAccountingPoliciesTable
759	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
760	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
761	Konly [Member]	Member			auo:KonlyMember
762	ACTW [Member]	Member			auo:ActwMember
763	SDMC [Member]	Member			auo:SdmcMember
764	AUXM [Member]	Member			auo:AuxmMember
765	AUSH [Member]	Member			auo:AushMember
766	AUO [Member]	Member			auo:AuoMember
767	AUO, Konly and Ronly [Member]	Member			auo:AuoKonlyAndRonlyMember
768	AULB [Member]	Member			auo:AulbMember
769	AULB and DPTW [Member]	Member			auo:AulbAndDptwMember
770	AUSG [Member]	Member			auo:AusgMember
771	DPTW [Member]	Member			auo:DptwMember
772	FHVI [Member]	Member			auo:FhviMember
773	FRVI [Member]	Member			auo:FrviMember
774	FFMI [Member]	Member			auo:FfmiMember
775	FWSA and FTMI [Member]	Member			auo:FwsaAndFtmiMember
776	PMSA [Member]	Member			auo:PmsaMember
777	FLMI [Member]	Member			auo:FlmiMember
778	DPLB [Member]	Member			auo:DplbMember
779	DPHK [Member]	Member			auo:DphkMember
780	BVLB [Member]	Member			auo:BvlbMember
781	FTMI [Member]	Member			auo:FtmiMember
782	CQIL [Member]	Member			auo:CQILMember
783	CQHLD [Member]	Member			auo:CQHLDMember
784	AUO Konly Ronly and ACTW [Member]	Member			auo:AUOKonlyRonlyAndACTWMember
785	AUO and AULB [Member]	Member			auo:AuoAndAulbMember
786	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
787	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
788	Space Money Inc. (SMI) [Member]	Member			auo:SpaceMoneyIncMember
789	Darwin Precisions (L) Corp. (DPLB) [Member]	Member			auo:DarwinPrecisionsCorporationMember
790	LiGen Power Corporation (LGPC) [Member]	Member			auo:LigenPowerCorporationMember
791	AUO Crystal (Malaysia) Sdn. Bhd. (ACMK) [Member]	Member			auo:AuoCrystalMalaysiaSdnBhdMember
792	M.Setek Co., Ltd. (M.Setek) [Member]	Member			auo:MsetekCoLtdMember
793	AU Optronics Corporation America (AUUS) [Member]	Member			auo:AuOptronicsCorporationAmericaMember
794	AU Optronics Corporation Japan (AUJP) [Member]	Member			auo:AuOptronicsCorporationJapanMember
795	AU Optronics Europe B.V. (AUNL) [Member]	Member			auo:AuOptronicsEuropeBvMember
796	AU Optronics Korea Ltd. (AUKR) [Member]	Member			auo:AuOptronicsKoreaLtdMember
797	AU Optronics (Czech) s.r.o. (AUCZ) [Member]	Member			auo:AuOptronicsCzechSroMember
798	AU Optronics (Shanghai) Co., Ltd. (AUSH) [Member]	Member			auo:AuOptronicsShanghaiCoLtdMember
799	AU Optronics (Xiamen) Corp. (AUXM) [Member]	Member			auo:AuOptronicsXiamenCorpMember
800	AU Optronics (Suzhou) Corp., Ltd. (AUSZ) [Member]	Member			auo:AuOptronicsSuzhouCorpLtdMember
801	AU Optronics Manufacturing (Shanghai) Corp. (AUSJ) [Member]	Member			auo:AuOptronicsManufacturingShanghaiCorpMember
802	AFPD Pte., Ltd. (AUST) [Member]	Member			auo:AfpdPteLtdMember
803	AU Optronics (Kunshan) Co., Ltd. (AUKS) [Member]	Member			auo:AuOptronicsKunshanCoLtdMember
804	a.u. Vista Inc. (AUVI) [Member]	Member			auo:AuVistaIncMember
805	BriView (L) Corp. (BVLB) [Member]	Member			auo:BriviewXiamenCorpMember
806	Forthouse Electronics (Suzhou) Co., Ltd. (FHWJ) [Member]	Member			auo:ForthouseElectronicsSuzhouCoLtdMember
807	Fortech Electronics (Suzhou) Co., Ltd. (FTWJ) [Member]	Member			auo:FortechElectronicsSuzhouCoLtdMember
808	Fortech Optronics (Xiamen) Co., Ltd. (FTXM) [Member]	Member			auo:FortechOptronicsXiamenCoLtdMember
809	Suzhou Forplax Optronics Co., Ltd. (FPWJ) [Member]	Member			auo:SuzhouForplaxOptronicsCoLtdMember
810	Fortech Electronics (Kunshan) Co., Ltd. (FTKS) [Member]	Member			auo:FortechElectronicsKunshanCoLtdMember
811	Full Luck (Wujiang) Precisions Co., Ltd. (FLWJ) [Member]	Member			auo:FullLuckWujiangPrecisionsCoLtdMember
812	Darwin Precisions (Slovakia) s.r.o. (DPSK) [Member]	Member			auo:DarwinPrecisionsSlovakiaSroMember
813	Darwin Precisions (Suzhou) Corp. (DPSZ) [Member]	Member			auo:DarwinPrecisionsSuzhouCorpMember
814	Darwin Precisions (Xiamen) Corp. (DPXM) [Member]	Member			auo:DarwinPrecisionsXiamenCorpMember
815	Darwin Precisions (Chengdu) Corp. (DPCD) [Member]	Member			auo:DarwinPrecisionsChengduCorpMember
816	BriView (Hefei) Co., Ltd. (BVHF) [Member]	Member			auo:BriviewHefeiCoLtdMember
817	AUO Energy (Tianjin) Corp. (AETJ) [Member]	Member			auo:AuoEnergyTianjinCorpMember
818	AUO Green Energy America Corp. (AEUS) [Member]	Member			auo:AuoGreenEnergyAmericaCorpMember
819	Sanda Materials Corporation (SDMC) [Member]	Member			auo:SandaMaterialsCorporationMember
820	AUO Crystal Corp. (ACTW) [Member]	Member			auo:AuoCrystalCorpMember
821	Darwin Precisions Corporation (DPTW) [Member]	Member			auo:DarwinPrecisionsMember
822	Forhouse International Holding Ltd. (FHVI) [Member]	Member			auo:ForhouseInternationalMember
823	Prime Forward International Ltd. (PMSA) [Member]	Member			auo:PrimeForwardMember
824	Full Luck Precisions Co., Ltd. (FLMI) [Member]	Member			auo:FullLuckPrecisionMember
825	Forefront Corporation (FFMI) [Member]	Member			auo:ForefrontMember
826	U-Fresh Technology Inc. (UTI) [Member]	Member			auo:UfreshTechnologyIncUtiMember
827	ChampionGen Power Corporation (CGPC) [Member]	Member			auo:ChampiongenPowerCorporationCgpcMember
828	BriView (Xiamen) Corp. (BVXM) [Member]	Member			auo:BriviewLCorpBvlbMember
829	Darwin Precisions (Hong Kong) Limited (DPHK) [Member]	Member			auo:DarwinPrecisionsHongKongLimitedDphkMember
830	AU Optronics (Slovakia) s.r.o. (AUSK) [Member]	Member			auo:AuOptronicsSlovakiaSroMember
831	AU Optronics (L) Corp. (AULB) [Member]	Member			auo:AuOptronicsLCorpAulbMember
832	Konly Venture Corp. (Konly) [Member]	Member			auo:KonlyVentureCorpKonlyMember
833	Ronly Venture Corp. (Ronly) [Member]	Member			auo:RonlyVentureCorpRonlyMember
834	AUO Green Energy Europe B.V. (AENL) [Member]	Member			auo:AuoGreenEnergyEuropeBvAenlMember
835	Force International Holding Ltd. (FRVI) [Member]	Member			auo:ForceInternationalHoldingLtdFrviMember
836	Fortech International Corp. (FTMI) [Member]	Member			auo:FortechInternationalCorpFtmiMember
837	Forward Optronics International Corp. (FWSA) [Member]	Member			auo:ForwardOptronicsInternationalCorpFwsaMember
838	AU Optronics Singapore Pte. Ltd. (AUSG) [Member]	Member			auo:AuOptronicsSingaporePteLtdAusgMember
839	ComQi Holdings Ltd (CQHLD) [Member]	Member			auo:ComQiHoldingsLtdCQHLDMember
840	ComQi UK Ltd (CQUK) [Member]	Member			auo:ComQiUKLtdCQUKMember
841	ComQi Inc (CQUS) [Member]	Member			auo:ComQiIncCQUSMember
842	ComQi Canada Inc (CQCA) [Member]	Member			auo:ComQiCanadaIncCQCAMember
843	U-Fresh Technology (Suzhou) Co Ltd (UFSZ) [Member]	Member			auo:UFreshTechnologySuzhouCoLtdUFSZMember
844	Edgetech Data Technologies (Suzhou) Corp Ltd (EDT) [Member]	Member			auo:EdgetechDataTechnologiesSuzhouCorpLtdEDTMember
845	Mega Insight Smart Manufacturing (Suzhou) Corp Ltd (MIS) [Member]	Member			auo:MegaInsightSmartManufacturingSuzhouCorpLtdMISMember
846	ComQi Ltd (CQIL) [Member]	Member			auo:ComQiLtdCQILMember
847	AUO Care Information Tech (Suzhou) Co Ltd (A-Care) [Member]	Member			auo:AUOCareInformationTechSuzhouCoLtdACareMember
848	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
849	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
850	Malaysia [Member]	Member			auo:MalaysiaMember
851	Taiwan ROC [Member]	Member			auo:TaiwanRocMember
852	Japan [Member]	Member			auo:JapanMember
853	United States [Member]	Member			auo:UnitedStatesMember
854	Netherlands [Member]	Member			auo:NetherlandsMember
855	South Korea [Member]	Member			auo:SouthKoreaMember
856	Singapore [Member]	Member			auo:SingaporeMember
857	Czech Republic [Member]	Member			auo:CzechRepublicMember
858	PRC [Member]	Member			auo:PrcMember
859	Slovakia Republic [Member]	Member			auo:SlovakiaRepublicMember
860	BVI [Member]	Member			auo:BviMember
861	Mauritius [Member]	Member			auo:MauritiusMember
862	Samoa [Member]	Member			auo:SamoaMember
863	Hong Kong [Member]	Member			auo:HongKongMember
864	United Kingdom [Member]	Member			auo:UnitedKingdomMember
865	Canada [Member]	Member			auo:CanadaMember
866	Israel [Member]	Member			auo:HoldingCompanyMember
867	Disclosure of significant accounting policies [Line Items]	LineItems			auo:DisclosureOfSignificantAccountingPoliciesLineItems
868	Proportion of ownership interest in subsidiary	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInSubsidiary
869	1098 - Disclosure - Summary of Significant Accounting Policies (Details Textual)	Network	*	*	http://auo.com/role/SummaryOfSignificantAccountingPoliciesDetailsTextual
870	Disclosure of significant accounting policies [Table]	Table	*	*	auo:DisclosureOfSignificantAccountingPoliciesTable
871	Business combinations [axis]	Axis			ifrs-full:BusinessCombinationsAxis
872	Entity's total for business combinations [member]	Member			ifrs-full:EntitysTotalForBusinessCombinationsMember
873	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
874	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
875	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
876	Property, Plant and Equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
877	Buildings [member]	Member			ifrs-full:BuildingsMember
878	Machinery [member]	Member			ifrs-full:MachineryMember
879	Other property, plant and equipment [member]	Member			ifrs-full:OtherPropertyPlantAndEquipmentMember
880	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
881	Equity [Member]	Member			ifrs-full:EquityMember
882	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
883	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
884	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
885	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
886	Disclosure of significant accounting policies [Line Items]	LineItems			auo:DisclosureOfSignificantAccountingPoliciesLineItems
887	Useful lives or depreciation rates, property, plant and equipment	Concept (Text/String)	For Period		ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
888	Useful lives or amortisation rates, intangible assets other than goodwill	Concept (Text/String)	For Period		ifrs-full:UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwill
889	1099 - Disclosure - Cash and Cash Equivalents (Details)	Network	*	*	http://auo.com/role/CashAndCashEquivalentsDetails
890	Implied Table	Table	*	*	implied:Table
891	Disclosure of cash and cash equivalents [Abstract]	Abstract			auo:DisclosureOfCashAndCashEquivalentsAbstract
892	Cash on hand, demand deposits and checking accounts	Concept (Monetary)	As Of	Debit	ifrs-full:Cash
893	Time deposits	Concept (Monetary)	As Of	Debit	ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
894	Government bonds with reverse repurchase agreements	Concept (Monetary)	As Of	Debit	ifrs-full:ShorttermInvestmentsClassifiedAsCashEquivalents
895	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
896	1100 - Disclosure - Financial Assets and Liabilities Measured at Fair Value Through Profit or Loss (Details)	Network	*	*	http://auo.com/role/FinancialAssetsAndLiabilitiesMeasuredAtFairValueThroughProfitOrLossDetails
897	Disclosure of detailed information about financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfFinancialInstrumentsTable
898	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
899	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
900	Foreign currency forward contracts [member]	Member			ifrs-full:ForwardContractMember
901	Structured Deposits [Member]	Member			auo:StructuredDepositsMember
902	Disclosure of detailed information about financial instruments [line items]	LineItems			ifrs-full:DisclosureOfFinancialInstrumentsLineItems
903	Financial assets, mandatorily measured at FVTPL	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValue
904	Financial assets, held for trading	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading
905	Financial assets at fair value through profit or loss	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLoss
906	Financial liabilities, held for trading	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading
907	1101 - Disclosure - Financial Assets and Liabilities Measured at Fair Value Through Profit or Loss (Details 1)	Network	*	*	http://auo.com/role/FinancialAssetsAndLiabilitiesMeasuredAtFairValueThroughProfitOrLossDetails1
908	Statement [Table]	Table	*	*	us-gaap:StatementTable
909	Classes of financial instruments [axis]	Axis			ifrs-full:ClassesOfFinancialInstrumentsAxis
910	Financial instruments, class [member]	Member			ifrs-full:ClassesOfFinancialInstrumentsMember
911	Sell USD / Buy NTD [member]	Member			auo:ContractItemOneMember
912	Sell USD / Buy JPY [member]	Member			auo:ContractItemTwoMember
913	Sell USD / Buy CNY [member]	Member			auo:ContractItemThreeMember
914	Sell EUR / Buy JPY [member]	Member			auo:ContractItemFourMember
915	Sell EUR / Buy CZK [member]	Member			auo:ContractItemFiveMember
916	Sell USD / Buy MYR [member]	Member			auo:ContractItemSixMember
917	Sell JPY / Buy NTD [member]	Member			auo:ContractItemSevenMember
918	Sell CNY / Buy JPY [member]	Member			auo:ContractItemEightMember
919	Sell USD / Buy SGD [member]	Member			auo:ContractItemNineMember
920	Sell NTD / Buy JPY [Member]	Member			auo:ContractItemTenMember
921	Sell EUR / Buy USD [Member]	Member			auo:ContractItemElevenMember
922	Sell CNY / Buy USD [Member]	Member			auo:ContractItemTwelveMember
923	Range [Axis]	Axis			ifrs-full:RangeAxis
924	Ranges [member]	Member			ifrs-full:RangesMember
925	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
926	Top of range [member]	Member			ifrs-full:TopOfRangeMember
927	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
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951	Assumed change in risk, monetary effect	Concept (Monetary)	As Of		ifrs-full:RiskExposureAssociatedWithInstrumentsSharingCharacteristic
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963	Risks [member]	Member			ifrs-full:TypesOfRisksMember
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966	Proceeds from disposal or maturity of available-for-sale financial assets	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromDisposalOrMaturityOfAvailableforsaleFinancialAssets
967	Gains (losses) on disposals of available-for-sale financial assets	Concept (Monetary)	For Period	Credit	auo:GainsLossesOnDisposalsOfAvailableforsaleFinancialAssets
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969	Amount of sensitivity of equity securities to changes in share price	Concept (Monetary)	For Period	Debit	auo:AmountOfSensitivityOfEquitySecuritiesToChangesInSharePrice
970	Appreciation Or Depreciation Rate On Equity Price	Concept (Percent)	For Period		auo:AppreciationOrDepreciationRateOnEquityPrice
971	1106 - Disclosure - Accounts Receivable, net (Including Related and Unrelated Parties) (Details)	Network	*	*	http://auo.com/role/AccountsReceivableNetIncludingRelatedAndUnrelatedPartiesDetails
972	Implied Table	Table	*	*	implied:Table
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974	Accounts receivable	Concept (Monetary)	As Of	Debit	ifrs-full:TradeReceivables
975	Less: loss allowance	Concept (Monetary)	As Of	Credit	ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
976	Less: allowance for sales returns and discounts	Concept (Monetary)	As Of	Credit	auo:AllowanceForSalesReturnsAndDiscounts
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978	Accounts receivable, net	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
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980	1107 - Disclosure - Accounts Receivable, net (Including Related and Unrelated Parties) (Details 1)	Network	*	*	http://auo.com/role/AccountsReceivableNetIncludingRelatedAndUnrelatedPartiesDetails1
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986	Past due 61~180 days [member]	Member			auo:LaterThanTwoMonthsAndNotLaterThanSixMonthsMember
987	Past due over 180 days [member]	Member			auo:LaterThanSixMonthMember
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992	1108 - Disclosure - Accounts Receivable, net (Including Related and Unrelated Parties) (Details 2)	Network	*	*	http://auo.com/role/AccountsReceivableNetIncludingRelatedAndUnrelatedPartiesDetails2
993	Disclosure of Notes and Accounts Receivable [Table]	Table	*	*	auo:DisclosureOfNotesAndAccountsReceivableTable
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997	Past due 61~180 days [member]	Member			auo:LaterThanTwoMonthsAndNotLaterThanSixMonthsMember
998	Impairment of financial assets [axis]	Axis			ifrs-full:ImpairmentOfFinancialAssetsAxis
999	Entity's total for impairment of financial assets [member]	Member			ifrs-full:EntitysTotalForImpairmentOfFinancialAssetsMember
1000	Financial assets past due but not impaired [member]	Member			ifrs-full:FinancialAssetsPastDueButNotImpairedMember
1001	Disclosure of Notes and Accounts Receivable [Line Items]	LineItems			auo:DisclosureOfNotesAndAccountsReceivableLineItems
1002	Accounts Receivable, Net Including Related Parties	Concept (Monetary)	As Of	Debit	auo:NotesAndAccountsReceivableNetIncludingRelatedParties
1003	1109 - Disclosure - Accounts Receivable, net (Including Related and Unrelated Parties) (Details 3)	Network	*	*	http://auo.com/role/AccountsReceivableNetIncludingRelatedAndUnrelatedPartiesDetails3
1004	Disclosure of Notes and Accounts Receivable [Table]	Table	*	*	auo:DisclosureOfNotesAndAccountsReceivableTable
1005	Method of assessment of expected credit losses [axis]	Axis			ifrs-full:MethodOfAssessmentOfExpectedCreditLossesAxis
1006	Method of assessment of expected credit losses [member]	Member			ifrs-full:MethodOfAssessmentOfExpectedCreditLossesMember
1007	Expected credit losses individually assessed [member]	Member			ifrs-full:ExpectedCreditLossesIndividuallyAssessedMember
1008	Expected credit losses collectively assessed [member]	Member			ifrs-full:ExpectedCreditLossesCollectivelyAssessedMember
1009	Disclosure of Notes and Accounts Receivable [Line Items]	LineItems			auo:DisclosureOfNotesAndAccountsReceivableLineItems
1010	Balance at beginning of the year (IAS 39)	Concept (Monetary)	As Of	Credit	ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1011	Adjustments on initial application of IFRS 9	Concept (Monetary)	For Period	Credit	auo:IncreaseDecreaseThroughAdjustmentsOnInitialApplicationAllowanceAccountForCreditLossesOfFinancialAssets
1012	Provisions (reversals) charged to (against) expense	Concept (Monetary)	For Period		ifrs-full:AdditionalAllowanceRecognisedInProfitOrLossAllowanceAccountForCreditLossesOfFinancialAssets
1013	Write-offs	Concept (Monetary)	For Period	Credit	auo:WriteoffsAllowanceAccountForCreditLossesOfFinancialAssets
1014	Effect of changes in foreign currency exchange rates	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesAllowanceAccountForCreditLossesOfFinancialAssets
1015	Balance at end of the year	Concept (Monetary)	As Of	Credit	ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1016	1110 - Disclosure - Accounts Receivable, net (Including Related and Unrelated Parties) (Details 4)	Network	*	*	http://auo.com/role/AccountsReceivableNetIncludingRelatedAndUnrelatedPartiesDetails4
1017	Disclosure of Notes and Accounts Receivable [Table]	Table	*	*	auo:DisclosureOfNotesAndAccountsReceivableTable
1018	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1019	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1020	Taishin Bank [member]	Member			auo:TaishinMember
1021	Continuing involvement in derecognised financial assets by type of transfer [axis]	Axis			ifrs-full:ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfTransferAxis
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1024	Disclosure of Notes and Accounts Receivable [Line Items]	LineItems			auo:DisclosureOfNotesAndAccountsReceivableLineItems
1025	Factoring limit	Concept (Monetary)	As Of	Debit	auo:ContractualCeilingAmountOfAccountsReceivableFactoring
1026	Amount advanced	Concept (Monetary)	As Of	Debit	auo:AdvancePaidForTransferOfAssets
1027	Amount sold and derecognized	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromTransferActivity
1028	Principle terms	Concept (Text/String)	For Period		ifrs-full:LineItemsOfRecognisedAssetsAndLiabilitiesRepresentingContinuingInvolvementInDerecognisedFinancialAssets
1029	1111 - Disclosure - Accounts Receivable, net (Including Related and Unrelated Parties) (Details Textual)	Network	*	*	http://auo.com/role/AccountsReceivableNetIncludingRelatedAndUnrelatedPartiesDetailsTextual
1030	Disclosure of Accounts Receivable [Table]	Table	*	*	auo:DisclosureOfAccountsReceivableTable
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1036	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1037	Gross carrying amount [member]	Member			ifrs-full:GrossCarryingAmountMember
1038	Impairment of financial assets [axis]	Axis			ifrs-full:ImpairmentOfFinancialAssetsAxis
1039	Entity's total for impairment of financial assets [member]	Member			ifrs-full:EntitysTotalForImpairmentOfFinancialAssetsMember
1040	Individually assessed for impairment [member]	Member			auo:IndividuallyAssessedForImpairmentMember
1041	Continuing involvement in derecognised financial assets by type of instrument [axis]	Axis			ifrs-full:ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentAxis
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1043	Accounts Receivable Factoring [member]	Member			auo:AccountsReceivableFactoringMember
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1046	Amounts Sold and Derecognized [member]	Member			auo:AmountsSoldAndDerecognizedMember
1047	Disclosure of Accounts Receivable [Line Items]	LineItems			auo:DisclosureOfAccountsReceivableLineItems
1048	Payment terms granted to customers	Concept (xbrli:durationItemType)	For Period		auo:PaymentTermsGrantedToCustomers
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1050	Allowance account for credit losses of financial assets	Concept (Monetary)	As Of	Credit	ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1051	Trade receivables	Concept (Monetary)	As Of	Debit	ifrs-full:TradeReceivables
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1053	Implied Table	Table	*	*	implied:Table
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1056	Work-in-progress	Concept (Monetary)	As Of	Debit	ifrs-full:WorkInProgress
1057	Raw materials	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentMaterialsAndSuppliesToBeConsumedInProductionProcessOrRenderingServices
1058	Total	Concept (Monetary)	As Of	Debit	ifrs-full:Inventories
1059	1113 - Disclosure - Inventories (Details Textual)	Network	*	*	http://auo.com/role/InventoriesDetailsTextual
1060	Implied Table	Table	*	*	implied:Table
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1063	Inventory write-down	Concept (Monetary)	For Period		ifrs-full:InventoryWritedown2011
1064	1114 - Disclosure - Noncurrent Assets Held for Sale (Details Textual)	Network	*	*	http://auo.com/role/NoncurrentAssetsHeldForSaleDetailsTextual
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1066	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1067	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1068	Fortech Electronics Kunshan Co., Ltd [Member]	Member			auo:FortechElectronicsKunshanCoLtdMember
1069	BriView Hefei Co., Ltd [Member]	Member			auo:BriviewHefeiCoLtdMember
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1071	Assets and liabilities classified as held for sale [axis]	Axis			ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis
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1073	Non-current assets held for sale [member]	Member			ifrs-full:NoncurrentAssetsHeldForSaleMember
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1076	Gains (losses) on disposals of property, plant and equipment	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnDisposalsOfPropertyPlantAndEquipment
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1078	Implied Table	Table	*	*	implied:Table
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1081	Joint ventures	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVentures
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1083	1116 - Disclosure - Investments in equity-accounted Investees (Details 1)	Network	*	*	http://auo.com/role/InvestmentsInEquityAccountedInvesteesDetails1
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1087	Lextar Electronics Corp [member]	Member			auo:LextarElectronicsCorpMember
1088	Raydium Semiconductor Corporation [member]	Member			auo:RaydiumSemiconductorCorporationMember
1089	Daxin Materials Corp [member]	Member			auo:DaxinMaterialsCorpMember
1090	Other associate [member]	Member			auo:OtherAssociateMember
1091	Star River Energy Corporation [Member]	Member			auo:StarRiverEnergyCorporationMember
1092	SSEC [member]	Member			auo:SsecMember
1093	Disclosure of Investments in equity-accounted Investees [Line Items]	LineItems			auo:DisclosureOfInvestmentsInEquityaccountedInvesteesLineItems
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1096	Proportion of ownership interest in associate	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInAssociate
1097	Investments in associates	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInAssociates
1098	1117 - Disclosure - Investments in equity-accounted Investees (Details 2)	Network	*	*	http://auo.com/role/InvestmentsInEquityAccountedInvesteesDetails2
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1105	The Company's share of other comprehensive loss of associates	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
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1107	1118 - Disclosure - Investments in equity-accounted Investees (Details 3)	Network	*	*	http://auo.com/role/InvestmentsInEquityAccountedInvesteesDetails3
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1112	Disclosure of Investments in equity-accounted Investees [Line Items]	LineItems			auo:DisclosureOfInvestmentsInEquityaccountedInvesteesLineItems
1113	The Company's share of profits (losses) of joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfJointVenturesAccountedForUsingEquityMethod
1114	The Company's share of other comprehensive loss of joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1115	The Company's share of total comprehensive income (loss) of joint ventures	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfTotalComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1116	1119 - Disclosure - Investments in equity-accounted Investees (Details Textual)	Network	*	*	http://auo.com/role/InvestmentsInEquityAccountedInvesteesDetailsTextual
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1118	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
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1130	Consideration transferred from sales of interests in joint ventures	Concept (Monetary)	For Period	Debit	auo:ConsiderationTransferredFromSalesOfInterestsInJointVentures
1131	Total outstanding disposal consideration	Concept (Monetary)	As Of	Debit	auo:TotalOutstandingDisposalConsideration
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1134	Gains (losses) on disposals of investments	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnDisposalsOfInvestments
1135	1120 - Disclosure - Acquisition of Subsidiaries (Details)	Network	*	*	http://auo.com/role/AcquisitionOfSubsidiariesDetails
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1145	1121 - Disclosure - Acquisition of Subsidiaries (Details 1)	Network	*	*	http://auo.com/role/AcquisitionOfSubsidiariesDetails1
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1151	Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [abstract]	Abstract			ifrs-full:AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract
1152	Cash and cash equivalents	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
1153	Accounts receivable and other current assets	Concept (Monetary)	As Of	Debit	auo:AccountsReceivableAndOtherCurrentAssetsRecognisedAsOfAcquisitionDate
1154	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
1155	Intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate
1156	Accounts payable and other current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherPayablesRecognisedAsOfAcquisitionDate
1157	Other liabilities	Concept (Monetary)	As Of	Credit	auo:OtherLiablitiesRecognisedAsOfAcquisitionDate
1158	Total	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
1159	1122 - Disclosure - Acquisition of Subsidiaries (Details 2)	Network	*	*	http://auo.com/role/AcquisitionOfSubsidiariesDetails2
1160	Disclosure of detailed information about business combination [table]	Table	*	*	ifrs-full:DisclosureOfBusinessCombinationsTable
1161	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1162	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1163	ComQi Ltd. and its subsidiaries ("ComQi") [member]	Member			auo:ComQiLtdAndItsSubsidiariesComQiMember
1164	Disclosure of detailed information about business combination [line items]	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
1165	Consideration transferred	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
1166	Less: Fair value of identifiable net assets	Concept (Monetary)	As Of	Debit	ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed
1167	Goodwill arising on acquisition	Concept (Monetary)	As Of	Debit	ifrs-full:GoodwillExpectedDeductibleForTaxPurposes
1168	1123 - Disclosure - Acquisition of Subsidiaries (Details Textual)	Network	*	*	http://auo.com/role/AcquisitionOfSubsidiariesDetailsTextual
1169	Disclosure of subsidiaries [table]	Table	*	*	ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
1170	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1171	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1172	ComQi Ltd. and its subsidiaries ("ComQi") [member]	Member			auo:ComQiLtdMember
1173	Range [Axis]	Axis			ifrs-full:RangeAxis
1174	Ranges [member]	Member			ifrs-full:RangesMember
1175	Contingent Consideration Arrangements [Axis]	Axis			auo:ContingentConsiderationArrangementsAxis
1176	Contingent Consideration Arrangements [Domain]	Member			auo:ContingentConsiderationArrangementsDomain
1177	Contingent Consideration Arrangements [Member]	Member			auo:ContingentConsiderationArrangementsMember
1178	Disclosure of detailed information about business combination [line items]	LineItems			ifrs-full:DisclosureOfBusinessCombinationsLineItems
1179	Date of acquisition	Concept (Date)	For Period		ifrs-full:DateOfAcquisition2013
1180	Description of acquiree	Concept (Text/String)	For Period		ifrs-full:DescriptionOfAcquiree
1181	Proportion of voting equity interests acquired	Concept (Percent)	As Of		ifrs-full:PercentageOfVotingEquityInterestsAcquired
1182	Net revenue of combined entity	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueOfCombinedEntity
1183	Profit (loss) of combined entity	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossOfCombinedEntity
1184	Acquisition-related costs	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionrelatedCostsRecognisedAsExpenseForTransactionRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombination
1185	Contingent consideration arrangements and indemnification assets recognised as of acquisition date	Concept (Monetary)	As Of	Debit	ifrs-full:ContingentConsiderationArrangementsAndIndemnificationAssetsRecognisedAsOfAcquisitionDate
1186	Description of basis for determining amount of payment for contingent consideration arrangements	Concept (Text/String)	For Period		auo:DescriptionOfBasisForDeterminingAmountOfPaymentForContingentConsiderationArrangements
1187	Description of estimate of range of undiscounted outcomes from contingent consideration arrangements	Concept (Text/String)	For Period		auo:DescriptionOfEstimateOfRangeOfUndiscountedOutcomesFromContingentConsiderationArrangements
1188	1124 - Disclosure - Disposal of Part of Ownership Interest in Subsidiary without Losing Control (Details)	Network	*	*	http://auo.com/role/DisposalOfPartOfOwnershipInterestInSubsidiaryWithoutLosingControlDetails
1189	Implied Table	Table	*	*	implied:Table
1190	Disclosure Of Disposal of Part of Ownership Interest in Subsidiary without Losing Control [Abstract]	Abstract			auo:DisclosureOfDisposalOfPartOfOwnershipInterestInSubsidiaryWithoutLosingControlAbstract
1191	Consideration received	Concept (Monetary)	For Period	Debit	auo:Disposalofpartofownershipinterestinsubsidiarywithoutlosingcontrolconsiderationreceived
1192	Carrying amount of the equity interest disposed of	Concept (Monetary)	For Period	Debit	auo:DisposalOfPartOfOwnershipInterestInSubsidiaryWithoutLosingControlConsiderationReceivedFromNoncontrollingInterests
1193	Capital surplus � changes in ownership interest of subsidiary	Concept (Monetary)	For Period	Debit	auo:DisposalOfPartOfOwnershipInterestInSubsidiaryWithoutLosingControlCapitalSurplusFromChangeInOwnershipOfSubsidiary
1194	Other equity � effect from foreign currency translation differences arising from foreign operations	Concept (Monetary)	For Period	Debit	auo:DisposalOfPartOfOwnershipInterestInSubsidiaryWithoutLosingControlotherEquityEffectFromForeignCurrencyTranslationDifferences
1195	Capital surplus � differences between consideration and carrying amount arising from disposal of interest in subsidiary	Concept (Monetary)	For Period	Debit	auo:DisposalOfPartOfOwnershipInterestInSubsidiaryWithoutLosingControldifferencesBetweenConsiderationAndCarryingAmountofSubsidiariesdisposedOf
1196	1125 - Disclosure - Disposal of Part of Ownership Interest in Subsidiary without Losing Control (Details Textual)	Network	*	*	http://auo.com/role/DisposalOfPartOfOwnershipInterestInSubsidiaryWithoutLosingControlDetailsTextual
1197	Implied Table	Table	*	*	implied:Table
1198	Disclosure Of Disposal of Part of Ownership Interest in Subsidiary without Losing Control [Abstract]	Abstract			auo:DisclosureOfDisposalOfPartOfOwnershipInterestInSubsidiaryWithoutLosingControlAbstract
1199	Proportion Of Subsidiary Ownership Percentage Sold	Concept (Percent)	For Period		auo:ProportionOfSubsidiaryOwnershipPercentageSold
1200	Total cash consideration received	Concept (Monetary)	For Period	Debit	auo:TotalCashConsiderationReceived
1201	1126 - Disclosure - Disposal of Subsidiaries (Details)	Network	*	*	http://auo.com/role/DisposalOfSubsidiariesDetails
1202	Disposal of Subsidiaries [Table]	Table	*	*	auo:DisposalOfSubsidiariesTable
1203	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1204	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1205	Buyer SSEC [Member]	Member			auo:BuyerStarShiningEnergyCorporationMember
1206	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1207	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1208	FGPC and TGPC [Member]	Member			auo:FGPCAndTGPCMember
1209	CGPC [Member]	Member			auo:CGPCMember
1210	Disposal of Subsidiaries [Line Items]	LineItems			auo:DisposalOfSubsidiariesLineItems
1211	Cash and cash equivalents	Concept (Monetary)	For Period	Debit	ifrs-full:CashAndCashEquivalentsInSubsidiaryOrBusinessesAcquiredOrDisposed2013
1212	Accounts receivable and other receivables	Concept (Monetary)	For Period	Debit	auo:AccountsReceivableAndOtherReceivablesInSubsidiaryOrBusinessesAcquiredOrDisposed
1213	Other current assets	Concept (Monetary)	For Period	Debit	auo:OtherCurrentAssetsInSubsidiaryOrBusinessesAcquiredOrDisposed
1214	Property, plant and equipment	Concept (Monetary)	For Period	Debit	auo:PropertyPlantAndEquipmentInSubsidiaryOrBusinessesAcquiredOrDisposed
1215	Other assets	Concept (Monetary)	For Period	Debit	auo:OtherAssetsInSubsidiaryOrBusinessesAcquiredOrDisposed
1216	Payable for equipments	Concept (Monetary)	For Period	Credit	auo:PayableForEquipmentInSubsidiaryOrBusinessesAcquiredOrDisposed
1217	Accrued expense and other current liabilities	Concept (Monetary)	For Period	Credit	auo:AccruedExpenseAndOtherCurrentLiabilitiesInSubsidiaryOrBusinessesAcquiredOrDisposed
1218	Long-term borrowings	Concept (Monetary)	For Period	Credit	auo:LongtermBorrowingsInSubsidiaryOrBusinessesAcquiredOrDisposed
1219	Net assets disposed of	Concept (Monetary)	For Period	Debit	auo:NetAssetsInSubsidiaryOrBusinessesAcquiredOrDisposed
1220	1127 - Disclosure - Disposal of Subsidiaries (Details Textual)	Network	*	*	http://auo.com/role/DisposalOfSubsidiariesDetailsTextual
1221	Disposal of Subsidiaries [Table]	Table	*	*	auo:DisposalOfSubsidiariesTable
1222	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1223	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1224	FGPC and TGPC [Member]	Member			auo:FGPCAndTGPCMember
1225	CGPC [Member]	Member			auo:CGPCMember
1226	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1227	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1228	Buyer SSEC [Member]	Member			auo:SsecMember
1229	Disposal of Subsidiaries [Line Items]	LineItems			auo:DisposalOfSubsidiariesLineItems
1230	Cash consideration received	Concept (Monetary)	For Period	Credit	ifrs-full:PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents
1231	Gains on disposal of subsidiaries	Concept (Monetary)	For Period	Credit	auo:GainsOnDisposalOfSubsidiaries
1232	1128 - Disclosure - Property, Plant and Equipment (Details)	Network	*	*	http://auo.com/role/PropertyPlantAndEquipmentDetails
1233	Disclosure Of Detailed Information About Property Plant And Equipment [Table]	Table	*	*	auo:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentTable
1234	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1235	Property, Plant and Equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
1236	Land [Member]	Member			ifrs-full:LandMember
1237	Buildings [member]	Member			ifrs-full:BuildingsMember
1238	Machinery and equipment [Member]	Member			auo:MachineryAndEquipmentsMember
1239	Other equipment [Member]	Member			auo:OtherEquipmentMember
1240	Prepayments for purchase of land and equipment, and construction in progress [Member]	Member			auo:PrepaymentsForPurchaseOfLandAndEquipmentAndConstructionInProgressMember
1241	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1242	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1243	Gross carrying amount [member]	Member			ifrs-full:GrossCarryingAmountMember
1244	Accumulated depreciation, amortisation and impairment [member]	Member			ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
1245	Disclosure Of Detailed Information About Property Plant And Equipment [Line Items]	LineItems			auo:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentLineItems
1246	Balance, Beginning of Year	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1247	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
1248	Disposal or write off	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsAndRetirementsPropertyPlantAndEquipment
1249	Reclassification and effect of change in exchange rate	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
1250	Balance, End of Year	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1251	1129 - Disclosure - Property, Plant and Equipment (Details Textual)	Network	*	*	http://auo.com/role/PropertyPlantAndEquipmentDetailsTextual
1252	Disclosure Of Detailed Information About Property Plant And Equipment [Table]	Table	*	*	auo:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentTable
1253	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1254	Property, Plant and Equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
1255	Non-irrigated farmland [Member]	Member			auo:NonirrigatedFarmlandMember
1256	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1257	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1258	AUSK [Member]	Member			auo:AUSKMember
1259	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1260	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1261	Segments [axis]	Axis			ifrs-full:SegmentsAxis
1262	Energy segment [Member]	Member			ifrs-full:SegmentsMember
1263	Display segment [Member]	Member			auo:DisplaySegmentMember
1264	Energy segment [Member]	Member			auo:EnergySegmentMember
1265	Individual assets or cash-generating units [axis]	Axis			ifrs-full:IndividualAssetsOrCashgeneratingUnitsAxis
1266	Entity's total for individual assets or cash-generating units [member]	Member			ifrs-full:EntitysTotalForIndividualAssetsOrCashgeneratingUnitsMember
1267	Range [Axis]	Axis			ifrs-full:RangeAxis
1268	Ranges [member]	Member			ifrs-full:RangesMember
1269	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
1270	Top of range [member]	Member			ifrs-full:TopOfRangeMember
1271	Disclosure Of Detailed Information About Property Plant And Equipment [Line Items]	LineItems			auo:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentLineItems
1272	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
1273	Proceeds from sales of property, plant and equipment, classified as investing activities	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
1274	Impairment loss recognised in profit or loss, property, plant and equipment	Concept (Monetary)	For Period		ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
1275	Borrowing costs capitalised	Concept (Monetary)	For Period		ifrs-full:BorrowingCostsCapitalised
1276	Capitalisation rate of borrowing costs eligible for capitalisation	Concept (Percent)	For Period		ifrs-full:CapitalisationRateOfBorrowingCostsEligibleForCapitalisation
1277	Gains on disposals of property, plant and equipment	Concept (Monetary)	For Period	Credit	ifrs-full:GainsOnDisposalsOfPropertyPlantAndEquipment
1278	1130 - Disclosure - Investment Property (Details)	Network	*	*	http://auo.com/role/InvestmentPropertyDetails
1279	Disclosure of detailed information about investment property [table]	Table	*	*	ifrs-full:DisclosureOfInvestmentPropertyTable
1280	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
1281	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
1282	At cost [member]	Member			ifrs-full:AtCostMember
1283	At fair value [member]	Member			ifrs-full:AtFairValueMember
1284	Disclosure of detailed information about investment property [line items]	LineItems			ifrs-full:DisclosureOfInvestmentPropertyLineItems
1285	Balance, Beginning of Year	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentProperty
1286	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsInvestmentProperty
1287	Disposal	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsInvestmentProperty
1288	Reclassification and effect of change in exchange rate	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesInvestmentProperty
1289	Balance, End of Year	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentProperty
1290	1131 - Disclosure - Investment Property (Details Textual)	Network	*	*	http://auo.com/role/InvestmentPropertyDetailsTextual
1291	Implied Table	Table	*	*	implied:Table
1292	Disclosure of detailed information about investment property [abstract]	Abstract			ifrs-full:DisclosureOfInvestmentPropertyAbstract
1293	Transfer from property, plant and equipment to investment property	Concept (Monetary)	For Period	Credit	auo:TransferFromPropertyPlantAndEquipmentToInvestmentProperty
1294	Capitalization rate, Significant Unabservable Inputs Assets	Concept (Percent)	For Period		auo:CapitalizationRateSignificantUnabservableInputsAssets
1295	Overall capital interest rate, significant unobservable inputs, assets	Concept (Percent)	For Period		ifrs-full:InterestRateSignificantUnobservableInputsAssets
1296	Rate of return, significant unobservable inputs, assets	Concept (Percent)	For Period		auo:RateOfReturnSignificantUnabservableInputsAssets
1297	1132 - Disclosure - Intangible Assets (Details)	Network	*	*	http://auo.com/role/IntangibleAssetsDetails
1298	Disclosure of detailed information about intangible assets [table]	Table	*	*	ifrs-full:DisclosureOfIntangibleAssetsTable
1299	Classes of intangible assets other than goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
1300	Intangible assets other than goodwill [member]	Member			ifrs-full:IntangibleAssetsOtherThanGoodwillMember
1301	Patent and technology fee [Member]	Member			auo:PatentAndTechnologyFeeMember
1302	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1303	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
1304	Gross carrying amount [member]	Member			ifrs-full:GrossCarryingAmountMember
1305	Accumulated depreciation, amortisation and impairment [member]	Member			ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
1306	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
1307	Intangible assets and goodwill [member]	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
1308	Goodwill [Member]	Member			ifrs-full:GoodwillMember
1309	Other Intangible Assets [Member]	Member			ifrs-full:OtherIntangibleAssetsMember
1310	Disclosure of detailed information about intangible assets [line items]	LineItems			ifrs-full:DisclosureOfIntangibleAssetsLineItems
1311	Balance, Beginning of Year	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
1312	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
1313	Effect of change in consolidated entities	Concept (Monetary)	For Period	Debit	ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill
1314	Effect of change in exchange rate	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill
1315	Balance, End of Year	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsAndGoodwill
1316	1133 - Disclosure - Intangible Assets (Details 1)	Network	*	*	http://auo.com/role/IntangibleAssetsDetails1
1317	Disclosure of detailed information about intangible assets [table]	Table	*	*	ifrs-full:DisclosureOfIntangibleAssetsTable
1318	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
1319	Intangible assets and goodwill [member]	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
1320	Goodwill [Member]	Member			ifrs-full:GoodwillMember
1321	Disclosure of detailed information about intangible assets [line items]	LineItems			ifrs-full:DisclosureOfIntangibleAssetsLineItems
1322	Display business	Concept (Monetary)	As Of	Debit	ifrs-full:GoodwillExpectedDeductibleForTaxPurposes
1323	1134 - Disclosure - Intangible Assets (Details Textual)	Network	*	*	http://auo.com/role/IntangibleAssetsDetailsTextual
1324	Disclosure of detailed information about intangible assets [table]	Table	*	*	ifrs-full:DisclosureOfIntangibleAssetsTable
1325	Classes of intangible assets and goodwill [axis]	Axis			ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
1326	Intangible assets and goodwill [member]	Member			ifrs-full:IntangibleAssetsAndGoodwillMember
1327	Disclosure of detailed information about intangible assets [line items]	LineItems			ifrs-full:DisclosureOfIntangibleAssetsLineItems
1328	Description of key assumptions on which management has based cash flow projections	Concept (Text/String)	For Period		ifrs-full:DescriptionOfKeyAssumptionsOnWhichManagementHasBasedCashFlowProjections
1329	1135 - Disclosure - Other Current Assets and Other Noncurrent Assets (Details)	Network	*	*	http://auo.com/role/OtherCurrentAssetsAndOtherNoncurrentAssetsDetails
1330	Other Current Assets and Other Noncurrent Assets [Table]	Table	*	*	auo:OtherCurrentAssetsAndOtherNoncurrentAssetsTable
1331	Classes of assets [axis]	Axis			ifrs-full:ClassesOfAssetsAxis
1332	Assets [member]	Member			ifrs-full:ClassesOfAssetsMember
1333	Prepayment for equipment [Member]	Member			auo:PrepaymentForEquipmentMember
1334	Refundable and overpaid tax [Member]	Member			auo:RefundableAndOverpaidTaxMember
1335	Long-term prepaid rents [Member]	Member			auo:LongtermPrepaidRentsMember
1336	Prepayments for purchases [Member]	Member			auo:PrepaymentsForPurchasesMember
1337	Long-term receivables [Member]	Member			auo:LongTermReceivablesMember
1338	Refundable deposits [Member]	Member			auo:RefundableDepositsMember
1339	Others [Member]	Member			auo:OthersMember
1340	Other Current Assets and Other Noncurrent Assets [Line Items]	LineItems			auo:OtherCurrentAssetsAndOtherNoncurrentAssetsLineItems
1341	Other Assets	Concept (Monetary)	As Of	Debit	ifrs-full:OtherAssets
1342	Less: current	Concept (Monetary)	As Of	Debit	ifrs-full:OtherCurrentAssets
1343	Noncurrent	Concept (Monetary)	As Of	Debit	ifrs-full:OtherNoncurrentAssets
1344	1136 - Disclosure - Short-term Borrowings (Details)	Network	*	*	http://auo.com/role/ShortTermBorrowingsDetails
1345	Disclosure of detailed information about short term borrowings [Table]	Table	*	*	auo:DisclosureOfDetailedInformationAboutShortTermBorrowingsTable
1346	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
1347	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
1348	Short term borrowings [Member]	Member			auo:ShortTermBorrowingsMember
1349	Unsecured Borrowings [Member]	Member			auo:UnsecuredBorrowingsMember
1350	Unused Credit Facility [Member]	Member			auo:UnusedCreditFacilityMember
1351	Range [Axis]	Axis			ifrs-full:RangeAxis
1352	Ranges [member]	Member			ifrs-full:RangesMember
1353	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
1354	Top of range [member]	Member			ifrs-full:TopOfRangeMember
1355	Disclosure of detailed information about short term borrowings [Line Items]	LineItems			auo:DisclosureOfDetailedInformationAboutShortTermBorrowingsLineItems
1356	Short-term Borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:ShorttermBorrowings
1357	Unused credit facility	Concept (Monetary)	As Of	Credit	ifrs-full:UndrawnBorrowingFacilities
1358	Interest rate	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
1359	1137 - Disclosure - Long-term Borrowings (Details)	Network	*	*	http://auo.com/role/LongTermBorrowingsDetails
1360	Disclosure of detailed information about long term borrowings [Table]	Table	*	*	auo:DisclosureOfDetailedInformationAboutLongTermBorrowingsTable
1361	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1362	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1363	Repayment duration From Feb. 2015 to Aug. 2019 [member]	Member			auo:MaturityPeriodOneMember
1364	Repayment duration from Apr. 2016 to Apr. 2021 [member]	Member			auo:MaturityPeriodTwoMember
1365	Repayment duration from May 2017 to May 2022 [member]	Member			auo:MaturityPeriodThreeMember
1366	Repayment duration From Jul. 2018 to Jul. 2023 [member]	Member			auo:MaturityPeriodFourMember
1367	Repayment duration From Feb. 2016 to Jan. 2019 [member]	Member			auo:MaturityPeriodFiveMember
1368	Repayment duration From Nov. 2015 to Nov. 2023 [member]	Member			auo:MaturityPeriodSixMember
1369	Repayment duration From May 2016 to Aug. 2023 [member]	Member			auo:MaturityPeriodSevenMember
1370	Repayment duration From Apr. 2017 to Apr. 2032 [member]	Member			auo:MaturityPeriodEightMember
1371	Range [Axis]	Axis			ifrs-full:RangeAxis
1372	Ranges [member]	Member			ifrs-full:RangesMember
1373	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
1374	Top of range [member]	Member			ifrs-full:TopOfRangeMember
1375	Liabilities arising from financing activities [axis]	Axis			ifrs-full:LiabilitiesArisingFromFinancingActivitiesAxis
1376	Liabilities arising from financing activities [member]	Member			ifrs-full:LiabilitiesArisingFromFinancingActivitiesMember
1377	Long-term borrowings [member]	Member			ifrs-full:LongtermBorrowingsMember
1378	Classes of financial instruments [axis]	Axis			ifrs-full:ClassesOfFinancialInstrumentsAxis
1379	Financial instruments, class [member]	Member			ifrs-full:ClassesOfFinancialInstrumentsMember
1380	Syndicated loans [Member]	Member			auo:SyndicatedLoansMember
1381	Unsecured Loans [Member]	Member			auo:UnsecuredLoansMember
1382	secured Loans [Member]	Member			auo:SecuredLoansMember
1383	Disclosure of detailed information about long term borrowings [Line Items]	LineItems			auo:DisclosureOfDetailedInformationAboutLongTermBorrowingsLineItems
1384	Current and Non current portion of long term barrowings	Concept (Monetary)	As Of	Credit	auo:CurrentAndNonCurrentPortionOfLongTermBarrowings
1385	Less: transaction costs	Concept (Monetary)	As Of	Debit	auo:UnamortizedBorrowingCosts
1386	Borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
1387	Less: current portion	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentPortionOfLongtermBorrowings
1388	Non-current portion of non-current borrowings	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
1389	Borrowings, interest rate	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
1390	Unused credit facility	Concept (Monetary)	As Of	Credit	ifrs-full:UndrawnBorrowingFacilities
1391	1138 - Disclosure - Long-term Borrowings (Details 1)	Network	*	*	http://auo.com/role/LongTermBorrowingsDetails1
1392	Disclosure of reconciliation of liabilities to cash flows arising from financing activities [Table]	Table	*	*	auo:DisclosureOfReconciliationOfLiabilitiesToCashFlowsArisingFromFinancingActivitiesTable
1393	Liabilities Arising From Financing Activitie [axis]	Axis			auo:LiabilitiesArisingFromFinancingActivitieAxis
1394	Liabilities Arising From Financing Activitie [domain]	Member			auo:LiabilitiesArisingFromFinancingActivitieDomain
1395	Short-term borrowings	Member			auo:ShorttermBorrowingMember
1396	Long-term borrowings	Member			auo:LongtermBorrowing1Member
1397	Guarantee deposits	Member			auo:GuaranteeDepositsMember
1398	Disclosure of reconciliation of liabilities to cash flows arising from financing activities [Line Items]	LineItems			auo:DisclosureOfReconciliationOfLiabilitiesToCashFlowsArisingFromFinancingActivitiesLineItems
1399	Balance at Beginning	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesArisingFromFinancingActivities
1400	Cash flows	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughFinancingCashFlowsLiabilitiesArisingFromFinancingActivities
1401	Non-cash changes, Changes in exchange rate	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities
1402	Non-cash changes, Effect of change in consolidated entities	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughObtainingOrLosingControlOfSubsidiariesOrOtherBusinessesLiabilitiesArisingFromFinancingActivities
1403	Non-cash changes, Amortization on transaction costs	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities
1404	Balance at Ending	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesArisingFromFinancingActivities
1405	1139 - Disclosure - Provisions (Details)	Network	*	*	http://auo.com/role/ProvisionsDetails
1406	Disclosure of movements in provisions [Table]	Table	*	*	auo:DisclosureOfMovementsInProvisionsTable
1407	Classes of other provisions [axis]	Axis			ifrs-full:ClassesOfProvisionsAxis
1408	Other provisions [member]	Member			ifrs-full:OtherProvisionsMember
1409	Warranties [member]	Member			ifrs-full:WarrantyProvisionMember
1410	Litigation and claims [member]	Member			ifrs-full:LegalProceedingsProvisionMember
1411	Others [member]	Member			ifrs-full:MiscellaneousOtherProvisionsMember
1412	Disclosure of movements in provisions [Line Items]	LineItems			auo:DisclosureOfMovementsInProvisionsLineItems
1413	Balance at beginning of the year	Concept (Monetary)	As Of	Credit	ifrs-full:OtherProvisions
1414	Additions	Concept (Monetary)	For Period	Credit	ifrs-full:AdditionalProvisionsOtherProvisions
1415	Usage	Concept (Monetary)	For Period	Debit	ifrs-full:ProvisionUsedOtherProvisions
1416	Reversals	Concept (Monetary)	For Period	Debit	ifrs-full:UnusedProvisionReversedOtherProvisions
1417	Effect of change in exchange rate	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions
1418	Balance at end of the year	Concept (Monetary)	As Of	Credit	ifrs-full:OtherProvisions
1419	Less: current	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentProvisions
1420	Noncurrent	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentProvisions
1421	1140 - Disclosure - Operating Leases (Details)	Network	*	*	http://auo.com/role/OperatingLeasesDetails
1422	Disclosure of non-cancellable lease payments [table]	Table	*	*	auo:DisclosureOfNoncancellableLeasePaymentsTable
1423	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1424	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1425	Less than one year [Member]	Member			ifrs-full:NotLaterThanOneYearMember
1426	Between one and five years [Member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1427	More than five years [Member]	Member			ifrs-full:LaterThanFiveYearsMember
1428	Disclosure of non-cancellable lease payments [line Items]	LineItems			auo:DisclosureOfNoncancellableLeasePaymentsLineItems
1429	Minimum lease payments payable under non-cancellable operating lease	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
1430	1141 - Disclosure - Operating Leases (Details 1)	Network	*	*	http://auo.com/role/OperatingLeasesDetails1
1431	Disclosure of non-cancellable lease receivables [table]	Table	*	*	auo:DisclosureOfNoncancellableLeaseReceivablesTable
1432	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1433	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1434	Less than one year [Member]	Member			ifrs-full:NotLaterThanOneYearMember
1435	Between one and five years [Member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1436	More than five years [Member]	Member			ifrs-full:LaterThanFiveYearsMember
1437	Disclosure of non-cancellable lease receivables [line Items]	LineItems			auo:DisclosureOfNoncancellableLeaseReceivablesLineItems
1438	Minimum lease payments receivable under non-cancellable operating lease	Concept (Monetary)	As Of	Debit	ifrs-full:MinimumLeasePaymentsReceivableUnderNoncancellableOperatingLease
1439	1142 - Disclosure - Operating Leases (Details Textual)	Network	*	*	http://auo.com/role/OperatingLeasesDetailsTextual
1440	Disclosure of finance lease and operating lease by lessee [table]	Table	*	*	ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
1441	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
1442	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
1443	Hsinchu Science Park Administration Bureau [Member]	Member			auo:HsinchuScienceParkAdministrationBureauMember
1444	Disclosure of operating leases [Line Items]	LineItems			auo:DisclosureOfOperatingLeasesLineItems
1445	Description of material leasing arrangements by lessee classified as operating lease	Concept (Text/String)	For Period		ifrs-full:DescriptionOfMaterialLeasingArrangementsByLesseeClassifiedAsOperatingLease
1446	Lease and sublease payments recognised as expense	Concept (Monetary)	For Period	Debit	ifrs-full:LeaseAndSubleasePaymentsRecognisedAsExpense
1447	Repairs and maintenance expense, recognized by the lessor	Concept (Monetary)	For Period	Debit	ifrs-full:RepairsAndMaintenanceExpense
1448	1143 - Disclosure - Employee Benefits (Details)	Network	*	*	http://auo.com/role/EmployeeBenefitsDetails
1449	Disclosure of reconciliation for net defined benefit liability and its components [Table]	Table	*	*	auo:DisclosureOfReconciliationForNetDefinedBenefitLiabilityAndItsComponentsTable
1450	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
1451	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
1452	Defined benefit plans [member]	Member			auo:DefinedBenefitPensionPlansMember
1453	Disclosure of reconciliation for net defined benefit liability and its components [Line Items]	LineItems			auo:DisclosureOfReconciliationForNetDefinedBenefitLiabilityAndItsComponentsLineItems
1454	Present value of defined benefit obligation	Concept (Monetary)	As Of	Credit	ifrs-full:DefinedBenefitObligationAtPresentValue
1455	Fair value of plan assets	Concept (Monetary)	As Of	Debit	ifrs-full:PlanAssetsAtFairValue
1456	Net defined benefit liability	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1457	1144 - Disclosure - Employee Benefits (Details 1)	Network	*	*	http://auo.com/role/EmployeeBenefitsDetails1
1458	Disclosure of reconciliation for net defined benefit liability and its components [Table]	Table	*	*	auo:DisclosureOfReconciliationForNetDefinedBenefitLiabilityAndItsComponentsTable
1459	Net defined benefit liability (asset) [axis]	Axis			ifrs-full:NetDefinedBenefitLiabilityAssetAxis
1460	Net defined benefit liability (asset) [member]	Member			ifrs-full:NetDefinedBenefitLiabilityAssetMember
1461	Defined benefit obligation [member]	Member			ifrs-full:PresentValueOfDefinedBenefitObligationMember
1462	Fair value of plan assets [member]	Member			ifrs-full:PlanAssetsMember
1463	Net defined benefit asset (liability) [Member]	Member			auo:NetDefinedBenefitAssetLiabilityMember
1464	Net defined benefit asset (liability)	LineItems			auo:DisclosureOfReconciliationForNetDefinedBenefitLiabilityAndItsComponentsLineItems
1465	Balance at beginning	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1466	Included in profit or loss	Abstract			auo:DefinedBenefitPlanIncludedInProfitLossAbstract
1467	Service cost	Concept (Monetary)	For Period	Credit	ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1468	Interest cost	Concept (Monetary)	For Period	Credit	ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1469	Expected return on plan assets	Concept (Monetary)	For Period	Debit	ifrs-full:ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset
1470	Subtotal in profit or loss	Concept (Monetary)	For Period	Credit	auo:DefinedBenefitPlanIncludedInProfitLoss
1471	Included in other comprehensive income	Abstract			auo:DefinedBenefitPlanIncludedInOtherComprehensiveIncomeAbstract
1472	Actuarial (loss) gain arising from demographic assumptions	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset
1473	Actuarial (loss) gain arising from financial assumptions	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
1474	Actuarial (loss) gain arising from experience adjustment	Concept (Monetary)	For Period	Debit	ifrs-full:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset
1475	Return on plan assets excluding interest income	Concept (Monetary)	For Period	Debit	auo:ReturnOnPlanAssetsExcludingInterestIncomeNetDefinedBenefitLiabilityAsset
1476	Subtotal in other comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
1477	Other changes	Abstract			auo:DefinedBenefitPlanOtherAbstract
1478	Contributions paid by the employer	Concept (Monetary)	For Period	Debit	ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset
1479	Benefits paid	Concept (Monetary)	For Period	Debit	ifrs-full:PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset
1480	Effect of changes in exchange rates and others	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset
1481	Subtotal of other changes	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
1482	Balance at ending	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1483	1145 - Disclosure - Employee Benefits (Details 2)	Network	*	*	http://auo.com/role/EmployeeBenefitsDetails2
1484	Disclosure of principal actuarial assumptions [Table]	Table	*	*	auo:DisclosureOfPrincipalActuarialAssumptionsTable
1485	Range [Axis]	Axis			ifrs-full:RangeAxis
1486	Ranges [member]	Member			ifrs-full:RangesMember
1487	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
1488	Top of range [member]	Member			ifrs-full:TopOfRangeMember
1489	Disclosure of principal actuarial assumptions [Line Items]	LineItems			auo:DisclosureOfPrincipalActuarialAssumptionsLineItems
1490	Discount rate	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfDiscountRates
1491	Rate of increase in future salary	Concept (Percent)	As Of		ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
1492	1146 - Disclosure - Employee Benefits (Details 3)	Network	*	*	http://auo.com/role/EmployeeBenefitsDetails3
1493	Disclosure of affected defined benefit obligation amount with changes in assumptions	Table	*	*	auo:DisclosureOfAffectedDefinedBenefitObligationByAmountsTable
1494	Actuarial assumptions [axis]	Axis			ifrs-full:ActuarialAssumptionsAxis
1495	Actuarial assumptions [member]	Member			ifrs-full:ActuarialAssumptionsMember
1496	Actuarial assumption of discount rates [member]	Member			ifrs-full:ActuarialAssumptionOfDiscountRatesMember
1497	Actuarial assumption of expected rates of salary increases [member]	Member			ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreasesMember
1498	Types Of Currency [Axis]	Axis			auo:TypesOfCurrencyAxis
1499	Types Of Currency [Domain]	Member			auo:TypesOfCurrencyDomain
1500	Disclosure of affected defined benefit obligation amount with changes in assumptions	LineItems			auo:DisclosureOfAffectedDefinedBenefitObligationByAmountsLineItems
1501	Increase (decrease) in defined benefit obligation due to 0.25% increase in actuarial assumption	Concept (Monetary)	As Of	Credit	ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption
1502	Increase (decrease) in defined benefit obligation due to 0.25% decrease in actuarial assumption	Concept (Monetary)	As Of	Credit	ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption
1503	1147 - Disclosure - Employee Benefits (Details Textual)	Network	*	*	http://auo.com/role/EmployeeBenefitsDetailsTextual
1504	Disclosure Of Employee Benefits Explanatory [Table]	Table	*	*	auo:DisclosureOfEmployeeBenefitsExplanatoryTable
1505	Defined benefit plans [axis]	Axis			ifrs-full:DefinedBenefitPlansAxis
1506	Defined benefit plans [member]	Member			ifrs-full:DefinedBenefitPlansMember
1507	Domestic defined contribution plans [member]	Member			auo:DefinedBenefitPlansDomesticMember
1508	Overseas defined contribution plans [Member]	Member			auo:DefinedBenefitPlansForeignMember
1509	Disclosure Of Employee Benefits Explanatory [Line Items]	LineItems			auo:DisclosureOfEmployeeBenefitsExplanatoryLineItems
1510	Assets of benefit plan	Concept (Monetary)	As Of	Debit	ifrs-full:AssetsOfBenefitPlan
1511	Estimate of contributions expected to be paid to plan for next annual reporting period	Concept (Monetary)	For Period	Credit	ifrs-full:EstimateOfContributionsExpectedToBePaidToPlan
1512	Employee benefits expense	Concept (Monetary)	For Period	Debit	ifrs-full:EmployeeBenefitsExpense
1513	1148 - Disclosure - Capital and Other Components of Equity (Details)	Network	*	*	http://auo.com/role/CapitalAndOtherComponentsOfEquityDetails
1514	Disclosure of balance of capital surplus [Table]	Table	*	*	auo:DisclosureOfBalanceOfCapitalSurplusTable
1515	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
1516	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
1517	From common stock	Member			ifrs-full:OrdinarySharesMember
1518	Miscellaneous Component Of Equity [axis]	Axis			auo:MiscellaneousComponentOfEquityAxis
1519	Miscellaneous Component Of Equity [Domain]	Member			auo:MiscellaneousComponentOfEquityDomain
1520	From convertible bonds	Member			ifrs-full:ReserveOfEquityComponentOfConvertibleInstrumentsMember
1521	From others	Member			ifrs-full:MiscellaneousOtherReservesMember
1522	Disclosure of balance of capital surplus [Line Items]	LineItems			auo:DisclosureOfBalanceOfCapitalSurplusLineItems
1523	Capital surplus	Concept (Monetary)	As Of	Credit	ifrs-full:SharePremium
1524	1149 - Disclosure - Capital and Other Components of Equity (Details 1)	Network	*	*	http://auo.com/role/CapitalAndOtherComponentsOfEquityDetails1
1525	Implied Table	Table	*	*	implied:Table
1526	Disclosure of distribution of earnings [Abstract]	Abstract			auo:DisclosureOfDistributionOfEarningsAbstract
1527	Legal reserve	Concept (Monetary)	For Period	Credit	auo:IncreaseDecreaseThroughTransferToLegalReserve
1528	Special reserve	Concept (Monetary)	For Period	Credit	auo:IncreaseDecreaseThroughTransferToSpecialReserve
1529	Cash dividends to shareholders	Concept (Monetary)	For Period		ifrs-full:DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwners
1530	Cash dividends to shareholders, per share	Concept (Share)	For Period		ifrs-full:DividendsPaidOrdinarySharesPerShare
1531	Appropriation Of Earnings	Concept (Monetary)	For Period	Debit	auo:AppropriationOfEarnings
1532	1150 - Disclosure - Capital and Other Components of Equity (Details 2)	Network	*	*	http://auo.com/role/CapitalAndOtherComponentsOfEquityDetails2
1533	Disclosure other components of equity [Table]	Table	*	*	auo:DisclosureOtherComponentsOfEquityTable
1534	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
1535	Equity [Member]	Member			ifrs-full:EquityMember
1536	Cumulative translation differences	Member			ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
1537	Unrealized gains (losses) on available-for-sale financial assets	Member			ifrs-full:ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssetsMember
1538	Unrealized gains (losses) on cash flow hedges	Member			ifrs-full:ReserveOfGainsAndLossesOnHedgingInstrumentsThatHedgeInvestmentsInEquityInstrumentsMember
1539	Unrealized gains (losses) on financial assets at FVTOCI	Member			ifrs-full:ReserveOfGainsAndLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember
1540	Miscellaneous Component Of Equity [axis]	Axis			auo:MiscellaneousComponentOfEquityAxis
1541	Miscellaneous Component Of Equity [Domain]	Member			auo:MiscellaneousComponentOfEquityDomain
1542	AOCI Attributable to Parent [Member]	Member			ifrs-full:AccumulatedOtherComprehensiveIncomeMember
1543	Disclosure of other components of equity [Line Items]	LineItems			auo:DisclosureOfOtherComponentsOfEquityLineItems
1544	Balance beginning	Concept (Monetary)	As Of	Credit	ifrs-full:OtherReserves
1545	Adjustments on initial application of new standards	Concept (Monetary)	For Period	Credit	auo:NewAccountingPronouncementOrChangeInAccountingPrinciplesEffectOfAdoptionQuantification
1546	Foreign operations - foreign currency translation differences	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationBeforeTax
1547	Net change in fair value of financial assets at FVTOCI	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeBeforeTax
1548	Effective portion of changes in fair value of cash flow hedges	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnCashFlowHedgesBeforeTax
1549	Net change in fair value of available-for-sale financial assets	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnRemeasuringAvailableforsaleFinancialAssetsBeforeTax
1550	Equity-accounted investees - share of other comprehensive income	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodBeforeTax
1551	Realized gain on sales of securities reclassified to profit or loss	Concept (Monetary)	For Period	Debit	ifrs-full:ReclassificationAdjustmentsOnAvailableforsaleFinancialAssetsBeforeTax
1552	Cumulative unrealized loss of equity instruments transferred to retained earnings due to disposal	Concept (Monetary)	For Period	Credit	ifrs-full:CumulativeGainLossOnDisposalOfInvestmentsInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncome
1553	Group reorganization	Concept (Monetary)	For Period	Credit	auo:IncreaseDecreaseInEquityResultingFromGroupReorganization
1554	Related tax	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss
1555	Balance ending	Concept (Monetary)	As Of	Credit	ifrs-full:OtherReserves
1556	1151 - Disclosure - Capital and Other Components of Equity (Details 3)	Network	*	*	http://auo.com/role/CapitalAndOtherComponentsOfEquityDetails3
1557	Implied Table	Table	*	*	implied:Table
1558	Disclosure of Non-controlling interests, net of tax [Abstract]	Abstract			auo:DisclosureOfNoncontrollingInterestsNetOfTaxAbstract
1559	Balance at the beginning of the year	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
1560	Equity attributable to non-controlling interests:	Abstract			auo:EquityAttributableToNoncontrollingInterestsAbstract
1561	Loss for the year	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToNoncontrollingInterests
1562	Adjustment of changes in ownership of investees	Concept (Monetary)	For Period	Debit	auo:AdjustmentOfChangesInOwnershipOfNoncontrollingInterests
1563	Foreign currency translation differences	Concept (Monetary)	For Period	Credit	auo:ForeignCurrencyTranslationDifferencesAttributableToNoncontrollingInterest
1564	Unrealized loss on financial assets at FVTOCI	Concept (Monetary)	For Period	Credit	auo:UnrealizedGainsLossesOnFinancialAssetsMeasuredAtFVTOCIAttributableToNoncontrollingInterest
1565	Remeasurement of defined benefit plans	Concept (Monetary)	For Period	Credit	auo:RemeasurementOfDefinedBenefitPlansAttributableToNoncontrollingInterests
1566	Group reorganization	Concept (Monetary)	For Period	Debit	auo:GroupReorganizationAttributableToNoncontrollingInterest
1567	Effect of disposal of interest in subsidiary to non-controlling interests	Concept (Monetary)	For Period	Credit	auo:EffectOfDisposalOfInterestInSubsidiaryToNoncontrollingInterests
1568	Effect of acquisition of non-controlling interests	Concept (Monetary)	For Period	Credit	auo:EffectOfAcquisitionOfNoncontrollingInterests
1569	Redemption of subsidiary treasury shares	Concept (Monetary)	For Period	Credit	auo:RedemptionOfSubsidiaryTreasurySharesAttributableToNoncontrollingInterest
1570	Others	Concept (Monetary)	For Period	Credit	auo:NoncontrollingInterestsOtherAdjustments
1571	Balance at the end of the year	Concept (Monetary)	As Of	Credit	ifrs-full:NoncontrollingInterests
1572	1152 - Disclosure - Capital and Other Components of Equity (Details Textual)	Network	*	*	http://auo.com/role/CapitalAndOtherComponentsOfEquityDetailsTextual
1573	Disclosure of Capital and Other Components of Equity [Table]	Table	*	*	auo:DisclosureOfCapitalAndOtherComponentsOfEquityTable
1574	Classes of share capital [axis]	Axis			ifrs-full:ClassesOfShareCapitalAxis
1575	Share capital [member]	Member			ifrs-full:ClassesOfShareCapitalMember
1576	American Depositary Shares (one represents ten common shares) [member]	Member			auo:AmericanDepositarySharesOneRepresentsTenCommonSharesMember
1577	Disclosure Of Capital And Other Components Of Equity [Line Items]	LineItems			auo:DisclosureOfCapitalAndOtherComponentsOfEquityLineItems
1578	Par value per share	Concept (Share)	As Of		ifrs-full:ParValuePerShare
1579	Authorized capital	Concept (Monetary)	As Of	Credit	auo:AuthorizedCapital
1580	Issued capital	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
1581	Number of shares issued	Concept (Shares)	As Of		ifrs-full:NumberOfSharesIssued
1582	Capital Surplus Capitalized Rate	Concept (Percent)	As Of		auo:CapitalSurplusCapitalizedRate
1583	Legal Reserve Distribution Description	Concept (Text/String)	For Period		auo:LegalReserveDistributionDescription
1584	Description of distribution of earnings and dividend policy	Concept (Text/String)	For Period		auo:DescriptionOfDistributionOfEarningsAndDividendPolicy
1585	Number of ordinary shares represented	Concept (Shares)	As Of		auo:NumberOfOrdinarySharesRepresented
1586	1153 - Disclosure - Share-based Payments (Details)	Network	*	*	http://auo.com/role/ShareBasedPaymentsDetails
1587	Disclosure of outstanding stock options [Table]	Table	*	*	auo:DisclosureOfOutstandingStockOptionsTable
1588	Plan Names [axis]	Axis			auo:PlanNamesAxis
1589	Plan Names [Domain]	Member			auo:PlanNamesDomain
1590	Employee Stock Option Plan 2011 [member]	Member			auo:EmployeeStockOptionPlan2011Member
1591	Option Plans [Axis]	Axis			auo:OptionPlansAxis
1592	Option Plans [Domain]	Member			auo:OptionPlansDomain
1593	DPTW Option Plan [Member]	Member			auo:DptwOptionPlanMember
1594	Disclosure of outstanding stock options [Line Items]	LineItems			auo:DisclosureOfOutstandingStockOptionsLineItems
1595	Weighted-average exercise price (per share), Outstanding Beggining balance	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1596	Weighted average exercise price (per share), Options expired	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsExpiredInSharebasedPaymentArrangement
1597	Weighted-average exercise price (per share), Outstanding Beggining balance	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1598	Number of options, Outstanding Beggining balance	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1599	Number of options, Options expired	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsExpiredInSharebasedPaymentArrangement
1600	Number of options, Outstanding at Ending balance	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1601	Number of options, Exercisable at Ending balance	Concept (Decimal)	As Of		ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
1602	1154 - Disclosure - Share-based Payments (Details 1)	Network	*	*	http://auo.com/role/ShareBasedPaymentsDetails1
1603	Disclosure of terms and conditions relating to employee stock option plan [Table]	Table	*	*	auo:DisclosureOfTermsAndConditionsRelatingToEmployeeStockOptionPlanTable
1604	Plan Names [axis]	Axis			auo:PlanNamesAxis
1605	Plan Names [Domain]	Member			auo:PlanNamesDomain
1606	Employee Stock Option Plan 2014 [member]	Member			auo:EmployeeStockOptionPlan2014Member
1607	Option Plan [Axis]	Axis			auo:OptionPlanAxis
1608	Option Plans [Domain]	Member			auo:OptionPlansDomain
1609	ACTW Option Plan [Member]	Member			auo:ActwOptionPlanMember
1610	Disclosure of terms and conditions relating to employee stock option plan [Line Items]	LineItems			auo:DisclosureOfTermsAndConditionsRelatingToEmployeeStockOptionPlanLineItems
1611	Grant date	Concept (Text/String)	For Period		ifrs-full:DateOfGrantOfSharebasedPaymentArrangement
1612	Total number of options issued (units)	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
1613	Contractual life of options	Concept (Text/String)	For Period		auo:WeightedAverageRemainingContractualLifeOfShareOptionsIssued
1614	Exercisable period	Concept (Text/String)	For Period		auo:ShareBasedArrangementsExercisablePeriodShareOptionsIssued
1615	Exercise price (per share)	Concept (Monetary)	As Of		ifrs-full:ExercisePriceOfOutstandingShareOptions
1616	1155 - Disclosure - Share-based Payments (Details 2)	Network	*	*	http://auo.com/role/ShareBasedPaymentsDetails2
1617	Disclosure of valuation information [Table]	Table	*	*	auo:DisclosureOfValuationInformationTable
1618	Plan Names [axis]	Axis			auo:PlanNamesAxis
1619	Plan Names [Domain]	Member			auo:PlanNamesDomain
1620	Employee Stock Option Plan 2014 [member]	Member			auo:EmployeeStockOptionPlan2014Member
1621	Option Plans [Axis]	Axis			auo:OptionPlansAxis
1622	Option Plans [Domain]	Member			auo:OptionPlansDomain
1623	ACTW Option Plan [Member]	Member			auo:ActwOptionPlanMember
1624	Disclosure of valuation information [Line Items]	LineItems			auo:DisclosureOfValuationInformationLineItems
1625	Expected volatility	Concept (Percent)	For Period		ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
1626	Risk-free interest rate	Concept (Percent)	For Period		ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted
1627	Expected duration (in years)	Concept (Decimal)	For Period		ifrs-full:DescriptionOfOptionLifeShareOptionsGranted
1628	Fair value at the grant date (per unit)	Concept (Monetary)	As Of	Credit	ifrs-full:WeightedAverageFairValueAtMeasurementDateShareOptionsGranted
1629	1156 - Disclosure - Share-based Payments (Details 3)	Network	*	*	http://auo.com/role/ShareBasedPaymentsDetails3
1630	Disclosure of outstanding stock options [Table]	Table	*	*	auo:DisclosureOfOutstandingStockOptionsTable
1631	Option Plans [Axis]	Axis			auo:OptionPlansAxis
1632	Option Plans [Domain]	Member			auo:OptionPlansDomain
1633	ACTW Option Plan [Member]	Member			auo:ActwOptionPlanMember
1634	Plan Names [Axis]	Axis			auo:PlanNamesAxis
1635	Plan Names [Domain]	Member			auo:PlanNamesDomain
1636	Employee Stock Option Plan 2014 [Member]	Member			auo:EmployeeStockOptionPlan2014Member
1637	Disclosure of outstanding stock options [Line Items]	LineItems			auo:DisclosureOfOutstandingStockOptionsLineItems
1638	Weighted-average exercise price (per share), Outstanding Beggining balance	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1639	Weighted average exercise price (per share), Options exercised	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
1640	Weighted average exercise price (per share), Options expired	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsExpiredInSharebasedPaymentArrangement
1641	Weighted-average exercise price (per share), Outstanding Beggining balance	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1642	Number of options, Outstanding Beggining balance	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1643	Number of options, Options exercised	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
1644	Number of options, Options expired	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsExpiredInSharebasedPaymentArrangement
1645	Number of options, Outstanding at Ending balance	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
1646	Number of options, Exercisable at Ending balance	Concept (Decimal)	As Of		ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
1647	1157 - Disclosure - Share-based Payments (Details Textual)	Network	*	*	http://auo.com/role/ShareBasedPaymentsDetailsTextual
1648	Disclosure of Share-based Payments [Table]	Table	*	*	auo:DisclosureOfSharebasedPaymentsTable
1649	Plan Names [Axis]	Axis			auo:PlanNamesAxis
1650	Plan Names [Domain]	Member			auo:PlanNamesDomain
1651	Option Plans [Axis]	Axis			auo:OptionPlansAxis
1652	Option Plans [Domain]	Member			auo:OptionPlansDomain
1653	ACTW Option Plan [Member]	Member			auo:ActwOptionPlanMember
1654	Disclosure of Share-based Payments [Line Items]	LineItems			auo:DisclosureOfSharebasedPaymentsLineItems
1655	Expense from share-based payment transactions with employees	Concept (Monetary)	For Period	Debit	ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
1656	1158 - Disclosure - Revenue from Contracts with Customers (Details)	Network	*	*	http://auo.com/role/RevenueFromContractsWithCustomersDetails
1657	Disclosure of disaggregation of revenue from contracts with customers [table]	Table	*	*	ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable
1658	Geographical areas [axis]	Axis			ifrs-full:GeographicalAreasAxis
1659	Geographical areas [member]	Member			ifrs-full:GeographicalAreasMember
1660	PRC [Member]	Member			auo:PrcMember
1661	Taiwan [Member]	Member			auo:TaiwanMember
1662	Singapore [Member]	Member			auo:SingaporeMember
1663	Japan [Member]	Member			auo:JapanMember
1664	Others [Member]	Member			auo:OtherMember
1665	Inter Product [Axis]	Axis			auo:InterProductAxis
1666	Inter Product [Domain]	Member			auo:InterProductDomain
1667	Dispaly segment [Member]	Member			auo:DisplayMember
1668	Energy segment [Member]	Member			auo:EnergyMember
1669	Pimary Geographical Market [Axis]	Axis			auo:PimaryGeographicalMarketAxis
1670	Pimary Geographical Market [Domain]	Member			auo:PimaryGeographicalMarketDomain
1671	Revenue From Primary Geographical Market [Member]	Member			auo:RevenueFromPrimaryGeographicalMarketMember
1672	Disclosure of disaggregation of revenue from contracts with customers [line items]	LineItems			ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems
1673	Revenue from contracts with customers	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromContractsWithCustomers
1674	1159 - Disclosure - Revenue from Contracts with Customers (Details 1)	Network	*	*	http://auo.com/role/RevenueFromContractsWithCustomersDetails1
1675	Disclosure of disaggregation of revenue from contracts with customers [table]	Table	*	*	ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable
1676	Products and services [axis]	Axis			ifrs-full:ProductsAndServicesAxis
1677	Products and services [member]	Member			ifrs-full:ProductsAndServicesMember
1678	Products for Televisions [Member]	Member			auo:ProductsForTelevisionsMember
1679	Products for Monitors [Member]	Member			auo:ProductsForMonitorsMember
1680	Products for Commercial and Others [Member]	Member			auo:ProductsForCommercialAndOthersMember
1681	Solar Products [Member]	Member			auo:SolarProductsMember
1682	Products For Mobile PCs And Devices [Member]	Member			auo:ProductsForMobilePCsAndDevicesMember
1683	Inter Product [Axis]	Axis			auo:InterProductAxis
1684	Inter Product [Domain]	Member			auo:InterProductDomain
1685	Dispaly segment [Member]	Member			auo:DisplayMember
1686	Energy segment [Member]	Member			auo:EnergyMember
1687	Major Products And Services [Axis]	Axis			auo:MajorProductsAndServicesAxis
1688	Major Products And Services [Domain]	Member			auo:MajorProductsAndServicesDomain
1689	Revenue From Major Products And Services [Member]	Member			auo:RevenueFromMajorProductsAndServicesMember
1690	Disclosure of disaggregation of revenue from contracts with customers [line items]	LineItems			ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems
1691	Revenue from contracts with customers	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromContractsWithCustomers
1692	1160 - Disclosure - Revenue from Contracts with Customers (Details 2)	Network	*	*	http://auo.com/role/RevenueFromContractsWithCustomersDetails2
1693	Disclosure of disaggregation of revenue from contracts with customers [table]	Table	*	*	ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable
1694	Types of customers [axis]	Axis			ifrs-full:TypesOfCustomersAxis
1695	Types of customers [member]	Member			ifrs-full:TypesOfCustomersMember
1696	Customer A [Member]	Member			auo:CustomerAMember
1697	Other Customers [Member]	Member			auo:OtherCustomersMember
1698	Inter Product [Axis]	Axis			auo:InterProductAxis
1699	Inter Product [Domain]	Member			auo:InterProductDomain
1700	Display [Member]	Member			auo:DisplayMember
1701	Energy [Member]	Member			auo:EnergyMember
1702	Customer [Axis]	Axis			ifrs-full:MajorCustomersAxis
1703	Customers [member]	Member			ifrs-full:MajorCustomersMember
1704	Revenue From Major Customers [Member]	Member			auo:RevenueFromMajorCustomersMember
1705	Disclosure of disaggregation of revenue from contracts with customers [line items]	LineItems			ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems
1706	Revenue from contracts with customers	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromContractsWithCustomers
1707	1161 - Disclosure - Revenue (Details)	Network	*	*	http://auo.com/role/RevenueDetails
1708	Statement [Table]	Table	*	*	us-gaap:StatementTable
1709	Class of Stock [axis]	Axis			us-gaap:StatementClassOfStockAxis
1710	Class of Stock [Domain]	Member			us-gaap:ClassOfStockDomain
1711	Statement [Line Items]	LineItems			us-gaap:StatementLineItems
1712	Sale of goods	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromSaleOfGoods
1713	Other operating revenue	Concept (Monetary)	For Period	Credit	ifrs-full:OtherRevenue
1714	Revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
1715	1162 - Disclosure - Remuneration to Employees and Directors (Details Textual)	Network	*	*	http://auo.com/role/RemunerationToEmployeesAndDirectorsDetailsTextual
1716	Implied Table	Table	*	*	implied:Table
1717	Disclosure of Remuneration to Employees and Directors [Abstract]	Abstract			auo:DisclosureOfRemunerationToEmployeesAndDirectorsAbstract
1718	Employees' minimum remuneration percentage	Concept (Percent)	For Period		auo:EmployeesMinimumRemunerationPercentage
1719	Directors' maximum remuneration percentage	Concept (Percent)	For Period		auo:DirectorsMaximumRemunerationPercentage
1720	Other short-term employee benefits	Concept (Monetary)	For Period	Debit	ifrs-full:OtherShorttermEmployeeBenefits
1721	Directors' remuneration expense	Concept (Monetary)	For Period	Debit	ifrs-full:DirectorsRemunerationExpense
1722	1163 - Disclosure - The Nature of Expenses (Details)	Network	*	*	http://auo.com/role/TheNatureOfExpensesDetails
1723	Disclosure Of Expenses By Nature Explanatory [Table]	Table	*	*	auo:DisclosureOfExpensesByNatureExplanatoryTable
1724	Income Statement [Axis]	Axis			auo:IncomeStatementAxis
1725	Income Statement [Domain]	Member			auo:IncomeStatementDomain
1726	Cost Of Sales [Member]	Member			auo:CostOfSaleMember
1727	Operating Expenses [Member]	Member			auo:OperatingExpensesMember
1728	Disclosure Of Expenses By Nature Explanatory [Line Items]	LineItems			auo:DisclosureOfExpensesByNatureExplanatoryLineItems
1729	Depreciation expense	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationExpense
1730	1164 - Disclosure - The Nature of Expenses (Details 1)	Network	*	*	http://auo.com/role/TheNatureOfExpensesDetails1
1731	Disclosure Of Expenses By Nature Explanatory [Table]	Table	*	*	auo:DisclosureOfExpensesByNatureExplanatoryTable
1732	Income Statement [axis]	Axis			auo:IncomeStatementAxis
1733	Income Statement [Domain]	Member			auo:IncomeStatementDomain
1734	Cost Of Sales [member]	Member			auo:CostOfSaleMember
1735	Operating Expenses [member]	Member			auo:OperatingExpensesMember
1736	Disclosure Of Expenses By Nature Explanatory [Line Items]	LineItems			auo:DisclosureOfExpensesByNatureExplanatoryLineItems
1737	Amortisation expense	Concept (Monetary)	For Period	Debit	ifrs-full:AmortisationExpense
1738	1165 - Disclosure - The Nature of Expenses (Details 2)	Network	*	*	http://auo.com/role/TheNatureOfExpensesDetails2
1739	Disclosure Of Expenses By Nature Explanatory [Table]	Table	*	*	auo:DisclosureOfExpensesByNatureExplanatoryTable
1740	Income Statement [Axis]	Axis			auo:IncomeStatementAxis
1741	Income Statement [Domain]	Member			auo:IncomeStatementDomain
1742	Cost Of Sale [Member]	Member			auo:CostOfSaleMember
1743	Operating Expenses [Member]	Member			auo:OperatingExpensesMember
1744	Disclosure Of Detailed Information Of Employees Benefits Expenses [Line Items]	LineItems			auo:DisclosureOfDetailedInformationOfEmployeesBenefitsExpensesLineItems
1745	Salaries and wages	Concept (Monetary)	For Period	Debit	ifrs-full:WagesAndSalaries
1746	Labor and health insurances	Concept (Monetary)	For Period	Debit	ifrs-full:SocialSecurityContributions
1747	Retirement benefits	Concept (Monetary)	For Period	Debit	auo:PostemploymentBenefitExpenseDefinedBenefitPlansAndDefinedContributionPlans
1748	Other employee benefits	Concept (Monetary)	For Period	Debit	ifrs-full:OtherEmployeeExpense
1749	Employee benefits expense	Concept (Monetary)	For Period	Debit	ifrs-full:EmployeeBenefitsExpense
1750	1166 - Disclosure - Other Income (Details)	Network	*	*	http://auo.com/role/OtherIncomeDetails
1751	Implied Table	Table	*	*	implied:Table
1752	Disclosure of other income explanatory [Abstract]	Abstract			auo:DisclosureOfOtherIncomeExplanatoryAbstract
1753	Interest income on bank deposits	Concept (Monetary)	For Period	Credit	ifrs-full:InterestIncomeOnDeposits
1754	Interest income on government bonds with reverse repurchase agreements and others	Concept (Monetary)	For Period	Credit	ifrs-full:InterestIncomeOnReverseRepurchaseAgreementsAndCashCollateralOnSecuritiesBorrowed
1755	Rental income, net	Concept (Monetary)	For Period	Credit	ifrs-full:RentalIncome
1756	Dividend income	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromDividends
1757	Grants	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromGovernmentGrants
1758	Others	Concept (Monetary)	For Period	Credit	ifrs-full:MiscellaneousOtherOperatingIncome
1759	Other income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherIncome
1760	1167 - Disclosure - Other Gains and Losses (Details)	Network	*	*	http://auo.com/role/OtherGainsAndLossesDetails
1761	Implied Table	Table	*	*	implied:Table
1762	Disclosure of other gains and losses [Abstract]	Abstract			auo:DisclosureOfOtherGainsAndLossesAbstract
1763	Foreign exchange gains (losses), net	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
1764	Gains (losses) on valuation of financial instruments at FVTPL, net	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss
1765	Gains (losses) on disposals of investments and financial assets, net	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnDisposalsOfInvestments
1766	Gains on disposals of property, plant and equipment, net	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnDisposalsOfPropertyPlantAndEquipment
1767	Impairment losses on assets	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLoss
1768	Litigation losses and others	Concept (Monetary)	For Period	Debit	ifrs-full:LossesOnLitigationSettlements
1769	Other gains (losses)	Concept (Monetary)	For Period	Credit	ifrs-full:OtherGainsLosses
1770	1168 - Disclosure - Finance Costs (Details)	Network	*	*	http://auo.com/role/FinanceCostsDetails
1771	Implied Table	Table	*	*	implied:Table
1772	Disclosure of finance cost explanatory [Abstract]	Abstract			auo:DisclosureOfFinanceCostExplanatoryAbstract
1773	Interest expense on bank borrowings	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpenseOnBorrowings
1774	Interest expense on others	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpenseOnOtherFinancialLiabilities
1775	Finance costs	Concept (Monetary)	For Period	Debit	ifrs-full:FinanceCosts
1776	1169 - Disclosure - Income Taxes (Details)	Network	*	*	http://auo.com/role/IncomeTaxesDetails
1777	Implied Table	Table	*	*	implied:Table
1778	Disclosure of income tax explanatory [Abstract]	Abstract			auo:DisclosureOfIncomeTaxExplanatoryAbstract
1779	Current income tax expense (benefit):	Abstract			ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriodsAbstract
1780	Current year	Concept (Monetary)	For Period	Debit	ifrs-full:CurrentTaxExpenseIncome
1781	Adjustment to prior years and others	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForCurrentTaxOfPriorPeriod
1782	Current income tax expense (benefit)	Concept (Monetary)	For Period	Debit	ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriods
1783	Deferred tax expense (benefit):	Abstract			ifrs-full:DeferredTaxExpenseIncomeAbstract
1784	Temporary differences	Concept (Monetary)	For Period	Debit	ifrs-full:DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences
1785	Investment tax credit and tax losses carryforwards	Concept (Monetary)	For Period	Credit	ifrs-full:TaxBenefitArisingFromPreviouslyUnrecognisedTaxLossTaxCreditOrTemporaryDifferenceOfPriorPeriodUsedToReduceDeferredTaxExpense
1786	Effect of changes in statutory income tax rate	Concept (Monetary)	For Period	Debit	ifrs-full:DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes
1787	Deferred tax expense (benefit)	Concept (Monetary)	For Period		ifrs-full:DeferredTaxExpenseIncomeRecognisedInProfitOrLoss
1788	Income tax expense (benefit)	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
1789	1170 - Disclosure - Income Taxes (Details 1)	Network	*	*	http://auo.com/role/IncomeTaxesDetails1
1790	Implied Table	Table	*	*	implied:Table
1791	Disclosure of income tax explanatory [Abstract]	Abstract			auo:DisclosureOfIncomeTaxExplanatoryAbstract
1792	Items that will never be reclassified to profit or loss:	Abstract			ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossAbstract
1793	Remeasurement of defined benefit obligations	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome
1794	Items that are or may be reclassified subsequently to profit or loss:	Abstract			ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossAbstract
1795	Foreign operations - foreign currency translation differences	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxRelatingToExchangeDifferencesOnTranslationOfOtherComprehensiveIncome
1796	1171 - Disclosure - Income Taxes (Details 2)	Network	*	*	http://auo.com/role/IncomeTaxesDetails2
1797	Implied Table	Table	*	*	implied:Table
1798	Reconciliation of accounting profit multiplied by applicable tax rates [abstract]	Abstract			ifrs-full:ReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesAbstract
1799	Income tax expense at AUO's statutory tax rate(Rate)	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
1800	Effect of different subsidiaries income tax rate(Rate)	Concept (Percent)	For Period		auo:TaxRateEffectOfDifferentSubsidiariesIncomeTaxRate
1801	Share of profit (loss) of equity-accounted subsidiaries(Rate)	Concept (Percent)	For Period		auo:TaxRateEffectOfShareOfProfitEquityAccountedSubsidiaries
1802	Effect of changes in statutory income tax rate(Rate)	Concept (Percent)	For Period		ifrs-full:TaxRateEffectFromChangeInTaxRate
1803	Effect of change of unrecognized deductible temporary differences, tax losses carryforwards, and investment tax credits(Rate)	Concept (Percent)	For Period		auo:TaxRateEffectOfChangeOfUnrecognizedDeductibleTemporaryDifferencesTaxLoss
1804	Net of non-taxable income and non-deductible expense(Rate)	Concept (Percent)	For Period		ifrs-full:TaxRateEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
1805	Loss (gain) from domestic long-term investment(Rate)	Concept (Percent)	For Period		auo:TaxRateEffectOfLossGainFromDomesticLongTermInvestment
1806	Tax on undistributed earnings, net(Rate)	Concept (Percent)	For Period		auo:TaxRateEffectOfUndistrbutedEarningsNet
1807	Adjustments to prior year (Rate)	Concept (Percent)	For Period		ifrs-full:TaxRateEffectOfAdjustmentsForCurrentTaxOfPriorPeriods
1808	Others(Rate)	Concept (Percent)	For Period		ifrs-full:OtherTaxRateEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
1809	Effective tax rate(Rate)	Concept (Percent)	For Period		ifrs-full:AverageEffectiveTaxRate
1810	Profit before income taxes	Concept (Monetary)	For Period	Credit	ifrs-full:AccountingProfit
1811	Income tax expense at AUO's statutory tax rate	Concept (Monetary)	For Period	Debit	ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
1812	Effect of different subsidiaries income tax rate	Concept (Monetary)	For Period	Debit	auo:TaxEffectOfDifferentSubsidiariesIncomeTaxRate
1813	Share of profit (loss) of equity-accounted subsidiaries	Concept (Monetary)	For Period	Credit	auo:TaxEffectOfShareOfProfitOfEquityAccountedSubsidiaries
1814	Effect of changes in statutory income tax rate	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectFromChangeInTaxRate
1815	Effect of change of unrecognized deductible temporary differences, tax losses carryforwards, and investment tax credits	Concept (Monetary)	For Period	Debit	auo:TaxEffectOfChangeOfUnrecognizedDeductibleTemporaryDifferencesTaxLoss
1816	Net of non-taxable income and non-deductible expense	Concept (Monetary)	For Period	Debit	ifrs-full:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
1817	Loss (gain) from domestic long-term investment	Concept (Monetary)	For Period	Debit	auo:TaxEffectOfLossGainFromDomesticLongTermInvestment
1818	Tax on undistributed earnings, net	Concept (Monetary)	For Period	Debit	auo:TaxEffectOfUndistributedEarningsNet
1819	Adjustments to prior year	Concept (Monetary)	For Period	Debit	auo:TaxEffectOfAdjustmentsToPriorYear
1820	Others	Concept (Monetary)	For Period	Debit	ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
1821	Income tax expense (benefit)	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
1822	1172 - Disclosure - Income Taxes (Details 3)	Network	*	*	http://auo.com/role/IncomeTaxesDetails3
1823	Disclosure of income tax explanatory [Table]	Table	*	*	auo:DisclosureOfIncomeTaxExplanatoryTable
1824	Temporary difference, unused tax losses and unused tax credits [axis]	Axis			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1825	Temporary difference, unused tax losses and unused tax credits [member]	Member			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1826	Deferred tax assets [Member]	Member			auo:DeferredTaxAssetsMember
1827	Deferred tax liabilities [Member]	Member			auo:DeferredTaxLiabilitiesMember
1828	Disclosure of income tax explanatory [Line Items]	LineItems			auo:DisclosureOfIncomeTaxExplanatoryLineItems
1829	Investment tax credits	Concept (Monetary)	As Of	Credit	auo:DeferredTaxLiabilityAssetRelatedToInvestmentsCredits
1830	Tax losses carryforwards	Concept (Monetary)	As Of	Credit	auo:DeferredTaxLiabilityAssetRelatedToTaxLossCarryforwards
1831	Unrealized loss and expenses	Concept (Monetary)	As Of	Credit	auo:DeferredTaxLiabilityAssetRelatedToUnrealizedLossAndExpenses
1832	Inventories write-down	Concept (Monetary)	As Of	Credit	auo:DeferredTaxLiabilityAssetRelatedToInventoriesWriteDown
1833	Foreign investment gains under the equity method	Concept (Monetary)	As Of	Credit	auo:DeferredTaxLiabilityAssetRelatedToForeignInvestmentsGainsUnderEquityMethod
1834	Remeasurement of defined benefit plans	Concept (Monetary)	As Of	Credit	auo:DeferredTaxLiabilityAssetRelatedToRemeasurementOfDefinedBenefitPlans
1835	Foreign operations - foreign currency translation differences	Concept (Monetary)	As Of	Credit	auo:DeferredTaxLiabilityAssetRelatedToForeignOperationsForeignCurrencyTranslationDifferences
1836	Others	Concept (Monetary)	As Of	Credit	auo:DeferredTaxLiabilityAssetRelatedToOthers
1837	Deferred tax assets (liabilities)	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
1838	1173 - Disclosure - Income Taxes (Details 4)	Network	*	*	http://auo.com/role/IncomeTaxesDetails4
1839	Disclosure of income tax explanatory [Table]	Table	*	*	auo:DisclosureOfIncomeTaxExplanatoryTable
1840	Temporary difference, unused tax losses and unused tax credits [axis]	Axis			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1841	Temporary difference, unused tax losses and unused tax credits [member]	Member			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1842	Investment tax credits [Member]	Member			auo:InvestmentTaxCreditsMember
1843	Tax losses carryforwards [Member]	Member			auo:TaxLossesCarryforwardsMember
1844	Unrealized loss and expenses [Member]	Member			auo:UnrealizedLossAndExpensesMember
1845	Inventories write-down [Member]	Member			auo:InventoriesWritedownMember
1846	Foreign investment losses (gains) under the equity method [Member]	Member			auo:ForeignInvestmentLossesGainsUnderEquityMethodMember
1847	Remeasurement of defined benefit plans [Member]	Member			auo:RemeasurementOfDefinedBenefitPlansMember
1848	Foreign operations-foreign currency translation differences [Member]	Member			auo:ForeignOperationsForeignCurrencyTranslationDifferencesMember
1849	Others [Member]	Member			auo:OthersMember
1850	Disclosure of income tax explanatory [Line Items]	LineItems			auo:DisclosureOfIncomeTaxExplanatoryLineItems
1851	Deferred tax assets and liabilities [abstract]	Abstract			ifrs-full:DeferredTaxAssetsAndLiabilitiesAbstract
1852	Balance Beginning	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
1853	Recognized in profit or loss	Concept (Monetary)	For Period		ifrs-full:DeferredTaxExpenseIncomeRecognisedInProfitOrLoss
1854	Recognized in other comprehensive income	Concept (Monetary)	For Period		ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
1855	Effect of change in consolidated entities, exchange rate and others	Concept (Monetary)	For Period	Debit	auo:DeferredTaxExpenseIncomeFromEffectOfExchangeRateAndOthers
1856	Balance Ending	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
1857	1174 - Disclosure - Income Taxes (Details 5)	Network	*	*	http://auo.com/role/IncomeTaxesDetails5
1858	Implied Table	Table	*	*	implied:Table
1859	Disclosure of income tax explanatory [Abstract]	Abstract			auo:DisclosureOfIncomeTaxExplanatoryAbstract
1860	Unused tax losses carryforwards	Concept (Monetary)	As Of		ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
1861	Unused investment tax credits	Concept (Monetary)	As Of	Debit	auo:UnusedInvestmentTaxCreditsForWhichNoDeferredTaxAssetRecognised
1862	Difference in depreciation expense for tax and financial purposes	Concept (Monetary)	As Of	Debit	auo:DifferenceInDepreciationExpenseForTaxAndFinancialPurposesForWhichNoDeferredTaxAssetRecognised
1863	Inventories write-down	Concept (Monetary)	As Of	Debit	auo:InventoriesWriteDownForWhichNoDeferredTaxAssetRecognised
1864	Others	Concept (Monetary)	As Of		ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
1865	Total unrecognized deferred tax assets	Concept (Monetary)	As Of	Debit	auo:TotalUnrecognizedDeferredTaxAssets
1866	1175 - Disclosure - Income Taxes (Details 6)	Network	*	*	http://auo.com/role/IncomeTaxesDetails6
1867	Disclosure of income tax explanatory [Table]	Table	*	*	auo:DisclosureOfIncomeTaxExplanatoryTable
1868	Unused tax losses assessment year [Axis]	Axis			auo:UnusedTaxLossesAssessmentYearAxis
1869	Unused tax losses assessment year [Domain]	Member			auo:UnusedTaxLossesAssessmentYearDomain
1870	2009 Unused tax losses carryforwards [Member]	Member			auo:UnusedTaxLossesCarryforwards2009Member
1871	2010 Unused tax losses carryforwards [Member]	Member			auo:UnusedTaxLossesCarryforwards2010Member
1872	2011 Unused tax losses carryforwards [Member]	Member			auo:UnusedTaxLossesCarryforwards2011Member
1873	2012 Unused tax losses carryforwards [Member]	Member			auo:UnusedTaxLossesCarryforwards2012Member
1874	2013 Unused tax losses carryforwards [Member]	Member			auo:UnusedTaxLossesCarryforwards2013Member
1875	2014 Unused tax losses carryforwards [Member]	Member			auo:UnusedTaxLossesCarryforwards2014Member
1876	2015 Unused tax losses carryforwards [Member]	Member			auo:UnusedTaxLossesCarryforwards2015Member
1877	2016 Unused tax losses carryforwards [Member]	Member			auo:UnusedTaxLossesCarryforwards2016Member
1878	2017 Unused tax losses carryforwards [Member]	Member			auo:UnusedTaxLossesCarryforwards2017Member
1879	2018 estimated Unused tax losses carryforwards [Member]	Member			auo:EstimatedUnusedTaxLossesCarryforwards2018Member
1880	Disclosure of income tax explanatory [Line Items]	LineItems			auo:DisclosureOfIncomeTaxExplanatoryLineItems
1881	Unrecognized deferred tax assets relating to unused tax losses carryforwards	Concept (Monetary)	As Of		ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
1882	Description of expiry date of deductible temporary differences, unused tax losses and unused tax credits	Concept (Text/String)	For Period		ifrs-full:DescriptionOfExpiryDateOfTemporaryDifferencesUnusedTaxLossesAndUnusedTaxCredits
1883	1176 - Disclosure - Income Taxes (Details Textual)	Network	*	*	http://auo.com/role/IncomeTaxesDetailsTextual
1884	Disclosure of income tax explanatory [Table]	Table	*	*	auo:DisclosureOfIncomeTaxExplanatoryTable
1885	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1886	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
1887	AFPD Pte., Ltd [Member]	Member			auo:AfpdPteLtdMember
1888	AUO Crystal Malaysia Sdn. Bhd [Member]	Member			auo:AuoCrystalMalaysiaSdnBhdMember
1889	Temporary difference, unused tax losses and unused tax credits [axis]	Axis			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1890	Temporary difference, unused tax losses and unused tax credits [member]	Member			ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1891	Deferred tax assets [member]	Member			ifrs-full:UnusedTaxLossesMember
1892	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
1893	Equity [Member]	Member			ifrs-full:EquityMember
1894	Undistributed Earnings [Member]	Member			auo:UndistributedEarningsMember
1895	Disclosure of income tax explanatory [Line Items]	LineItems			auo:DisclosureOfIncomeTaxExplanatoryLineItems
1896	Unused tax credits for which no deferred tax asset recognised	Concept (Monetary)	As Of		ifrs-full:UnusedTaxCreditsForWhichNoDeferredTaxAssetRecognised
1897	Temporary differences associated with investments in subsidiaries, branches and associates and interests in joint arrangements for which deferred tax liabilities have not been recognised	Concept (Monetary)	As Of		ifrs-full:TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesBranchesAndAssociatesAndInterestsInJointVentures
1898	Utilization Of Previously Unrecognized Tax Losses	Concept (Monetary)	For Period	Credit	auo:UtilizationOfPreviouslyUnrecognizedTaxLosses
1899	Tax benefit arising from previously unrecognised tax loss, tax credit or temporary difference of prior period used to reduce deferred tax expense	Concept (Monetary)	For Period	Credit	ifrs-full:TaxBenefitArisingFromPreviouslyUnrecognisedTaxLossTaxCreditOrTemporaryDifferenceOfPriorPeriodUsedToReduceDeferredTaxExpense
1900	Applicable tax rate	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
1901	1177 - Disclosure - Earnings per Share (Details)	Network	*	*	http://auo.com/role/EarningsPerShareDetails
1902	Implied Table	Table	*	*	implied:Table
1903	Disclosure of Earnings per Share [Abstract]	Abstract			auo:DisclosureOfEarningsPerShareAbstract
1904	Profit attributable to AUO's shareholders	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOwnersOfParent
1905	Weighted-average number of common shares outstanding during the year (basic)	Concept (Shares)	For Period		ifrs-full:WeightedAverageShares
1906	Basic earnings per share (In dollars per share)	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
1907	1178 - Disclosure - Earnings per Share (Details 1)	Network	*	*	http://auo.com/role/EarningsPerShareDetails1
1908	Implied Table	Table	*	*	implied:Table
1909	Disclosure of Earnings per Share [Abstract]	Abstract			auo:DisclosureOfEarningsPerShareAbstract
1910	Profit attributable to AUO's shareholders	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossAttributableToOwnersOfParent
1911	Weighted-average number of common shares outstanding during the year (including the effect of dilutive potential common stock):	Abstract			ifrs-full:WeightedAverageSharesAndAdjustedWeightedAverageSharesAbstract
1912	Weighted-average number of common shares (basic)	Concept (Shares)	For Period		ifrs-full:WeightedAverageShares
1913	Effect of employee remuneration in stock	Concept (Shares)	For Period		ifrs-full:DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares
1914	Weighted-average number of common shares (diluted)	Concept (Shares)	For Period		ifrs-full:AdjustedWeightedAverageShares
1915	Diluted earnings per share (In dollars per share)	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShare
1916	1179 - Disclosure - Financial Instruments (Details)	Network	*	*	http://auo.com/role/FinancialInstrumentsDetails
1917	Disclosure of financial instrument [Table]	Table	*	*	auo:DisclosureOfFinancialInstrumentTable
1918	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1919	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
1920	Available-for-sale financial assets - noncurrent [Member]	Member			ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
1921	Long-term receivables [Member]	Member			auo:LongTermReceivablesMember
1922	Refundable deposits [Member]	Member			auo:RefundableDepositsMember
1923	Financial assets mandatorily Measured at Fair Value Through Profit or Loss [Member]	Member			auo:FinancialAssetsMandatorilyAtFairValueThroughProfitOrLossMember
1924	Financial assets held for trading [Member]	Member			auo:FinancialAssetsHeldForTradingMember
1925	Financial assets at Fair Value Through Other Other Comprehensive Income [Member]	Member			auo:FinancialAssetsAtFairValueThroughOtherOtherComprehensiveIncomeMember
1926	Types of financial liabilities [axis]	Axis			ifrs-full:TypesOfFinancialLiabilitiesAxis
1927	Financial liabilities, type [member]	Member			ifrs-full:FinancialLiabilitiesTypeMember
1928	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
1929	Financial liabilities, class [member]	Member			ifrs-full:FinancialLiabilitiesMember
1930	Guarantee deposits [Member]	Member			auo:GuaranteeDepositsLiabilityMember
1931	Long-term borrowings (including current installments) [Member]	Member			auo:LongTermsBorrowingsMember
1932	Financial liabilities held for trading [Member]	Member			auo:FinancialLiabilitiesHeldForTradingMember
1933	Categories of financial assets [axis]	Axis			ifrs-full:CategoriesOfFinancialAssetsAxis
1934	Financial assets, category [member]	Member			ifrs-full:FinancialAssetsCategoryMember
1935	Categories of financial liabilities [axis]	Axis			ifrs-full:CategoriesOfFinancialLiabilitiesAxis
1936	Financial liabilities, category [member]	Member			ifrs-full:FinancialLiabilitiesCategoryMember
1937	Disclosure of detailed information about financial instruments [line items]	LineItems			ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1938	Financial assets, Carrying Amount	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
1939	Financial assets, Fair Value	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValue
1940	Financial lliabilities, Carrying Amount	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilities
1941	Financial liabilities, Fair Value	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilitiesAtFairValue
1942	1180 - Disclosure - Financial Instruments (Details 1)	Network	*	*	http://auo.com/role/FinancialInstrumentsDetails1
1943	Disclosure of financial instrument [Table]	Table	*	*	auo:DisclosureOfFinancialInstrumentTable
1944	Classes of financial assets [axis]	Axis			ifrs-full:ClassesOfFinancialAssetsAxis
1945	Financial assets, class [member]	Member			ifrs-full:FinancialAssetsMember
1946	Long-term receivables [Member]	Member			auo:LongTermReceivablesMember
1947	Financial assets mandatorily Measured at Fair Value Through Profit or Loss [Member]	Member			auo:FinancialAssetsMandatorilyAtFairValueThroughProfitOrLossMember
1948	Financial assets at Fair Value Through Other Comprehensive Income [Member]	Member			auo:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeMember
1949	Financial assets held for trading [Member]	Member			auo:FinancialAssetsHeldForTradingMember
1950	Available-for-sale financial assets [member]	Member			ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
1951	Financial liabilities held for trading [Member]	Member			auo:FinancialLiabilitiesHeldForTradingMember
1952	Levels of fair value hierarchy [axis]	Axis			ifrs-full:LevelsOfFairValueHierarchyAxis
1953	All levels of fair value hierarchy [member]	Member			ifrs-full:AllLevelsOfFairValueHierarchyMember
1954	Level 1 [member]	Member			ifrs-full:Level1OfFairValueHierarchyMember
1955	Level 2 [member]	Member			ifrs-full:Level2OfFairValueHierarchyMember
1956	Level 3 [member]	Member			ifrs-full:Level3OfFairValueHierarchyMember
1957	Categories of financial assets [axis]	Axis			ifrs-full:CategoriesOfFinancialAssetsAxis
1958	Financial assets, category [member]	Member			ifrs-full:FinancialAssetsCategoryMember
1959	Financial assets at fair value through profit or loss [member]	Member			ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
1960	Loans and receivables [member]	Member			ifrs-full:LoansAndReceivablesCategoryMember
1961	Financial assets at amortised cost [member]	Member			ifrs-full:FinancialAssetsAtAmortisedCostMember
1962	Categories of financial liabilities [axis]	Axis			ifrs-full:CategoriesOfFinancialLiabilitiesAxis
1963	Financial liabilities, category [member]	Member			ifrs-full:FinancialLiabilitiesCategoryMember
1964	Financial liabilities at fair value through profit or loss [Member]	Member			ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember
1965	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
1966	Financial liabilities, class [member]	Member			ifrs-full:FinancialLiabilitiesMember
1967	Disclosure of financial instrument [Line Items]	LineItems			auo:DisclosureOfFinancialInstrumentLineItems
1968	Disclosure of fair value measurement of assets [abstract]	Abstract			ifrs-full:DisclosureOfFairValueMeasurementOfAssetsAbstract
1969	Financial assets, at fair value	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValue
1970	Disclosure of fair value measurement of liabilities [abstract]	Abstract			ifrs-full:DisclosureOfFairValueMeasurementOfLiabilitiesAbstract
1971	Financial liabilities, at fair value	Concept (Monetary)	As Of	Credit	ifrs-full:FinancialLiabilitiesAtFairValue
1972	1181 - Disclosure - Financial Instruments (Details 2)	Network	*	*	http://auo.com/role/FinancialInstrumentsDetails2
1973	Disclosure of financial instrument [Table]	Table	*	*	auo:DisclosureOfFinancialInstrumentTable
1974	Categories of financial assets [axis]	Axis			ifrs-full:CategoriesOfFinancialAssetsAxis
1975	Financial assets, category [member]	Member			ifrs-full:FinancialAssetsCategoryMember
1976	Financial assets available-for-sale without quoted market prices [member]	Member			ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
1977	Disclosure of financial instrument [Line Items]	LineItems			auo:DisclosureOfFinancialInstrumentLineItems
1978	Total assets at the beginning of the year	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
1979	Net gains (losses) included in profit or loss	Concept (Monetary)	For Period		ifrs-full:GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets
1980	Net gains (losses) included in other comprehensive income	Concept (Monetary)	For Period		ifrs-full:GainsLossesRecognisedInOtherComprehensiveIncomeFairValueMeasurementAssets
1981	Purchases	Concept (Monetary)	For Period	Debit	ifrs-full:PurchasesFairValueMeasurementAssets
1982	Transfer in	Concept (Monetary)	For Period	Debit	ifrs-full:TransfersIntoLevel3OfFairValueHierarchyAssets
1983	Effect of change in exchange rate	Concept (Monetary)	For Period	Debit	auo:EffectOfChangeInExchangeRateFairValueMeasurementAssets
1984	Total assets at the end of the year	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
1985	1182 - Disclosure - Financial Instruments (Details 3)	Network	*	*	http://auo.com/role/FinancialInstrumentsDetails3
1986	Disclosure of financial instrument [Table]	Table	*	*	auo:DisclosureOfFinancialInstrumentTable
1987	Categories of financial assets [axis]	Axis			ifrs-full:CategoriesOfFinancialAssetsAxis
1988	Financial assets, category [member]	Member			ifrs-full:FinancialAssetsCategoryMember
1989	Financial assets at FVTOCI - equity instruments without quoted market prices [member]	Member			ifrs-full:InvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember
1990	Disclosure of financial instrument [Line Items]	LineItems			auo:DisclosureOfFinancialInstrumentLineItems
1991	Total assets at the beginning of the year	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
1992	Adjustments on initial application of IFRS 9	Concept (Monetary)	For Period	Credit	auo:InitialApplicationOfNewStandardFairValueMeasurementsAssets
1993	Net gains included in other comprehensive income	Concept (Monetary)	For Period		ifrs-full:GainsLossesRecognisedInOtherComprehensiveIncomeFairValueMeasurementAssets
1994	Purchases	Concept (Monetary)	For Period	Debit	ifrs-full:PurchasesFairValueMeasurementAssets
1995	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:SalesFairValueMeasurementAssets
1996	Total assets at the end of the year	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
1997	1183 - Disclosure - Financial Instruments (Details 4)	Network	*	*	http://auo.com/role/FinancialInstrumentsDetails4
1998	Disclosure of financial instrument [Table]	Table	*	*	auo:DisclosureOfFinancialInstrumentTable
1999	Categories of financial assets [axis]	Axis			ifrs-full:CategoriesOfFinancialAssetsAxis
2000	Financial assets, category [member]	Member			ifrs-full:FinancialAssetsCategoryMember
2001	Financial assets at FVTOCI - equity instruments without quoted market prices [member]	Member			ifrs-full:InvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember
2002	Range [Axis]	Axis			ifrs-full:RangeAxis
2003	Ranges [member]	Member			ifrs-full:RangesMember
2004	Bottom of range [member]	Member			ifrs-full:BottomOfRangeMember
2005	Top of range [member]	Member			ifrs-full:TopOfRangeMember
2006	Price Ratio [Axis]	Axis			auo:PriceRatioAxis
2007	Price Ratio [Domain]	Member			auo:PriceRatioDomain
2008	Price Book Ratio [Member]	Member			auo:PriceBookRatioMember
2009	Price Earnings Ratio [Member]	Member			auo:PriceEarningsRatioMember
2010	Lack Of Marketability [Member]	Member			auo:LackOfMarketabilityMember
2011	Disclosure of financial instrument [Line Items]	LineItems			auo:DisclosureOfFinancialInstrumentLineItems
2012	Valuation technique	Concept (Text/String)	For Period		ifrs-full:DescriptionOfValuationTechniquesUsedInFairValueMeasurementAssets
2013	Price-Book ratio, significant unobservable inputs, assets	Concept (Decimal)	For Period		auo:PriceBookRatioSignificantUnobservableInputsAssets
2014	Price-Earnings ratio, significant unobservable inputs, assets	Concept (Decimal)	For Period		auo:PriceEarningsRatioSignificantUnobservableInputsAssets
2015	Discount for lack of marketability, significant unobservable inputs, assets	Concept (Percent)	For Period		auo:DiscountForLackOfMarketabilitySignificantUnobservableInputsAssets
2016	Inter-relationship between significant unobservable inputs and fair value measurement	Concept (Text/String)	For Period		ifrs-full:DescriptionOfInterrelationshipsBetweenUnobservableInputsAndOfHowTheyMightMagnifyOrMitigateEffectOfChangesInUnobservableInputsOnFairValueMeasurementAssets
2017	1184 - Disclosure - Financial Instruments (Details Textual)	Network	*	*	http://auo.com/role/FinancialInstrumentsDetailsTextual
2018	Disclosure of financial instrument [Table]	Table	*	*	auo:DisclosureOfFinancialInstrumentTable
2019	Categories of financial assets [axis]	Axis			ifrs-full:CategoriesOfFinancialAssetsAxis
2020	Financial assets, category [member]	Member			ifrs-full:FinancialAssetsCategoryMember
2021	Disclosure of fair value measurement of assets [line items]	LineItems			ifrs-full:DisclosureOfFairValueMeasurementOfAssetsLineItems
2022	Gains (losses) recognised in profit or loss attributable to change in unrealised gains or losses for assets held at end of period, fair value measurement	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesRecognisedInProfitOrLossAttributableToChangeInUnrealisedGainsOrLossesForAssetsHeldAtEndOfPeriodFairValueMeasurement
2023	1185 - Disclosure - Financial Risk Management (Details)	Network	*	*	http://auo.com/role/FinancialRiskManagementDetails
2024	Disclosure Of Financial Risk Management Explanatory [Table]	Table	*	*	auo:DisclosureOfFinancialRiskManagementExplanatoryTable
2025	Classes of financial instruments [axis]	Axis			ifrs-full:ClassesOfFinancialInstrumentsAxis
2026	Financial instruments, class [member]	Member			ifrs-full:ClassesOfFinancialInstrumentsMember
2027	Short-term borrowings [Member]	Member			auo:ShortTermBorrowingsMember
2028	Long-term borrowings (including current installments) [Member]	Member			auo:LongTermBorrowingMember
2029	Refundable deposits [Member]	Member			auo:RefundableDepositsMember
2030	Foreign currency forward contracts-inflows [Member]	Member			auo:ForeignCurrencyForwardContractsInflowsMember
2031	Foreign currency forward contracts-outflows [Member]	Member			auo:ForeignCurrencyForwardContractsOutflowsMember
2032	Maturity [axis]	Axis			ifrs-full:MaturityAxis
2033	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
2034	Not later than one year [member]	Member			ifrs-full:NotLaterThanOneYearMember
2035	Later than five years [member]	Member			ifrs-full:LaterThanFiveYearsMember
2036	Later than one year and not later than three years [member]	Member			ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember
2037	Later than three years and not later than five years [member]	Member			ifrs-full:LaterThanThreeYearsAndNotLaterThanFiveYearsMember
2038	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
2039	Risks [member]	Member			ifrs-full:TypesOfRisksMember
2040	Liquidity risk [member]	Member			ifrs-full:LiquidityRiskMember
2041	Disclosure of Financial Risk Management Explanatory [Line Items]	LineItems			auo:DisclosureOfFinancialsRiskManagementExplanatoryLineItems
2042	Non-derivative financial liabilities	Abstract			ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesAbstract
2043	Non-derivative financial liabilities, Contractual cash flows	Concept (Monetary)	As Of	Credit	ifrs-full:NonderivativeFinancialLiabilitiesUndiscountedCashFlows
2044	Derivative financial instruments	Abstract			ifrs-full:DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesAbstract
2045	Derivative financial instruments, Contractual cash flows	Concept (Monetary)	As Of	Credit	ifrs-full:DerivativeFinancialLiabilitiesUndiscountedCashFlows
2046	Total non-derivative and derivative financial instruments	Abstract			auo:DisclosureOfMaturityAnalysisForNonderivativeAndDerivativeFinancialInstrumentsAbstract
2047	Financial liabilities and financial instruments, Contractual cash flows	Concept (Monetary)	As Of	Credit	auo:FinancialLiabilitiesUndiscountedCashFlows
2048	1186 - Disclosure - Financial Risk Management (Details 1)	Network	*	*	http://auo.com/role/FinancialRiskManagementDetails1
2049	Disclosure Of Financial Risk Management Explanatory [Table]	Table	*	*	auo:DisclosureOfFinancialRiskManagementExplanatoryTable
2050	Hedging instruments [axis]	Axis			ifrs-full:HedgingInstrumentsAxis
2051	Hedging instruments [member]	Member			ifrs-full:HedgingInstrumentsMember
2052	Monetary items [Member]	Member			auo:HedgingMonetaryItemsMember
2053	Nonmonetary items [Member]	Member			auo:HedgingNonmonetaryItemsMember
2054	Types Of Currency [Axis]	Axis			auo:TypesOfCurrencyAxis
2055	Types Of Currency [Domain]	Member			auo:TypesOfCurrencyDomain
2056	USD currency [Member]	Member			auo:UsdCurrencyMember
2057	JPY currency [Member]	Member			auo:JpyCurrencyMember
2058	EUR currency [Member]	Member			auo:EurCurrencyMember
2059	RMB currency [Member]	Member			auo:RmbCurrencyMember
2060	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
2061	Risks [member]	Member			ifrs-full:TypesOfRisksMember
2062	Currency risk [member]	Member			ifrs-full:CurrencyRiskMember
2063	Disclosure of Financial Risk Management Explanatory [Line Items]	LineItems			auo:DisclosureOfFinancialsRiskManagementExplanatoryLineItems
2064	Financial assets and financial liabilities	Abstract			auo:FinancialAssetsAndFinancialLiabilitiesAbstract
2065	Financial assets, Foreign currency amounts	Concept (Monetary)	As Of	Debit	auo:FinancialAssetsAmountDenominatedInForeignCurrency
2066	Exchange rate	Concept (Decimal)	As Of		ifrs-full:ClosingForeignExchangeRate
2067	Financial Assets, Carrying Amount	Concept (Monetary)	As Of	Debit	auo:FinancialAssetsCarryingAmount
2068	Financial Liabilities, Foreign currency amounts	Concept (Monetary)	As Of	Debit	auo:FinancialLiabilitiesAmountDenominatedInForeignCurrency
2069	Financial Liabilities, Carrying Amount	Concept (Monetary)	As Of	Debit	auo:FinancialLiabilitiesCarryingAmount
2070	1187 - Disclosure - Financial Risk Management (Details 2)	Network	*	*	http://auo.com/role/FinancialRiskManagementDetails2
2071	Statement [Table]	Table	*	*	us-gaap:StatementTable
2072	Sensitivity Analysis [Axis]	Axis			auo:SensitivityAnalysisAxis
2073	Sensitivity Analysis [Domain]	Member			auo:SensitivityAnalysisDomain
2074	Sensitivity analysis of foreign currency risk [Member]	Member			auo:SensitivityAnalysisOfForeignCurrencyRiskMember
2075	Types of risks [axis]	Axis			ifrs-full:TypesOfRisksAxis
2076	Risks [member]	Member			ifrs-full:TypesOfRisksMember
2077	Currency risk [member]	Member			ifrs-full:CurrencyRiskMember
2078	Types of Currency risks [Axis]	Axis			auo:TypesOfCurrencyRisksAxis
2079	Types of Currency risks [Domain]	Member			auo:TypesOfCurrencyRisksDomain
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2086	Disclosure Of Financial Risk Management Explanatory [Table]	Table	*	*	auo:DisclosureOfFinancialRiskManagementExplanatoryTable
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2121	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
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2124	Associates [member]	Member			ifrs-full:AssociatesMember
2125	Joint ventures [member]	Member			ifrs-full:JointVenturesWhereEntityIsVenturerMember
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2131	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
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2140	1193 - Disclosure - Related-party Transactions (Details 3)	Network	*	*	http://auo.com/role/RelatedPartyTransactionsDetails3
2141	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
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2146	Disclosure of transactions between related parties [line items]	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
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2148	1194 - Disclosure - Related-party Transactions (Details 4)	Network	*	*	http://auo.com/role/RelatedPartyTransactionsDetails4
2149	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
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2151	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
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2156	Property, Plant and Equipment [Member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
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2160	1195 - Disclosure - Related-party Transactions (Details 5)	Network	*	*	http://auo.com/role/RelatedPartyTransactionsDetails5
2161	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2162	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
2163	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2164	Associates [member]	Member			ifrs-full:AssociatesMember
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2166	Disclosure of transactions between related parties [line items]	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
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2168	1196 - Disclosure - Related-party Transactions (Details 6)	Network	*	*	http://auo.com/role/RelatedPartyTransactionsDetails6
2169	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
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2171	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
2172	Associates [member]	Member			ifrs-full:AssociatesMember
2173	Joint ventures [member]	Member			ifrs-full:JointVenturesWhereEntityIsVenturerMember
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2175	Disclosure of transactions between related parties [line items]	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
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2177	1197 - Disclosure - Related-party Transactions (Details 7)	Network	*	*	http://auo.com/role/RelatedPartyTransactionsDetails7
2178	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
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2181	Associates [member]	Member			ifrs-full:AssociatesMember
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2186	1198 - Disclosure - Related-party Transactions (Details 8)	Network	*	*	http://auo.com/role/RelatedPartyTransactionsDetails8
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2196	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
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2202	Disclosure of transactions between related parties [line items]	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
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2204	1200 - Disclosure - Related-party Transactions (Details Textual)	Network	*	*	http://auo.com/role/RelatedPartyTransactionsDetailsTextual
2205	Statement [Table]	Table	*	*	us-gaap:StatementTable
2206	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
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