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Financial Instruments - Additional Information (Detail) (USD $)
12 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 29, 2012
Financial Instruments [Line Items]      
Maturities of long-term marketable securities, minimum 1 year    
Maturities of long-term marketable securities, maximum 5 years    
Hedged foreign currency transactions, expected occurrence 12 months    
Hedged interest rate transactions, expected occurrence 4 years    
Cash collateral posted, derivative instruments   $ 164,000,000us-gaap_CollateralAlreadyPostedAggregateFairValue  
Net cash collateral received, derivative instruments 2,100,000,000aapl_CollateralAlreadyReceivedAggregateFairValue    
Reduction to derivative assets by rights of set-off associated with derivative contracts 1,600,000,000aapl_DerivativeAssetsReducedForMasterNettingArrangements 333,000,000aapl_DerivativeAssetsReducedForMasterNettingArrangements  
Reduction to derivative liabilities by rights of set-off associated with derivative contracts 1,600,000,000aapl_DerivativeLiabilitiesReducedForMasterNettingArrangements 333,000,000aapl_DerivativeLiabilitiesReducedForMasterNettingArrangements  
Net derivative assets (liabilities) (549,000,000)us-gaap_DerivativeFairValueOfDerivativeNet (57,000,000)us-gaap_DerivativeFairValueOfDerivativeNet  
Number of customers representing 10% or more of trade receivables 2aapl_NumberOfCustomersWithSignificantAccountsReceivableBalance 2aapl_NumberOfCustomersWithSignificantAccountsReceivableBalance  
Number of vendors representing a significant portion of non-trade receivables 3aapl_NumberOfSignificantVendors 3aapl_NumberOfSignificantVendors  
Cash flow hedges | Other income/expense, net      
Financial Instruments [Line Items]      
Loss recognized for ineffective portions of and amounts excluded from effectiveness testing $ 120,000,000us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_NonoperatingIncomeExpenseMember
$ 301,000,000us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_NonoperatingIncomeExpenseMember
$ 658,000,000us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_NonoperatingIncomeExpenseMember
Trade Receivables | Customer One      
Financial Instruments [Line Items]      
Concentration risk, percentage 16.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_TradeAccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= aapl_CustomerOneConcentrationRiskMember
13.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_TradeAccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= aapl_CustomerOneConcentrationRiskMember
 
Trade Receivables | Customer Two      
Financial Instruments [Line Items]      
Concentration risk, percentage 13.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_TradeAccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= aapl_CustomerTwoConcentrationRiskMember
10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_TradeAccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= aapl_CustomerTwoConcentrationRiskMember
 
Trade Receivables | Total Cellular Network Carriers      
Financial Instruments [Line Items]      
Concentration risk, percentage 72.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_TradeAccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= aapl_TotalCellularNetworkCarriersMember
68.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_TradeAccountsReceivableMember
/ us-gaap_MajorCustomersAxis
= aapl_TotalCellularNetworkCarriersMember
 
Non-Trade Receivables | Vendor One      
Financial Instruments [Line Items]      
Concentration risk, percentage 51.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= aapl_NonTradeReceivableMember
/ us-gaap_MajorCustomersAxis
= aapl_VendorOneMember
47.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= aapl_NonTradeReceivableMember
/ us-gaap_MajorCustomersAxis
= aapl_VendorOneMember
 
Non-Trade Receivables | Vendor Two      
Financial Instruments [Line Items]      
Concentration risk, percentage 16.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= aapl_NonTradeReceivableMember
/ us-gaap_MajorCustomersAxis
= aapl_VendorTwoMember
21.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= aapl_NonTradeReceivableMember
/ us-gaap_MajorCustomersAxis
= aapl_VendorTwoMember
 
Non-Trade Receivables | Vendor Three      
Financial Instruments [Line Items]      
Concentration risk, percentage 14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= aapl_NonTradeReceivableMember
/ us-gaap_MajorCustomersAxis
= aapl_VendorThreeMember
15.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= aapl_NonTradeReceivableMember
/ us-gaap_MajorCustomersAxis
= aapl_VendorThreeMember