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Benefit Plans - Additional Information (Detail) (USD $)
Share data in Millions, except Per Share data, unless otherwise specified
12 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum portion of pre-tax earnings under Savings Plan that can be deferred by participating U.S. employees $ 17,500us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount    
Employer contribution to Savings Plan 163,000,000us-gaap_DefinedContributionPlanCostRecognized 135,000,000us-gaap_DefinedContributionPlanCostRecognized 114,000,000us-gaap_DefinedContributionPlanCostRecognized
Fair value of vested RSUs as of vesting date 3,400,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue 3,100,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue 3,300,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
The total shares withheld upon vesting of RSUs 15.6us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation 15.5us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation 16.1us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation
Taxes paid related to net share settlement of equity awards 1,200,000,000us-gaap_EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards 1,100,000,000us-gaap_EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards 1,200,000,000us-gaap_EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards
Stock options outstanding 6.6us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber    
Stock options, Weighted average exercise price per share $ 21.99us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice    
Stock options, Weighted average remaining contractual term 1 year 4 months 24 days    
Stock options, Aggregate intrinsic value 520,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue    
Total intrinsic value of options at the time of exercise 1,500,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue 1,000,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue 2,300,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Income tax benefit related to share-based compensation expense 1,000,000,000us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost 816,000,000us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost 567,000,000us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
Total unrecognized compensation cost on stock options and RSUs 6,300,000,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized    
Total unrecognized compensation cost on stock options and RSUs, weighted-average recognition period (in years) 2 years 10 months 24 days    
Employee Stock Purchase Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares reserved for future issuance under Employee Benefit Plans (in shares) 7.6us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= aapl_EmployeeStockPurchasePlanMember
   
Employee common stock purchases through payroll deductions, price as a percentage of fair market value 85.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
/ us-gaap_AwardTypeAxis
= aapl_EmployeeStockPurchasePlanMember
   
Employee stock purchase plan offering period 6 months    
Payroll deductions as a percentage of employee compensation, maximum 10.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate
/ us-gaap_AwardTypeAxis
= aapl_EmployeeStockPurchasePlanMember
   
Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Rate of contribution to Savings Plan as a percentage of employees contribution 50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Rate of contribution to Savings Plan as a percentage of employees contribution 100.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Rate of contribution to Savings Plan as a percentage of employees earning 6.00%aapl_DefinedContributionPlanContributionRatesAsPercentageOfEmployeesEarnings
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Maximum | Employee Stock Purchase Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employee stock purchase program authorized amount $ 25,000aapl_EmployeeStockPurchaseProgramAuthorizedAmount
/ us-gaap_AwardTypeAxis
= aapl_EmployeeStockPurchasePlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Employee Stock Plan, 2014 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized for future issuance under stock plans (in shares) 385us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= aapl_EmployeeStockPurchasePlanTwentyFourteenMember
   
Shares reserved for future issuance under Employee Benefit Plans (in shares) 492.6us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= aapl_EmployeeStockPurchasePlanTwentyFourteenMember
   
Employee Stock Plan, 2003 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options granted exercisable period 4 years    
Employee Stock Plan, 2003 Plan | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expiration term of options granted under Employee Benefit Plans 7 years    
RSUs granted vesting period 2 years    
Employee Stock Plan, 2003 Plan | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expiration term of options granted under Employee Benefit Plans 10 years    
RSUs granted vesting period 4 years    
Directors Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares reserved for future issuance under Employee Benefit Plans (in shares) 1.2us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= aapl_DirectorsPlanMember
   
Share based compensation, expiration date Nov. 09, 2019