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Stock Based Compensation - Additional Information (Detail) (Class B Common Stock, USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Feb. 28, 2015
Feb. 28, 2014
Feb. 28, 2015
Feb. 28, 2014
Employee Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Employee stock purchase plans, payroll deductions (percent) 10.00%nke_ShareBasedCompensationArrangementByEmployeeStockPurchasePlanStockPurchasesAsPercentageOfEmployeeCompensationMaximum
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= us-gaap_EmployeeStockMember
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= us-gaap_CommonClassBMember
  10.00%nke_ShareBasedCompensationArrangementByEmployeeStockPurchasePlanStockPurchasesAsPercentageOfEmployeeCompensationMaximum
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= us-gaap_EmployeeStockMember
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= us-gaap_CommonClassBMember
 
Employee stock purchase plan offering period (in months)     6 months  
Shares purchased, price as percentage of lower of the fair market value (percent) 85.00%nke_EmployeeCommonStockPurchasesThroughPayrollDeductionsPriceAsPercentageOfFairMarketValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
  85.00%nke_EmployeeCommonStockPurchasesThroughPayrollDeductionsPriceAsPercentageOfFairMarketValue
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= us-gaap_EmployeeStockMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
 
Stock Incentive Plan 1990        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for grant (in shares) 326,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
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  326,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
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Stock options vesting period (in years)     4 years  
Stock options expiration from the date of grant (in years)     10 years  
Unrecognized compensation costs from stock options, net of estimated forfeitures $ 216us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_PlanNameAxis
= nke_StockIncentivePlan1990Member
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  $ 216us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
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Unrecognized compensation costs from stock options, net of estimated forfeitures, to be recognized as operating overhead expense over a weighted average period (in years)     2 years 2 months 12 days  
Weighted average fair value per share of the options granted (in dollars per share)     $ 16.94us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
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= nke_StockIncentivePlan1990Member
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$ 14.88us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
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Minimum term of market traded options for estimates of expected volatility (in years)     1 year  
Stock Incentive Plan 1990 | Employee Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Accelerated stock option expense $ 5us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember
/ us-gaap_PlanNameAxis
= nke_StockIncentivePlan1990Member
/ us-gaap_StatementClassOfStockAxis
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$ 3us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost
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= us-gaap_EmployeeStockMember
/ us-gaap_PlanNameAxis
= nke_StockIncentivePlan1990Member
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
$ 14us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember
/ us-gaap_PlanNameAxis
= nke_StockIncentivePlan1990Member
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$ 11us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost
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= us-gaap_EmployeeStockMember
/ us-gaap_PlanNameAxis
= nke_StockIncentivePlan1990Member
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