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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 | 6 Months Ended
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Nov. 30, 2014 | Nov. 30, 2013 | Nov. 30, 2014 | Nov. 30, 2013
Employee Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Employee stock purchase plans, payroll deductions (percent) | 10.00%nke_ShareBasedCompensationArrangementByEmployeeStockPurchasePlanStockPurchasesAsPercentageOfEmployeeCompensationMaximum / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  | 10.00%nke_ShareBasedCompensationArrangementByEmployeeStockPurchasePlanStockPurchasesAsPercentageOfEmployeeCompensationMaximum / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockMember / us-gaap_StatementClassOfStockAxis = 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 / us-gaap_AwardTypeAxis = 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) | 326,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = nke_StockIncentivePlan1990Member / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  | 326,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = nke_StockIncentivePlan1990Member / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |
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 | $ 251 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_PlanNameAxis = nke_StockIncentivePlan1990Member / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  | $ 251 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_PlanNameAxis = nke_StockIncentivePlan1990Member / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |
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 4 months 24 days |
Weighted average fair value per share of the options granted (in dollars per share) |  |  | $ 16.94 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = nke_StockIncentivePlan1990Member / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 14.88 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = nke_StockIncentivePlan1990Member / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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 | $ 5 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockMember / us-gaap_PlanNameAxis = nke_StockIncentivePlan1990Member / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 4 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockMember / us-gaap_PlanNameAxis = nke_StockIncentivePlan1990Member / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 9 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockMember / us-gaap_PlanNameAxis = nke_StockIncentivePlan1990Member / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 8 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockMember / us-gaap_PlanNameAxis = nke_StockIncentivePlan1990Member / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember

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- Definition The percentage of the fair market value that shares are purchased by participants participating in the Employee Stock Purchase Plan. The percentage is applied to the lower of the fair market value at the beginnning or the end of the offering period. + References No definition available. + Details
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- Definition Employee Stock Purchase Plan Offering Period + References No definition available. + Details
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- Definition Minimum Term of Market Traded Options For Estimates of Expected Volatility + References No definition available. + Details
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- Definition The maximum payroll deduction for employees for the purchase of stock under the Employee Stock Purchase Plan. + References No definition available. + Details
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- Definition The number of years from the date of grant that stock option awards expire. + References No definition available. + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition. + References No definition available. + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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