Summary of Significant Accounting Policies (Policies)	9 Months Ended
Feb. 29, 2020
Accounting Policies [Abstract]
Basis of Presentation	BASIS OF PRESENTATION The Unaudited Condensed Consolidated Financial Statements include the accounts of NIKE, Inc. and its subsidiaries (the “Company” or “NIKE”) and reflect all normal recurring adjustments which are, in the opinion of management, necessary for a fair statement of the results of operations for the interim period. The year-end Condensed Consolidated Balance Sheet data as of May 31, 2019 was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America (“U.S. GAAP”). The interim financial information and notes thereto should be read in conjunction with the Company's latest Annual Report on Form 10-K. The results of operations for the three and nine months ended February 29, 2020 are not necessarily indicative of results to be expected for the entire fiscal year.
Recently Adopted Accounting Standards	RECENTLY ADOPTED ACCOUNTING STANDARDS In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-02, Leases (Topic 842), which replaced existing lease accounting guidance. The new standard is intended to provide enhanced transparency and comparability by requiring lessees to record right-of-use (ROU) assets and corresponding lease liabilities on the balance sheet. ROU assets represent the Company's right to use an underlying asset for the lease term and lease liabilities represent the Company's obligation to make lease payments arising from the lease. The new guidance requires the Company to continue to classify leases as either an operating or finance lease, with classification affecting the pattern of expense recognition in the income statement. In addition, the new standard requires enhanced disclosure surrounding the amount, timing and uncertainty of cash flows arising from leasing agreements. In July 2018, the FASB issued ASU No. 2018-11, which provided entities with an additional transition method. Under the new transition method, an entity initially applies the new standard at the adoption date, versus at the beginning of the earliest period presented, and recognizes a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The Company elected this transition method and adopted Topic 842 using a modified retrospective approach in the first quarter of fiscal 2020 with the cumulative effect of initially applying the new standard recognized in Retained earnings at June 1, 2019. Comparative prior period information has not been adjusted and continues to be reported in accordance with previous lease accounting guidance in Accounting Standards Codification (ASC) Topic 840 — Leases. Upon adoption, the Company elected the package of transition practical expedients which allowed the Company to carry forward prior conclusions related to: (i) whether any expired or existing contracts are or contain leases, (ii) the lease classification for any expired or existing leases and (iii) initial direct costs for existing leases. Additionally, the Company elected the practical expedient to not separate lease components from nonlease components for all real estate leases within the portfolio. The Company made an accounting policy election to not record leases with an initial term of 12 months or less on the Unaudited Condensed Consolidated Balance Sheets and will recognize related lease payments in the Unaudited Condensed Consolidated Statements of Income on a straight-line basis over the lease term. In preparation for implementation, the Company executed changes to business processes, including implementing a software solution to assist with the new reporting requirements. The adoption of Topic 842 resulted in a $2.7 billion increase to total assets and total liabilities as of June 1, 2019. Upon adoption, the Company recognized $3.2 billion of total operating lease liabilities and $2.9 billion of operating lease ROU assets, as well as removed $348 million of existing deferred rent liabilities, which was recorded as an offset against the ROU assets. In addition, the Company removed $184 million of existing assets and liabilities related to build-to-suit lease arrangements. Several other asset and liability line items in the Company's Unaudited Condensed Consolidated Balance Sheets were also impacted by immaterial amounts. The adoption of the standard did not have a material impact on the Unaudited Condensed Consolidated Statements of Income or Unaudited Condensed Consolidated Statements of Cash Flows. For more information on the Company's lease arrangements refer to Note 13 — Leases.
Fair Value Measurements	The Company measures certain financial assets and liabilities at fair value on a recurring basis, including derivatives, equity securities and available-for-sale debt securities.
Hedging Derivatives	CASH FLOW HEDGES All changes in fair value of derivatives designated as cash flow hedges are recorded in Accumulated other comprehensive income (loss) until Net income is affected by the variability of cash flows of the hedged transaction. Effective hedge results are classified in the Unaudited Condensed Consolidated Statements of Income in the same manner as the underlying exposure. Derivative instruments designated as cash flow hedges must be discontinued when it is no longer probable the forecasted hedged transaction will occur in the initially identified time period. The gains and losses associated with discontinued derivative instruments in Accumulated other comprehensive income (loss) will be recognized immediately in Other (income) expense, net, if it is probable the forecasted hedged transaction will not occur by the end of the initially identified time period or within an additional two-month period thereafter. In all situations in which hedge accounting is discontinued and the derivative remains outstanding, the Company accounts for the derivative as an undesignated instrument as discussed below.
Undesignated Derivative Instruments	UNDESIGNATED DERIVATIVE INSTRUMENTS The Company may elect to enter into foreign exchange forwards to mitigate the change in fair value of specific assets and liabilities on the Unaudited Condensed Consolidated Balance Sheets and/or the embedded derivative contracts. These undesignated instruments are recorded at fair value as a derivative asset or liability on the Unaudited Condensed Consolidated Balance Sheets with their corresponding change in fair value recognized in Other (income) expense, net, together with the re-measurement gain or loss from the hedged balance sheet position and/or embedded derivative contract.
Embedded Derivatives	EMBEDDED DERIVATIVES Embedded derivative contracts are treated as foreign currency forward contracts that are bifurcated from the related contract and recorded at fair value as a derivative asset or liability on the Unaudited Condensed Consolidated Balance Sheets with their corresponding change in fair value recognized in Other (income) expense, net, through the date the foreign currency fluctuations cease to exist.
Operating Leases	The Company primarily leases retail store space, certain distribution and warehouse facilities, office space, equipment and other non-real estate assets. The Company determines if an arrangement is a lease at inception and begins recording lease activity at the commencement date, which is generally the date in which the Company takes possession of or controls the physical use of the asset. ROU assets and lease liabilities are recognized based on the present value of lease payments over the lease term with lease expense recognized on a straight-line basis. The Company's incremental borrowing rate is used to determine the present value of future lease payments unless the implicit rate is readily determinable. As of and for the nine months ended February 29, 2020, finance leases were not a material component of the Company's lease portfolio. Lease agreements may contain rent escalation clauses, renewal or termination options, rent holidays or certain landlord incentives, including tenant improvement allowances. ROU assets include amounts for scheduled rent increases and are reduced by the amount of lease incentives. The lease term includes the non-cancelable period of the lease and options to extend or terminate the lease when it is reasonably certain the Company will exercise those options. Certain lease agreements include variable lease payments, which are based on a percent of retail sales over specified levels or adjust periodically for inflation as a result of changes in a published index, primarily the Consumer Price Index. Lease expense is recognized in Cost of sales or Operating overhead expense within the Unaudited Condensed Consolidated Statements of Income, based on the underlying nature of the leased asset.

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Feb. 29, 2020

BASIS OF PRESENTATION

The Unaudited Condensed Consolidated Financial Statements include the accounts of NIKE, Inc. and its subsidiaries (the “Company” or “NIKE”) and reflect all normal recurring adjustments which are, in the opinion of management, necessary for a fair statement of the results of operations for the interim period. The year-end Condensed Consolidated Balance Sheet data as of May 31, 2019 was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America (“U.S. GAAP”). The interim financial information and notes thereto should be read in conjunction with the Company's latest Annual Report on Form 10-K. The results of operations for the three and nine months ended February 29, 2020 are not necessarily indicative of results to be expected for the entire fiscal year.

Recently Adopted Accounting Standards

RECENTLY ADOPTED ACCOUNTING STANDARDS

In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-02, Leases (Topic 842), which replaced existing lease accounting guidance. The new standard is intended to provide enhanced transparency and comparability by requiring lessees to record right-of-use (ROU) assets and corresponding lease liabilities on the balance sheet. ROU assets represent the Company's right to use an underlying asset for the lease term and lease liabilities represent the Company's obligation to make lease payments arising from the lease. The new guidance requires the Company to continue to classify leases as either an operating or finance lease, with classification affecting the pattern of expense recognition in the income statement. In addition, the new standard requires enhanced disclosure surrounding the amount, timing and uncertainty of cash flows arising from leasing agreements.

In July 2018, the FASB issued ASU No. 2018-11, which provided entities with an additional transition method. Under the new transition method, an entity initially applies the new standard at the adoption date, versus at the beginning of the earliest period presented, and recognizes a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The Company elected this transition method and adopted Topic 842 using a modified retrospective approach in the first quarter of fiscal 2020 with the cumulative effect of initially applying the new standard recognized in Retained earnings at June 1, 2019. Comparative prior period information has not been adjusted and continues to be reported in accordance with previous lease accounting guidance in Accounting Standards Codification (ASC) Topic 840 — Leases.

Upon adoption, the Company elected the package of transition practical expedients which allowed the Company to carry forward prior conclusions related to: (i) whether any expired or existing contracts are or contain leases, (ii) the lease classification for any expired or existing leases and (iii) initial direct costs for existing leases. Additionally, the Company elected the practical expedient to not separate lease components from nonlease components for all real estate leases within the portfolio. The Company made an accounting policy election to not record leases with an initial term of 12 months or less on the Unaudited Condensed Consolidated Balance Sheets and will recognize related lease payments in the Unaudited Condensed Consolidated Statements of Income on a straight-line basis over the lease term.

In preparation for implementation, the Company executed changes to business processes, including implementing a software solution to assist with the new reporting requirements. The adoption of Topic 842 resulted in a $2.7 billion increase to total assets and total liabilities as of June 1, 2019. Upon adoption, the Company recognized $3.2 billion of total operating lease liabilities and $2.9 billion of operating lease ROU assets, as well as removed $348 million of existing deferred rent liabilities, which was recorded as an offset against the ROU assets. In addition, the Company removed $184 million of existing assets and liabilities related to build-to-suit lease arrangements. Several other asset and liability line items in the Company's Unaudited Condensed Consolidated Balance Sheets were also impacted by immaterial amounts. The adoption of the standard did not have a material impact on the Unaudited Condensed Consolidated Statements of Income or Unaudited Condensed Consolidated Statements of Cash Flows. For more information on the Company's lease arrangements refer to Note 13 — Leases.

Fair Value Measurements

The Company measures certain financial assets and liabilities at fair value on a recurring basis, including derivatives, equity securities and available-for-sale debt securities.

Hedging Derivatives

CASH FLOW HEDGES

All changes in fair value of derivatives designated as cash flow hedges are recorded in Accumulated other comprehensive income (loss) until Net income is affected by the variability of cash flows of the hedged transaction. Effective hedge results are classified in the Unaudited Condensed Consolidated Statements of Income in the same manner as the underlying exposure. Derivative instruments designated as cash flow hedges must be discontinued when it is no longer probable the forecasted hedged transaction will occur in the initially identified time period. The gains and losses associated with discontinued derivative instruments in Accumulated other comprehensive income (loss) will be recognized immediately in Other (income) expense, net, if it is probable the forecasted hedged transaction will not occur by the end of the initially identified time period or within an additional two-month period thereafter. In all situations in which hedge accounting is discontinued and the derivative remains outstanding, the Company accounts for the derivative as an undesignated instrument as discussed below.

Undesignated Derivative Instruments

UNDESIGNATED DERIVATIVE INSTRUMENTS

The Company may elect to enter into foreign exchange forwards to mitigate the change in fair value of specific assets and liabilities on the Unaudited Condensed Consolidated Balance Sheets and/or the embedded derivative contracts. These undesignated instruments are recorded at fair value as a derivative asset or liability on the Unaudited Condensed Consolidated Balance Sheets with their corresponding change in fair value recognized in Other (income) expense, net, together with the re-measurement gain or loss from the hedged balance sheet position and/or embedded derivative contract.

Embedded Derivatives

EMBEDDED DERIVATIVES

Embedded derivative contracts are treated as foreign currency forward contracts that are bifurcated from the related contract and recorded at fair value as a derivative asset or liability on the Unaudited Condensed Consolidated Balance Sheets with their corresponding change in fair value recognized in Other (income) expense, net, through the date the foreign currency fluctuations cease to exist.

Operating Leases

The Company primarily leases retail store space, certain distribution and warehouse facilities, office space, equipment and other non-real estate assets. The Company determines if an arrangement is a lease at inception and begins recording lease activity at the commencement date, which is generally the date in which the Company takes possession of or controls the physical use of the asset. ROU assets and lease liabilities are recognized based on the present value of lease payments over the lease term with lease expense recognized on a straight-line basis. The Company's incremental borrowing rate is used to determine the present value of future lease payments unless the implicit rate is readily determinable. As of and for the nine months ended February 29, 2020, finance leases were not a material component of the Company's lease portfolio.

Lease agreements may contain rent escalation clauses, renewal or termination options, rent holidays or certain landlord incentives, including tenant improvement allowances. ROU assets include amounts for scheduled rent increases and are reduced by the amount of lease incentives. The lease term includes the non-cancelable period of the lease and options to extend or terminate the lease when it is reasonably certain the Company will exercise those options. Certain lease agreements include variable lease payments, which are based on a percent of retail sales over specified levels or adjust periodically for inflation as a result of changes in a published index, primarily the Consumer Price Index.

Lease expense is recognized in Cost of sales or Operating overhead expense within the Unaudited Condensed Consolidated Statements of Income, based on the underlying nature of the leased asset.