Operating Segments - Information by Operating Segments (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 10,326	$ 9,374	$ 20,986	$ 19,322
Interest expense (income), net	12	14	27	25
Income before income taxes	1,249	997	2,810	2,267
Global Brand Divisions
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	10	9	16	25
Corporate
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	2	3	11	7
EARNINGS BEFORE INTEREST AND TAXES	(413)	(423)	(837)	(825)
NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	9,844	8,946	19,940	18,363
Converse \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	480	425	1,035	952
NIKE Brand \| Global Brand Divisions
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	10	9	16	25
EARNINGS BEFORE INTEREST AND TAXES	(872)	(826)	(1,729)	(1,644)
NIKE Brand \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	9,844	8,946	19,940	18,363
Converse \| Converse \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	480	425	1,035	952
EARNINGS BEFORE INTEREST AND TAXES	90	44	228	142
North America \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	3,982	3,782	8,275	7,927
North America \| NIKE Brand \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	3,982	3,782	8,275	7,927
EARNINGS BEFORE INTEREST AND TAXES	875	884	1,975	1,961
Europe, Middle East & Africa \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	2,537	2,313	5,310	4,920
Europe, Middle East & Africa \| NIKE Brand \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	2,537	2,313	5,310	4,920
EARNINGS BEFORE INTEREST AND TAXES	510	450	1,119	951
Greater China \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,847	1,544	3,526	2,923
Greater China \| NIKE Brand \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,847	1,544	3,526	2,923
EARNINGS BEFORE INTEREST AND TAXES	694	561	1,363	1,063
Asia Pacific & Latin America \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,468	1,298	2,813	2,568
Asia Pacific & Latin America \| NIKE Brand \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,468	1,298	2,813	2,568
EARNINGS BEFORE INTEREST AND TAXES	$ 377	$ 321	$ 718	$ 644

Amount of income or loss before interest expense (income) and income taxes.

No definition available.

Name:	nke_EarningsBeforeInterestAndTaxes
Namespace Prefix:	nke_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The net amount of nonoperating interest income (expense).

+ References

No definition available.

+ Details

Name:	us-gaap_InterestIncomeExpenseNonoperatingNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_SegmentReportingRevenueReconcilingItemLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_MaterialReconcilingItemsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=nke_NIKEBrandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=nke_ConverseSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=nke_NIKEBrandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=nke_ConverseSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsegmentsAxis=nke_NorthAmericaSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsegmentsAxis=nke_EuropeMiddleEastAndAfricaSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsegmentsAxis=nke_GreaterChinaSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsegmentsAxis=nke_AsiaPacificAndLatinAmericaSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: