Operating Segments and Related Information - Information by Operating Segments (Detail) - USD ($) $ in Millions	12 Months Ended
May 31, 2020	May 31, 2019	May 31, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 37,403	$ 39,117	$ 36,397
Interest expense (income), net	89	49	54
Income before income taxes	2,887	4,801	4,325
Additions to Long-lived Assets	1,124	1,075	1,194
Depreciation	721	705	747
Global Brand Divisions
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	30	42
Corporate
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	(11)	(7)	26
Earnings Before Interest and Taxes	(1,967)	(1,810)	(1,456)
Additions to Long-lived Assets	356	333	325
Depreciation	112	116	110
NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	35,568	37,218
Converse \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,846	1,906
NIKE Brand \| Global Brand Divisions
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	30	42	88
Earnings Before Interest and Taxes	(3,468)	(3,262)	(2,658)
Additions to Long-lived Assets	438	278	286
Depreciation	214	195	217
NIKE Brand \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	35,568	37,218	34,485
Additions to Long-lived Assets	756	724	847
Depreciation	584	558	604
Converse \| Converse \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,846	1,906	1,886
Earnings Before Interest and Taxes	297	303	310
Additions to Long-lived Assets	12	18	22
Depreciation	25	31	33
North America \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	14,484	15,902
North America \| NIKE Brand \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	14,484	15,902	14,855
Earnings Before Interest and Taxes	2,899	3,925	3,600
Additions to Long-lived Assets	110	117	196
Depreciation	148	149	160
Europe, Middle East & Africa \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	9,347	9,812
Europe, Middle East & Africa \| NIKE Brand \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	9,347	9,812	9,242
Earnings Before Interest and Taxes	1,541	1,995	1,587
Additions to Long-lived Assets	139	233	240
Depreciation	132	111	116
Greater China \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	6,679	6,208
Greater China \| NIKE Brand \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	6,679	6,208	5,134
Earnings Before Interest and Taxes	2,490	2,376	1,807
Additions to Long-lived Assets	28	49	76
Depreciation	44	50	56
Asia Pacific & Latin America \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	5,028	5,254
Asia Pacific & Latin America \| NIKE Brand \| NIKE Brand \| Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	5,028	5,254	5,166
Earnings Before Interest and Taxes	1,184	1,323	1,189
Additions to Long-lived Assets	41	47	49
Depreciation	$ 46	$ 53	$ 55

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

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

+ Details

Name:	us-gaap_Depreciation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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 of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentAdditions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&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: