Summary of Significant Accounting Policies - Revisions (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended			6 Months Ended	9 Months Ended		12 Months Ended
	Feb. 28, 2015	Aug. 31, 2014	Feb. 28, 2014	Nov. 30, 2014	Feb. 28, 2015	Feb. 28, 2014	May 31, 2014	May 31, 2013	May 31, 2012
Net Income (Loss) [Abstract]
Total selling and administrative expense	$ 2,379		$ 2,169		$ 7,297	$ 6,318
Total before tax	1,046		880		3,153	2,632
Income tax expense	255		198		745	637
Net income	791	962	682	1,617	2,408	1,995	2,693	2,472	2,211
Basic earnings per common share for NIKE, Inc. (in dollars per share)	$ 0.92		$ 0.77		$ 2.79	$ 2.25
Diluted earnings per common share for NIKE, Inc. (in dollars per share)	$ 0.89		$ 0.75		$ 2.72	$ 2.19
Comprehensive Income [Abstract]
Net income	791	962	682	1,617	2,408	1,995	2,693	2,472	2,211
TOTAL COMPREHENSIVE INCOME	1,377		625		3,434	1,754
Cash provided by operations:
Net income	791	962	682	1,617	2,408	1,995	2,693	2,472	2,211
Amortization and other		8		15	28	53	68	64	68
Net foreign currency adjustments		53		243	411	59	56	66	63
(Increase) in inventories					(510)	(349)
Increase (decrease) in accounts payable, accrued liabilities and income taxes payable					505	(49)
Cash provided by operations		683		1,547	3,338	1,685	3,013	3,032	1,932
Cash used by investing activities:
Purchases of short-term investments					(3,754)	(4,235)
Maturities of short-term investments					(2,624)	(2,885)
Sales of short-term investments					1,718	789
Increase in other assets, net of other liabilities					0	(1)
Cash (used) provided by investing activities					(382)	(1,231)
Effect of exchange rate changes on cash and equivalents		2		(24)	(66)	(10)	(9)	36	(41)
Cash used by financing activities:
Net increase (decrease) in cash and equivalents		83		53	795	(1,473)	(1,117)	1,083	377
Cash and equivalents, beginning of period	2,273	2,220		2,220	2,220	3,337	3,337	2,254	1,877
CASH AND EQUIVALENTS, END OF PERIOD	3,015	2,303	1,864	2,273	3,015	1,864	2,220	3,337	2,254
As Reported
Net Income (Loss) [Abstract]
Total selling and administrative expense			2,166			6,310
Total before tax			883			2,640
Income tax expense			198			638
Net income		962	685	1,617		2,002	2,693	2,472	2,211
Basic earnings per common share for NIKE, Inc. (in dollars per share)			$ 0.78			$ 2.26
Diluted earnings per common share for NIKE, Inc. (in dollars per share)			$ 0.76			$ 2.20
Comprehensive Income [Abstract]
Net income		962	685	1,617		2,002	2,693	2,472	2,211
TOTAL COMPREHENSIVE INCOME			628			1,761
Cash provided by operations:
Net income		962	685	1,617		2,002	2,693	2,472	2,211
Amortization and other		(34)		(54)		102	114	66	23
Net foreign currency adjustments		0		0		0	0	0	0
(Increase) in inventories						(343)
Increase (decrease) in accounts payable, accrued liabilities and income taxes payable						(54)
Cash provided by operations		588		1,235		1,683	3,003	2,968	1,824
Cash used by investing activities:
Purchases of short-term investments						(4,146)
Maturities of short-term investments						(3,030)
Sales of short-term investments						555
Increase in other assets, net of other liabilities						(16)
Cash (used) provided by investing activities						(1,246)
Effect of exchange rate changes on cash and equivalents		97		288		7	1	100	67
Cash used by financing activities:
Net increase (decrease) in cash and equivalents		83		53		(1,473)	(1,117)	1,083	377
Cash and equivalents, beginning of period		2,220		2,220	2,220	3,337	3,337	2,254	1,877
CASH AND EQUIVALENTS, END OF PERIOD		2,303	1,864	2,273		1,864	2,220	3,337	2,254
Adjustment
Net Income (Loss) [Abstract]
Total selling and administrative expense			3			8
Total before tax			(3)			(8)
Income tax expense			0			(1)
Net income		0	(3)	0		(7)	0	0	0
Basic earnings per common share for NIKE, Inc. (in dollars per share)			$ (0.01)			$ (0.01)
Diluted earnings per common share for NIKE, Inc. (in dollars per share)			$ (0.01)			$ (0.01)
Comprehensive Income [Abstract]
Net income		0	(3)	0		(7)	0	0	0
TOTAL COMPREHENSIVE INCOME			(3)			(7)
Cash provided by operations:
Net income		0	(3)	0		(7)	0	0	0
Amortization and other		42		69		(49)	(46)	(2)	45
Net foreign currency adjustments		53		243		59	56	66	63
(Increase) in inventories						(6)
Increase (decrease) in accounts payable, accrued liabilities and income taxes payable						5
Cash provided by operations						2
Cash used by investing activities:
Purchases of short-term investments						(89)
Maturities of short-term investments						145
Sales of short-term investments						234
Increase in other assets, net of other liabilities						15
Cash (used) provided by investing activities						15
Cash used by financing activities:
Net increase (decrease) in cash and equivalents		0		0		0	0	0	0
Cash and equivalents, beginning of period		0		0	0	0	0	0	0
CASH AND EQUIVALENTS, END OF PERIOD		0	0	0		0	0	0	0
Prior Period Revisions to Foreign Currency Adjustments | Adjustment
Cash provided by operations:
Cash provided by operations		95		312		17	10	64	108
Cash used by investing activities:
Effect of exchange rate changes on cash and equivalents		(95)		(312)		(17)	(10)	(64)	(108)
Prior Year Revision To Capitalized Costs | Adjustment
Net Income (Loss) [Abstract]
Net income			(3)			(7)
Comprehensive Income [Abstract]
Net income			(3)			(7)
Cash provided by operations:
Net income			(3)			(7)
Cash provided by operations						(15)
Cash used by investing activities:
Cash (used) provided by investing activities						(15)
Prior Year Revision To Short-term Investments | Adjustment
Cash used by investing activities:
Purchases of short-term investments						(89)
Maturities of short-term investments						145
Sales of short-term investments						$ 234