Operating Segments and Related Information - Revenues by Major Product Line (Detail) - USD ($) $ in Millions	12 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2014
Revenue from External Customer [Line Items]
Revenues	$ 32,376	$ 30,601	$ 27,799
Footwear
Revenue from External Customer [Line Items]
Revenues	19,871	18,318	16,208
Apparel
Revenue from External Customer [Line Items]
Revenues	9,067	8,637	8,109
Equipment
Revenue from External Customer [Line Items]
Revenues	1,496	1,631	1,670
Other
Revenue from External Customer [Line Items]
Revenues	$ 1,942	$ 2,015	$ 1,812