Schedule II - Valuation and Qualifying Accounts (Detail) - Allowance for Sales Returns - USD ($) $ in Millions	12 Months Ended
	May 31, 2019	May 31, 2018	May 31, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
BALANCE AT BEGINNING OF PERIOD	$ 330	$ 343	$ 444
CHARGED TO COSTS AND EXPENSES		640	696
Charged to Other Accounts		5	3
WRITE-OFFS, NET		(658)	(800)
BALANCE AT END OF PERIOD		330	$ 343
Accounting Standards Update 2014-09
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
BALANCE AT BEGINNING OF PERIOD	734
CHARGED TO COSTS AND EXPENSES	1,959
Charged to Other Accounts	(30)
WRITE-OFFS, NET	(1,820)
BALANCE AT END OF PERIOD	$ 843	$ 734