Schedule II - Valuation and Qualifying Accounts (Detail) - Allowance for Sales Returns - USD ($) $ in Millions	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
BALANCE AT BEGINNING OF PERIOD		$ 330	$ 343
CHARGED TO COSTS AND EXPENSES			640
CHARGED TO OTHER ACCOUNTS			5
WRITE-OFFS, NET			(658)
BALANCE AT END OF PERIOD			330
Accounting Standards Update 2014-09
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
BALANCE AT BEGINNING OF PERIOD	$ 843	734
CHARGED TO COSTS AND EXPENSES	1,941	1,959
CHARGED TO OTHER ACCOUNTS	(31)	(30)
WRITE-OFFS, NET	(2,071)	(1,820)
BALANCE AT END OF PERIOD	$ 682	$ 843	$ 734