Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
NET INCOME	$ 1,044	$ 1,226	$ 2,156	$ 2,471
OTHER COMPREHENSIVE INCOME (LOSS):
Foreign currency translation adjustments, net of tax benefit of $4 and $4 in 2021 and tax expense of $6 and $4 in 2020	(94)	124	(241)	253
Amortization of prior service credit, net of tax benefit of $1 and $1 in 2021 and $0 and $1 in 2020	(2)	(2)	(4)	(4)
Other comprehensive income (loss)	(96)	122	(245)	249
COMPREHENSIVE INCOME	$ 948	$ 1,348	$ 1,911	$ 2,720