Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Feb. 28, 2022	Feb. 28, 2021
Statement Of Income And Comprehensive Income [Abstract]
NET INCOME	$ 1,112	$ 892	$ 3,268	$ 3,363
OTHER COMPREHENSIVE INCOME (LOSS):
Foreign currency translation adjustments, net of tax expense of $3 and tax benefit of $1 in 2022 and tax expense of $1 and $5 in 2021	91	136	(150)	389
Amortization of prior service credit, net of tax benefit of $1 and $2 in 2022 and $0 and $1 in 2021	(1)	(2)	(5)	(6)
Other comprehensive income (loss)	90	134	(155)	383
COMPREHENSIVE INCOME	$ 1,202	$ 1,026	$ 3,113	$ 3,746