Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2021	Aug. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
NET INCOME	$ 1,112	$ 1,245
OTHER COMPREHENSIVE INCOME (LOSS):
Foreign currency translation adjustments, net of tax benefit of $0 in 2021 and $2 in 2020	(147)	129
Amortization of prior service credit, net of tax benefit of $0 in 2021 and $1 in 2020	(2)	(2)
Other comprehensive income (loss)	(149)	127
COMPREHENSIVE INCOME	$ 963	$ 1,372