Accumulated Other Comprehensive Income (Loss) - Changes in AOCI (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 10,640	$ 9,351	$ 8,055	$ 9,040
Other comprehensive income (loss):
Other comprehensive gains (losses) before reclassifications, net of tax	(70)	21	(278)	98
Reclassifications to net income of previously deferred (gains) losses, net of tax	53	(130)	(112)	(386)
Total other comprehensive income (loss), net of tax	(17)	(109)	(390)	(288)
Ending balance	11,931	9,045	11,931	9,045
Other comprehensive income, before reclassification, tax benefit (expense)	(2)	(1)	(1)
Reclassification from AOCI, current period, tax expense (benefit)	0	0	7
Gains (losses) on foreign currency translation adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(98)	(407)	(494)	(346)
Other comprehensive income (loss):
Other comprehensive gains (losses) before reclassifications, net of tax	99	(43)	496	(104)
Reclassifications to net income of previously deferred (gains) losses, net of tax	(1)	1	(2)	1
Total other comprehensive income (loss), net of tax	98	(42)	494	(103)
Ending balance	0	(449)	0	(449)
Other comprehensive income, before reclassification, tax benefit (expense)	0	0	0
Reclassification from AOCI, current period, tax expense (benefit)	0	0	0
CASH FLOW HEDGES
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(371)	401	390	520
Other comprehensive income (loss):
Other comprehensive gains (losses) before reclassifications, net of tax	(163)	63	(753)	200
Reclassifications to net income of previously deferred (gains) losses, net of tax	46	(131)	(125)	(387)
Total other comprehensive income (loss), net of tax	(117)	(68)	(878)	(187)
Ending balance	(488)	333	(488)	333
Other comprehensive income, before reclassification, tax benefit (expense)	(3)	(1)	(3)
Reclassification from AOCI, current period, tax expense (benefit)	0	0	7
Net Investment Hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	115	115	115	115
Other comprehensive income (loss):
Other comprehensive gains (losses) before reclassifications, net of tax	0	0		0
Reclassifications to net income of previously deferred (gains) losses, net of tax	0	0		0
Total other comprehensive income (loss), net of tax	0	0		0
Ending balance	115	115	115	115
Other comprehensive income, before reclassification, tax benefit (expense)	0	0	0
Reclassification from AOCI, current period, tax expense (benefit)	0	0	0
OTHER
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(75)	(57)	(67)	(58)
Other comprehensive income (loss):
Other comprehensive gains (losses) before reclassifications, net of tax	(6)	1	(21)	2
Reclassifications to net income of previously deferred (gains) losses, net of tax	8	0	15	0
Total other comprehensive income (loss), net of tax	2	1	(6)	2
Ending balance	(73)	(56)	(73)	(56)
Other comprehensive income, before reclassification, tax benefit (expense)	1	0	2
Reclassification from AOCI, current period, tax expense (benefit)	0	0	0
TOTAL
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(429)	52	(56)	231
Other comprehensive income (loss):
Ending balance	$ (446)	$ (57)	$ (446)	$ (57)