Accumulated Other Comprehensive Income (Loss) - Changes in AOCI (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 9,351	$ 8,729	$ 9,040	$ 9,812
Other comprehensive income (loss):
Other comprehensive gains (losses) before reclassifications, net of tax	21	33	98	305
Reclassifications to net income of previously deferred (gains) losses, net of tax	(130)	(45)	(386)	(16)
Total other comprehensive income (loss), net of tax	(109)	(12)	(288)	289
Ending balance	9,045	8,961	9,045	8,961
Other comprehensive income, before reclassification, tax benefit (expense)	(1)	(1)	(8)	(5)
Reclassification from AOCI, current period, tax expense (benefit)	0	3	1	5
Gains (losses) on foreign currency translation adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(407)	(303)	(346)	(173)
Other comprehensive income (loss):
Other comprehensive gains (losses) before reclassifications, net of tax	(43)	79	(104)	(51)
Reclassifications to net income of previously deferred (gains) losses, net of tax	1	0	1	0
Total other comprehensive income (loss), net of tax	(42)	79	(103)	(51)
Ending balance	(449)	(224)	(449)	(224)
Other comprehensive income, before reclassification, tax benefit (expense)	0	0	0	0
Reclassification from AOCI, current period, tax expense (benefit)	0	0	0	0
CASH FLOW HEDGES
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	401	451	520	17
Other comprehensive income (loss):
Other comprehensive gains (losses) before reclassifications, net of tax	63	(43)	200	351
Reclassifications to net income of previously deferred (gains) losses, net of tax	(131)	(48)	(387)	(8)
Total other comprehensive income (loss), net of tax	(68)	(91)	(187)	343
Ending balance	333	360	333	360
Other comprehensive income, before reclassification, tax benefit (expense)	(1)	(1)	(8)	(5)
Reclassification from AOCI, current period, tax expense (benefit)	0	3	1	5
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	0
Reclassifications to net income of previously deferred (gains) losses, net of tax	0	0	0	0
Total other comprehensive income (loss), net of tax	0	0	0	0
Ending balance	115	115	115	115
Other comprehensive income, before reclassification, tax benefit (expense)	0	0	0	0
Reclassification from AOCI, current period, tax expense (benefit)	0	0	0	0
OTHER
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(57)	(54)	(58)	(51)
Other comprehensive income (loss):
Other comprehensive gains (losses) before reclassifications, net of tax	1	(3)	2	5
Reclassifications to net income of previously deferred (gains) losses, net of tax	0	3	0	(8)
Total other comprehensive income (loss), net of tax	1	0	2	(3)
Ending balance	(56)	(54)	(56)	(54)
Other comprehensive income, before reclassification, tax benefit (expense)	0	0	0	0
Reclassification from AOCI, current period, tax expense (benefit)	0	0	0	0
TOTAL
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	52	209	231	(92)
Other comprehensive income (loss):
Ending balance	$ (57)	$ 197	$ (57)	$ 197