Accumulated Other Comprehensive Income (Loss) - Changes in AOCI (Detail) - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2019	Aug. 31, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 9,040	$ 9,812
Other comprehensive income (loss):
Other comprehensive gains (losses) before reclassifications, net of tax	77	18
Reclassifications to net income of previously deferred (gains) losses, net of tax	(128)	44
Total other comprehensive income (loss), net of tax	(51)	62
Ending balance	9,200	8,992
Other comprehensive income, before reclassification, tax benefit (expense)	0	(1)
Reclassification from AOCI, current period, tax expense (benefit)	0	1
Foreign Currency Translation Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(346)	(173)
Other comprehensive income (loss):
Other comprehensive gains (losses) before reclassifications, net of tax	(89)	(128)
Reclassifications to net income of previously deferred (gains) losses, net of tax	0	0
Total other comprehensive income (loss), net of tax	(89)	(128)
Ending balance	(435)	(301)
Other comprehensive income, before reclassification, tax benefit (expense)	0	0
Reclassification from AOCI, current period, tax expense (benefit)	0	0
CASH FLOW HEDGES
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	520	17
Other comprehensive income (loss):
Other comprehensive gains (losses) before reclassifications, net of tax	163	142
Reclassifications to net income of previously deferred (gains) losses, net of tax	(127)	51
Total other comprehensive income (loss), net of tax	36	193
Ending balance	556	210
Other comprehensive income, before reclassification, tax benefit (expense)	0	(1)
Reclassification from AOCI, current period, tax expense (benefit)	0	1
Net Investment Hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	115	115
Other comprehensive income (loss):
Other comprehensive gains (losses) before reclassifications, net of tax	0	0
Reclassifications to net income of previously deferred (gains) losses, net of tax	0	0
Total other comprehensive income (loss), net of tax	0	0
Ending balance	115	115
Other comprehensive income, before reclassification, tax benefit (expense)	0	0
Reclassification from AOCI, current period, tax expense (benefit)	0	0
OTHER
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(58)	(51)
Other comprehensive income (loss):
Other comprehensive gains (losses) before reclassifications, net of tax	3	4
Reclassifications to net income of previously deferred (gains) losses, net of tax	(1)	(7)
Total other comprehensive income (loss), net of tax	2	(3)
Ending balance	(56)	(54)
Other comprehensive income, before reclassification, tax benefit (expense)	0	0
Reclassification from AOCI, current period, tax expense (benefit)	0	0
TOTAL
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	231	(92)
Other comprehensive income (loss):
Ending balance	$ 180	$ (30)