Accumulated Other Comprehensive Income - Changes in AOCI (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 31, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income balance at the beginning of the period	$ 274
Other comprehensive gains (losses) before reclassifications, net of tax	(166)	[1]
Reclassifications to net income of previously deferred (gains) losses, net of tax	(23)	[2]
Other comprehensive income (loss)	(189)
Accumulated other comprehensive income balance at the end of the period	85
Other comprehensive income, before reclassification, tax benefit (expense)	9
Reclassification from accumulated other comprehensive income, tax (benefit) expense	9
Foreign Currency Translation Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income balance at the beginning of the period	41	[3]
Other comprehensive gains (losses) before reclassifications, net of tax	(32)	[1],[3]
Reclassifications to net income of previously deferred (gains) losses, net of tax	0	[2],[3]
Other comprehensive income (loss)	(32)	[3]
Accumulated other comprehensive income balance at the end of the period	9	[3]
Other comprehensive income, before reclassification, tax benefit (expense)	0
Reclassification from accumulated other comprehensive income, tax (benefit) expense	0
Cash Flow Hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income balance at the beginning of the period	193
Other comprehensive gains (losses) before reclassifications, net of tax	(134)	[1]
Reclassifications to net income of previously deferred (gains) losses, net of tax	(27)	[2]
Other comprehensive income (loss)	(161)
Accumulated other comprehensive income balance at the end of the period	32
Other comprehensive income, before reclassification, tax benefit (expense)	9
Reclassification from accumulated other comprehensive income, tax (benefit) expense	9
Net Investment Hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income balance at the beginning of the period	95
Other comprehensive gains (losses) before reclassifications, net of tax	0	[1]
Reclassifications to net income of previously deferred (gains) losses, net of tax	0	[2]
Other comprehensive income (loss)	0
Accumulated other comprehensive income balance at the end of the period	95
Other comprehensive income, before reclassification, tax benefit (expense)	0
Reclassification from accumulated other comprehensive income, tax (benefit) expense	0
Other
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income balance at the beginning of the period	(55)
Other comprehensive gains (losses) before reclassifications, net of tax	0	[1]
Reclassifications to net income of previously deferred (gains) losses, net of tax	4	[2]
Other comprehensive income (loss)	4
Accumulated other comprehensive income balance at the end of the period	(51)
Other comprehensive income, before reclassification, tax benefit (expense)	0
Reclassification from accumulated other comprehensive income, tax (benefit) expense	$ 0

[1] Net of tax benefit of $0 million, $9 million, $0 million, $0 million, and $9 million, respectively.

[2] Net of tax expense of $0 million, $9 million, $0 million, $0 million, and $9 million, respectively.

[3] The accumulated foreign currency translation adjustment and net investment hedge gains/losses related to an investment in a foreign subsidiary are reclassified to Net income upon sale or upon complete or substantially complete liquidation of the respective entity.