Accumulated Other Comprehensive Income - Changes in AOCI (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 28, 2014		Feb. 28, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income balance at the beginning of the period	$ 90		$ 274
Other comprehensive gains (losses) before reclassifications, net of tax	(68)	[1]	(209)	[1]
Reclassifications to net income of previously deferred (gains) losses, net of tax	11	[2]	(32)	[2]
Other comprehensive income (loss)	(57)		(241)
Accumulated other comprehensive income balance at the end of the period	33		33
Other comprehensive income, before reclassification, tax benefit (expense)	5		12
Reclassification from accumulated other comprehensive income, tax (benefit) expense	(1)		9
Foreign Currency Translation Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income balance at the beginning of the period	24	[3]	41	[3]
Other comprehensive gains (losses) before reclassifications, net of tax	(34)	[1],[3]	(51)	[1],[3]
Reclassifications to net income of previously deferred (gains) losses, net of tax	0	[2],[3]	0	[2],[3]
Other comprehensive income (loss)	(34)	[3]	(51)	[3]
Accumulated other comprehensive income balance at the end of the period	(10)	[3]	(10)	[3]
Other comprehensive income, before reclassification, tax benefit (expense)	0		0
Reclassification from accumulated other comprehensive income, tax (benefit) expense	0		0
Cash Flow Hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income balance at the beginning of the period	28		193
Other comprehensive gains (losses) before reclassifications, net of tax	(31)	[1]	(151)	[1]
Reclassifications to net income of previously deferred (gains) losses, net of tax	10	[2]	(35)	[2]
Other comprehensive income (loss)	(21)		(186)
Accumulated other comprehensive income balance at the end of the period	7		7
Other comprehensive income, before reclassification, tax benefit (expense)	5		12
Reclassification from accumulated other comprehensive income, tax (benefit) expense	(1)		9
Net Investment Hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income balance at the beginning of the period	95	[3]	95	[3]
Other comprehensive gains (losses) before reclassifications, net of tax	0	[1],[3]	0	[1],[3]
Reclassifications to net income of previously deferred (gains) losses, net of tax	0	[2],[3]	0	[2],[3]
Other comprehensive income (loss)	0	[3]	0	[3]
Accumulated other comprehensive income balance at the end of the period	95	[3]	95	[3]
Other comprehensive income, before reclassification, tax benefit (expense)	0		0
Reclassification from accumulated other comprehensive income, tax (benefit) expense	0		0
Other
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income balance at the beginning of the period	(57)		(55)
Other comprehensive gains (losses) before reclassifications, net of tax	(3)	[1]	(7)	[1]
Reclassifications to net income of previously deferred (gains) losses, net of tax	1	[2]	3	[2]
Other comprehensive income (loss)	(2)		(4)
Accumulated other comprehensive income balance at the end of the period	(59)		(59)
Other comprehensive income, before reclassification, tax benefit (expense)	0		0
Reclassification from accumulated other comprehensive income, tax (benefit) expense	$ 0		$ 0

[1] Net of tax benefit (expense) of $0 million, $12 million, $0 million, $0 million, and $12 million, respectively.

[2] Net of tax (benefit) 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.