Comprehensive Income, Net of Taxes (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Feb. 29, 2012		Feb. 28, 2011		Feb. 29, 2012		Feb. 28, 2011
Comprehensive Income (Loss) [Line Items]
Net income	$ 560		$ 523		$ 1,674		$ 1,539
Other comprehensive income (loss):
Changes in cumulative translation adjustment and other	41	[1]	76	[1]	(92)	[1]	180	[1]
Changes due to cash flow hedging instruments:
Net gain (loss) on hedge derivatives	(9)	[2]	(89)	[2]	152	[2]	(164)	[2]
Reclassification to net income of previously deferred losses (gains) related to hedge derivative instruments	(2)	[3]	(9)	[3]	65	[3]	(86)	[3]
Changes due to net investment hedges:
Net gain (loss) on hedge derivatives	(2)	[4]	(23)	[4]	23	[4]	(39)	[4]
Other comprehensive income (loss):	28		(45)		148		(109)
Total comprehensive income	$ 588		$ 478		$ 1,822		$ 1,430

[1] net of tax benefit (expense) of ($37) million, ($38) million, $29 million, and ($89) million, respectively.

[2] net of tax benefit (expense) of $3 million, $27 million, ($7) million, and $65 million, respectively.

[3] net of tax (benefit) expense of $0 million, $2 million, ($12) million, and $28 million, respectively.

[4] net of tax benefit (expense) of $0 million, $11 million, ($12) million, and $19 million, respectively.