Fair Value Measurements Derivative Assets and Liabilities at Fair Value (Detail) - USD ($)	12 Months Ended
	May. 31, 2015		May. 31, 2014
Derivatives, Fair Value [Line Items]
Accrued Liabilities	$ 162,000,000		$ 85,000,000
Collateral received from counterparties to hedging instruments	968,000,000		0
Fair Value Transfers Between Fair Value Hierarchy Levels	0		0
Assets, Fair Value Disclosure, Nonrecurring	0		0
Liabilities, Fair Value Disclosure, Nonrecurring	0		0
Fair Value, Measurements, Recurring
Derivatives, Fair Value [Line Items]
Reduction in derivative liabilities if netted	161,000,000		63,000,000
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring
Derivatives, Fair Value [Line Items]
Assets at Fair Value	1,639,000,000		133,000,000
Other Current Assets	1,114,000,000		101,000,000
Other Long-term Assets	525,000,000		32,000,000
Liabilities at Fair Value	175,000,000		85,000,000
Accrued Liabilities	162,000,000		84,000,000
Other Long-term Liabilities	13,000,000		1,000,000
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Assets at Fair Value	1,554,000,000	[1]	127,000,000	[2]
Other Current Assets	1,034,000,000	[1]	101,000,000	[2]
Other Long-term Assets	520,000,000	[1]	26,000,000	[2]
Liabilities at Fair Value	164,000,000	[1]	85,000,000	[2]
Accrued Liabilities	160,000,000	[1]	84,000,000	[2]
Other Long-term Liabilities	4,000,000	[1]	1,000,000	[2]
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring | Embedded derivatives
Derivatives, Fair Value [Line Items]
Assets at Fair Value	7,000,000
Other Current Assets	2,000,000
Other Long-term Assets	5,000,000
Liabilities at Fair Value	11,000,000
Accrued Liabilities	2,000,000
Other Long-term Liabilities	9,000,000
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring | Interest rate swaps
Derivatives, Fair Value [Line Items]
Assets at Fair Value	78,000,000	[3]	6,000,000
Other Current Assets	78,000,000	[3]	0
Other Long-term Assets	0	[3]	6,000,000
Liabilities at Fair Value	0	[3]	0
Accrued Liabilities	0	[3]	0
Other Long-term Liabilities	0	[3]	0
Cash and Cash Equivalents
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments	968,000,000
Cash and Cash Equivalents | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments	900,000,000		0
Derivative Liability, Fair Value of Collateral	0		$ 0
Cash and Cash Equivalents | Interest rate swaps
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments	68,000,000
Securities Pledged as Collateral
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments	74,000,000
Securities Pledged as Collateral | Interest rate swaps
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments	$ 74,000,000

[1] If the foreign exchange derivative instruments had been netted in the Consolidated Balance Sheets, the asset and liability positions each would have been reduced by $161 million as of May 31, 2015. As of that date, the Company had received $900 million of cash collateral and $74 million of securities from various counterparties related to these foreign exchange derivative instruments. No amount of collateral was posted on the Company’s derivative liability balance as of May 31, 2015.

[2] If the foreign exchange derivative financial instruments had been netted in the Consolidated Balance Sheets, the asset and liability positions each would have been reduced by $63 million as of May 31, 2014. No amounts of collateral were received or posted on the Company’s derivative assets and liabilities as of May 31, 2014.

[3] As of May 31, 2015, the Company had received $68 million of cash collateral related to its interest rate swaps.