Fair Value Measurements - Derivative Assets and Liabilities at Fair Value (Detail) (USD $) In Millions, unless otherwise specified	Nov. 30, 2014		May 31, 2014
Derivatives, Fair Value [Line Items]
Accrued Liabilities	$ 55		$ 85
Collateral received from counterparties to foreign currency hedging instruments	170		0
Fair Value, Measurements, Recurring
Derivatives, Fair Value [Line Items]
Reduction in derivative assets if netted	58		63
Reduction in derivative liabilities if netted	58		63
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring
Derivatives, Fair Value [Line Items]
Assets at Fair Value	640		133
Other Current Assets	470		101
Other Long-term Assets	170		32
Liabilities at Fair Value	58		85
Accrued Liabilities	55		84
Other Long-term Liabilities	3		1
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Assets at Fair Value	635	[1]	127	[2]
Other Current Assets	465	[1]	101	[2]
Other Long-term Assets	170	[1]	26	[2]
Liabilities at Fair Value	58	[1]	85	[2]
Accrued Liabilities	55	[1]	84	[2]
Other Long-term Liabilities	3	[1]	1	[2]
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring | Embedded derivatives
Derivatives, Fair Value [Line Items]
Assets at Fair Value	1
Other Current Assets	1
Other Long-term Assets	0
Liabilities at Fair Value	0
Accrued Liabilities	0
Other Long-term Liabilities	0
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring | Interest rate swap contracts
Derivatives, Fair Value [Line Items]
Assets at Fair Value	4		6
Other Current Assets	4		0
Other Long-term Assets	0		6
Liabilities at Fair Value	0		0
Accrued Liabilities	0		0
Other Long-term Liabilities	0		0
Cash and Cash Equivalents and Accrued Liabilities | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to foreign currency hedging instruments	$ 170

[1] The Company’s derivative financial instruments are subject to master netting arrangements that allow for the offset of assets and liabilities in the event of default or early termination of the contract. The Company elects to record the gross assets and liabilities of its derivative financial instruments on the Unaudited Condensed Consolidated Balance Sheets. If the derivative financial instruments had been netted on the Unaudited Condensed Consolidated Balance Sheets, the asset and liability positions each would have been reduced by $58 million. At November 30, 2014, the Company had received from various counterparties $170 million of cash collateral; this amount has been recorded in Cash and equivalents and Accrued liabilities, the latter of which would also net against the Company's derivative asset balance. No amount of collateral was posted on the Company’s derivative liability balance.

[2] The Company’s derivative financial instruments are subject to master netting arrangements that allow for the offset of assets and liabilities in the event of default or early termination of the contract. The Company elects to record the gross assets and liabilities of its derivative financial instruments on the Consolidated Balance Sheets. If the derivative financial instruments had been netted on the Consolidated Balance Sheets, the asset and liability positions each would have been reduced by $63 million. No amounts of collateral were received or posted on the Company’s derivative assets and liabilities as of May 31, 2014.