Fair Value Measurements - Derivative Assets and Liabilities at Fair Value (Detail) - USD ($)	Aug. 31, 2015		May. 31, 2015
Derivatives, Fair Value [Line Items]
Accrued Liabilities	$ 118,000,000		$ 162,000,000
Collateral received from counterparties to hedging instruments	468,000,000		968,000,000
Fair Value, Measurements, Recurring | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Reduction in derivative assets if netted	135,000,000		161,000,000
Reduction in derivative liabilities if netted	135,000,000		161,000,000
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring
Derivatives, Fair Value [Line Items]
Assets at Fair Value	1,154,000,000		1,639,000,000
Other Current Assets	851,000,000		1,114,000,000
Other Long-term Assets	303,000,000		525,000,000
Liabilities at Fair Value	147,000,000		175,000,000
Accrued Liabilities	118,000,000		162,000,000
Other Long-term Liabilities	29,000,000		13,000,000
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Assets at Fair Value	1,070,000,000	[1]	1,554,000,000	[2]
Other Current Assets	771,000,000	[1]	1,034,000,000	[2]
Other Long-term Assets	299,000,000	[1]	520,000,000	[2]
Liabilities at Fair Value	135,000,000	[1]	164,000,000	[2]
Accrued Liabilities	116,000,000	[1]	160,000,000	[2]
Other Long-term Liabilities	19,000,000	[1]	4,000,000	[2]
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring | Embedded derivatives
Derivatives, Fair Value [Line Items]
Assets at Fair Value	8,000,000		7,000,000
Other Current Assets	4,000,000		2,000,000
Other Long-term Assets	4,000,000		5,000,000
Liabilities at Fair Value	12,000,000		11,000,000
Accrued Liabilities	2,000,000		2,000,000
Other Long-term Liabilities	10,000,000		9,000,000
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring | Interest rate swap
Derivatives, Fair Value [Line Items]
Assets at Fair Value	76,000,000	[3]	78,000,000	[4]
Other Current Assets	76,000,000	[3]	78,000,000	[4]
Other Long-term Assets	0	[3]	0	[4]
Liabilities at Fair Value	0	[3]	0	[4]
Accrued Liabilities	0	[3]	0	[4]
Other Long-term Liabilities	0	[3]	0	[4]
Cash and Cash Equivalents
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments	468,000,000
Cash and Cash Equivalents | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments	417,000,000		900,000,000
Derivative liability, fair value of collateral	0		0
Cash and Cash Equivalents | Interest rate swap
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments	51,000,000		68,000,000
Accrued Liabilities
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments	$ 0
Securities Pledged as Collateral | Foreign exchange forwards and options
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 on the Unaudited Condensed Consolidated Balance Sheets, the asset and liability positions each would have been reduced by $135 million as of August 31, 2015. As of that date, the Company had received $417 million of cash collateral 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 August 31, 2015.

[2] If the foreign exchange derivative instruments had been netted on 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.

[3] As of August 31, 2015, the Company had received $51 million of cash collateral related to its interest rate swaps.

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