Fair Value Measurements - Derivative Assets and Liabilities at Fair Value (Detail) - USD ($)	Nov. 30, 2015		May. 31, 2015
Derivatives, Fair Value [Line Items]
Accrued Liabilities	$ 202,000,000		$ 162,000,000
Collateral received from counterparties to hedging instruments	725,000,000		968,000,000
Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Derivative liability, fair value of collateral	0
Interest rate swap
Derivatives, Fair Value [Line Items]
Derivative liability, fair value of collateral	0
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	196,000,000		161,000,000
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring
Derivatives, Fair Value [Line Items]
Assets at Fair Value	1,483,000,000		1,639,000,000
Other Current Assets	1,038,000,000		1,114,000,000
Other Long-term Assets	445,000,000		525,000,000
Liabilities at Fair Value	211,000,000		175,000,000
Accrued Liabilities	202,000,000		162,000,000
Other Long-term Liabilities	9,000,000		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	1,476,000,000	[1]	1,554,000,000	[2]
Other Current Assets	1,036,000,000	[1]	1,034,000,000	[2]
Other Long-term Assets	440,000,000	[1]	520,000,000	[2]
Liabilities at Fair Value	196,000,000	[1]	164,000,000	[2]
Accrued Liabilities	195,000,000	[1]	160,000,000	[2]
Other Long-term Liabilities	1,000,000	[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	7,000,000		7,000,000
Other Current Assets	2,000,000		2,000,000
Other Long-term Assets	5,000,000		5,000,000
Liabilities at Fair Value	10,000,000		11,000,000
Accrued Liabilities	2,000,000		2,000,000
Other Long-term Liabilities	8,000,000		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	0	[3]	78,000,000	[4]
Other Current Assets	0	[3]	78,000,000	[4]
Other Long-term Assets	0	[3]	0	[4]
Liabilities at Fair Value	5,000,000	[3]	0	[4]
Accrued Liabilities	5,000,000	[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	725,000,000
Cash and Cash Equivalents | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments	$ 725,000,000		900,000,000
Derivative liability, fair value of collateral			0
Cash and Cash Equivalents | Interest rate swap
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments			68,000,000
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 $196 million as of November 30, 2015. As of that date, the Company had received $725 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 November 30, 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 November 30, 2015, no amount of cash collateral had been posted on the derivative liability balance related to the Company's interest rate swaps.

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