Fair Value Measurements - Derivative Assets and Liabilities at Fair Value (Detail) - USD ($)	Aug. 31, 2016	May 31, 2016
Derivatives, Fair Value [Line Items]
Accrued Liabilities	$ 331,000,000	$ 162,000,000
Collateral received on derivative assets	0	105,000,000
Fair Value, Measurements, Recurring | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Reduction in derivative assets if netted	180,000,000	136,000,000
Reduction in derivative liabilities if netted	180,000,000	136,000,000
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring
Derivatives, Fair Value [Line Items]
Assets at Fair Value	487,000,000	617,000,000
Other Current Assets	390,000,000	496,000,000
Other Long-term Assets	97,000,000	121,000,000
Liabilities at Fair Value	368,000,000	199,000,000
Accrued Liabilities	331,000,000	162,000,000
Other Long-term Liabilities	37,000,000	37,000,000
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Assets at Fair Value	480,000,000	603,000,000
Other Current Assets	389,000,000	487,000,000
Other Long-term Assets	91,000,000	116,000,000
Liabilities at Fair Value	230,000,000	145,000,000
Accrued Liabilities	199,000,000	115,000,000
Other Long-term Liabilities	31,000,000	30,000,000
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	1,000,000	2,000,000
Other Long-term Assets	6,000,000	5,000,000
Liabilities at Fair Value	9,000,000	9,000,000
Accrued Liabilities	3,000,000	2,000,000
Other Long-term Liabilities	6,000,000	7,000,000
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring | Interest rate swaps
Derivatives, Fair Value [Line Items]
Assets at Fair Value	0	7,000,000
Other Current Assets	0	7,000,000
Other Long-term Assets	0	0
Liabilities at Fair Value	129,000,000	45,000,000
Accrued Liabilities	129,000,000	45,000,000
Other Long-term Liabilities	0	0
Cash and Cash Equivalents
Derivatives, Fair Value [Line Items]
Collateral posted on derivative liabilities	31,000,000
Cash and Cash Equivalents | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Collateral posted on derivative liabilities	23,000,000	0
Collateral received on derivative assets	0	105,000,000
Cash and Cash Equivalents | Interest rate swaps
Derivatives, Fair Value [Line Items]
Collateral posted on derivative liabilities	$ 8,000,000	0
Collateral received on derivative assets		$ 0