Fair Value Measurements - Derivative Assets and Liabilities at Fair Value (Detail) - USD ($)	Feb. 28, 2017	May 31, 2016
Derivatives, Fair Value [Line Items]
Accrued Liabilities	$ 118,000,000	$ 162,000,000
Collateral received on derivative assets	293,000,000	105,000,000
Fair Value, Measurements, Recurring | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Reduction in derivative assets if netted	114,000,000	136,000,000
Reduction in derivative liabilities if netted	114,000,000	136,000,000
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring
Derivatives, Fair Value [Line Items]
Assets at Fair Value	616,000,000	617,000,000
Other Current Assets	494,000,000	496,000,000
Other Long-term Assets	122,000,000	121,000,000
Liabilities at Fair Value	126,000,000	199,000,000
Accrued Liabilities	118,000,000	162,000,000
Other Long-term Liabilities	8,000,000	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	607,000,000	603,000,000
Other Current Assets	493,000,000	487,000,000
Other Long-term Assets	114,000,000	116,000,000
Liabilities at Fair Value	116,000,000	145,000,000
Accrued Liabilities	114,000,000	115,000,000
Other Long-term Liabilities	2,000,000	30,000,000
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring | Embedded derivatives
Derivatives, Fair Value [Line Items]
Assets at Fair Value	9,000,000	7,000,000
Other Current Assets	1,000,000	2,000,000
Other Long-term Assets	8,000,000	5,000,000
Liabilities at Fair Value	10,000,000	9,000,000
Accrued Liabilities	4,000,000	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		7,000,000
Other Current Assets		7,000,000
Other Long-term Assets		0
Liabilities at Fair Value		45,000,000
Accrued Liabilities		45,000,000
Other Long-term Liabilities		0
Cash and Cash Equivalents | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Collateral posted on derivative liabilities	0	0
Collateral received on derivative assets	$ 293,000,000	105,000,000
Cash and Cash Equivalents | Interest rate swaps
Derivatives, Fair Value [Line Items]
Collateral received on derivative assets		$ 0