Fair Value Measurements - Derivative Assets and Liabilities at Fair Value (Detail) - USD ($)	Nov. 30, 2016	May 31, 2016
Derivatives, Fair Value [Line Items]
Accrued Liabilities	$ 88,000,000	$ 162,000,000
Collateral received on derivative assets	369,000,000	105,000,000
Fair Value, Measurements, Recurring | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Reduction in derivative assets if netted	92,000,000	136,000,000
Reduction in derivative liabilities if netted	92,000,000	136,000,000
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring
Derivatives, Fair Value [Line Items]
Assets at Fair Value	854,000,000	617,000,000
Other Current Assets	661,000,000	496,000,000
Other Long-term Assets	193,000,000	121,000,000
Liabilities at Fair Value	101,000,000	199,000,000
Accrued Liabilities	88,000,000	162,000,000
Other Long-term Liabilities	13,000,000	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	844,000,000	603,000,000
Other Current Assets	657,000,000	487,000,000
Other Long-term Assets	187,000,000	116,000,000
Liabilities at Fair Value	92,000,000	145,000,000
Accrued Liabilities	86,000,000	115,000,000
Other Long-term Liabilities	6,000,000	30,000,000
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring | Embedded derivatives
Derivatives, Fair Value [Line Items]
Assets at Fair Value	10,000,000	7,000,000
Other Current Assets	4,000,000	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	2,000,000	2,000,000
Other Long-term Liabilities	7,000,000	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	$ 369,000,000	105,000,000
Cash and Cash Equivalents | Interest rate swaps
Derivatives, Fair Value [Line Items]
Collateral received on derivative assets		$ 0