Fair Value Measurements - Derivative Assets and Liabilities at Fair Value (Detail) - USD ($)	Aug. 31, 2017	May 31, 2017
Derivatives, Fair Value [Line Items]
Accrued Liabilities	$ 528,000,000	$ 168,000,000
Fair Value, Measurements, Recurring | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Reduction in derivative assets if netted	164,000,000	187,000,000
Reduction in derivative liabilities if netted	164,000,000	187,000,000
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring
Derivatives, Fair Value [Line Items]
Assets at Fair Value	193,000,000	241,000,000
Other Current Assets	176,000,000	217,000,000
Other Long-term Assets	17,000,000	24,000,000
Liabilities at Fair Value	716,000,000	254,000,000
Accrued Liabilities	528,000,000	168,000,000
Other Long-term Liabilities	188,000,000	86,000,000
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Assets at Fair Value	183,000,000	231,000,000
Other Current Assets	175,000,000	216,000,000
Other Long-term Assets	8,000,000	15,000,000
Liabilities at Fair Value	708,000,000	246,000,000
Accrued Liabilities	525,000,000	166,000,000
Other Long-term Liabilities	183,000,000	80,000,000
Fair Value Measurements Using Level 2 | Fair Value, Measurements, Recurring | Embedded derivatives
Derivatives, Fair Value [Line Items]
Assets at Fair Value	10,000,000	10,000,000
Other Current Assets	1,000,000	1,000,000
Other Long-term Assets	9,000,000	9,000,000
Liabilities at Fair Value	8,000,000	8,000,000
Accrued Liabilities	3,000,000	2,000,000
Other Long-term Liabilities	5,000,000	6,000,000
Cash and Cash Equivalents | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Collateral posted on derivative liabilities	273,000,000	0
Collateral received on derivative assets	$ 0	$ 0