Fair Value Measurements - Derivative Assets and Liabilities at Fair Value (Detail) - USD ($)	12 Months Ended
	May 31, 2017	May 31, 2016
Derivatives, Fair Value [Line Items]
Accrued Liabilities	$ 168,000,000	$ 162,000,000
Collateral received from counterparties to hedging instruments	0	105,000,000
Fair value transfers between fair value hierarchy levels	0	0
Fair Value, Measurements, Recurring
Derivatives, Fair Value [Line Items]
Reduction In derivative asset if netted	187,000,000	136,000,000
Fair Value, Measurements, Recurring | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Reduction in derivative liabilities if netted	187,000,000	136,000,000
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Derivatives, Fair Value [Line Items]
Assets at Fair Value	241,000,000	617,000,000
Other Current Assets	217,000,000	496,000,000
Other Long-term Assets	24,000,000	121,000,000
Liabilities at Fair Value	254,000,000	199,000,000
Accrued Liabilities	168,000,000	162,000,000
Other Long-term Liabilities	86,000,000	37,000,000
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Assets at Fair Value	231,000,000	603,000,000
Other Current Assets	216,000,000	487,000,000
Other Long-term Assets	15,000,000	116,000,000
Liabilities at Fair Value	246,000,000	145,000,000
Accrued Liabilities	166,000,000	115,000,000
Other Long-term Liabilities	80,000,000	30,000,000
Fair Value, Inputs, 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	1,000,000	2,000,000
Other Long-term Assets	9,000,000	5,000,000
Liabilities at Fair Value	8,000,000	9,000,000
Accrued Liabilities	2,000,000	2,000,000
Other Long-term Liabilities	6,000,000	7,000,000
Fair Value, Inputs, 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	0	45,000,000
Accrued Liabilities	0	45,000,000
Other Long-term Liabilities	0	0
Cash and Cash Equivalents
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments	0
Cash and Cash Equivalents | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments	0	105,000,000
Derivative liability, fair value of collateral	$ 0	0
Cash and Cash Equivalents | Interest rate swaps
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments		0
Derivative liability, fair value of collateral		$ 0