Fair Value Measurements - Derivative Assets and Liabilities at Fair Value (Detail) - USD ($)	Nov. 30, 2019	May 31, 2019
Derivatives, Fair Value [Line Items]
ACCRUED LIABILITIES	$ 72,000,000	$ 52,000,000
Collateral received from counterparties to hedging instruments	122,000,000	289,000,000
Fair Value, Measurements, Recurring | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Reduction in derivative liabilities if netted	53,000,000	50,000,000
Reduction in derivative assets if netted	53,000,000	50,000,000
Cash and Cash Equivalents
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments	122,000,000
Cash and Cash Equivalents | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
Collateral received from counterparties to hedging instruments	122,000,000	289,000,000
Fair value of derivative liability collateral	0	0
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Derivatives, Fair Value [Line Items]
ASSETS AT FAIR VALUE	427,000,000	622,000,000
OTHER CURRENT ASSETS	393,000,000	616,000,000
OTHER LONG-TERM ASSETS	34,000,000	6,000,000
LIABILITIES AT FAIR VALUE	73,000,000	54,000,000
ACCRUED LIABILITIES	72,000,000	52,000,000
OTHER LONG-TERM LIABILITIES	1,000,000	2,000,000
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Foreign exchange forwards and options
Derivatives, Fair Value [Line Items]
ASSETS AT FAIR VALUE	427,000,000	611,000,000
OTHER CURRENT ASSETS	393,000,000	611,000,000
OTHER LONG-TERM ASSETS	34,000,000	0
LIABILITIES AT FAIR VALUE	73,000,000	51,000,000
ACCRUED LIABILITIES	72,000,000	51,000,000
OTHER LONG-TERM LIABILITIES	1,000,000	0
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Embedded derivatives
Derivatives, Fair Value [Line Items]
ASSETS AT FAIR VALUE	0	11,000,000
OTHER CURRENT ASSETS	0	5,000,000
OTHER LONG-TERM ASSETS	0	6,000,000
LIABILITIES AT FAIR VALUE	0	3,000,000
ACCRUED LIABILITIES	0	1,000,000
OTHER LONG-TERM LIABILITIES	$ 0	$ 2,000,000