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Fair Value Measurements - Derivative Assets and Liabilities at Fair Value (Detail) - USD ($)
May 31, 2018
May 31, 2017
Derivatives, Fair Value [Line Items]    
Accrued Liabilities $ 184,000,000 $ 168,000,000
Collateral received from counterparties to hedging instruments 23,000,000 0
Fair Value, Measurements, Recurring    
Derivatives, Fair Value [Line Items]    
Reduction in derivative assets if netted 182,000,000 187,000,000
Fair Value, Measurements, Recurring | Foreign exchange forwards and options    
Derivatives, Fair Value [Line Items]    
Reduction in derivative liabilities if netted 182,000,000 187,000,000
Cash and Cash Equivalents    
Derivatives, Fair Value [Line Items]    
Collateral received from counterparties to hedging instruments 23,000,000  
Cash and Cash Equivalents | Foreign exchange forwards and options    
Derivatives, Fair Value [Line Items]    
Collateral received from counterparties to hedging instruments 23,000,000 0
Derivative liability, fair value of collateral 0 0
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring    
Derivatives, Fair Value [Line Items]    
Assets at Fair Value 400,000,000 241,000,000
Other Current Assets 240,000,000 217,000,000
Other Long-term Assets 160,000,000 24,000,000
Liabilities at Fair Value 190,000,000 254,000,000
Accrued Liabilities 184,000,000 168,000,000
Other Long-term Liabilities 6,000,000 86,000,000
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Foreign exchange forwards and options    
Derivatives, Fair Value [Line Items]    
Assets at Fair Value 389,000,000 231,000,000
Other Current Assets 237,000,000 216,000,000
Other Long-term Assets 152,000,000 15,000,000
Liabilities at Fair Value 182,000,000 246,000,000
Accrued Liabilities 182,000,000 166,000,000
Other Long-term Liabilities 0 80,000,000
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Embedded derivatives    
Derivatives, Fair Value [Line Items]    
Assets at Fair Value 11,000,000 10,000,000
Other Current Assets 3,000,000 1,000,000
Other Long-term Assets 8,000,000 9,000,000
Liabilities at Fair Value 8,000,000 8,000,000
Accrued Liabilities 2,000,000 2,000,000
Other Long-term Liabilities $ 6,000,000 $ 6,000,000