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Summary of Gains and Losses on Derivative Instruments (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) recognized in OCI $ (30) $ (8)
Gains (losses) on hedging activities reclassified from AOCI to net income, before tax (4) 2
Gain (loss) recognized in income, fair value hedges 4 1
Other (income) expense, net | Not Designated as Hedging Instrument    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) recognized in income, undesignated derivative instruments (17)  
Cash Flow Hedging | Foreign exchange contract    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) recognized in OCI (9) (8)
Cash Flow Hedging | Foreign exchange contract | Cost of sales    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on hedging activities reclassified from AOCI to net income, before tax (4) 2
Net investment hedge    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) recognized in OCI (21)  
Fair value hedges | Net Interest Expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) recognized in income, fair value hedges $ (4) $ (1)