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Notional Values of Derivative Instruments (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Net investment hedge | Euro notes    
Derivative [Line Items]    
Notional Amount $ 4,012 $ 4,345
Net investment hedge | Pound sterling notes    
Derivative [Line Items]    
Notional Amount 419 1,404
Net investment hedge | Swiss franc notes    
Derivative [Line Items]    
Notional Amount 1,447 1,073
Currency exchange contracts | Intercompany loans and forecasted interest payments    
Derivative [Line Items]    
Notional Amount 3,343 4,148
Currency exchange contracts | Forecasted transactions    
Derivative [Line Items]    
Notional Amount 1,452 1,094
Commodity contracts    
Derivative [Line Items]    
Notional Amount 837 732
Interest rate contracts    
Derivative [Line Items]    
Notional Amount $ 6,365 $ 3,033