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Notional Values of Derivative Instruments (Detail) - USD ($)
$ in Millions
Jun. 30, 2016
Dec. 31, 2015
Net investment hedge | Euro notes    
Derivative [Line Items]    
Notional Amount $ 5,220 $ 4,345
Net investment hedge | Pound sterling notes    
Derivative [Line Items]    
Notional Amount 1,268 1,404
Net investment hedge | Swiss franc notes    
Derivative [Line Items]    
Notional Amount 1,511 1,073
Currency exchange contracts | Intercompany loans and forecasted interest payments    
Derivative [Line Items]    
Notional Amount 4,155 4,148
Currency exchange contracts | Forecasted transactions    
Derivative [Line Items]    
Notional Amount 1,491 1,094
Commodity contracts    
Derivative [Line Items]    
Notional Amount 747 732
Interest rate contracts    
Derivative [Line Items]    
Notional Amount $ 2,066 $ 3,033