Derivative Instruments and Hedging Activities (Outstanding Derivative Notionals and Terms by Type) (Details) $ in Millions	Dec. 31, 2016 USD ($)
Derivative [Line Items]
Derivative, notional amount	$ 3,600
Libor and Euribor [Member] | Interest Rate Contract
Derivative [Line Items]
Derivative, notional amount	3,581
Argentina, Pesos | Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, notional amount	171
Other unspecified currency [Domain] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, notional amount	749
Euro Member Countries, Euro | Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, notional amount	226
Unidad de Fomento (funds code) | Cross Currency Interest Rate Contract [Member]
Derivative [Line Items]
Derivative, notional amount	374
Unidad de Fomento (funds code) | Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, notional amount	$ 151