Derivative Instruments and Hedging Activities (Outstanding Derivative Notionals and Terms by Type) (Details) In Millions, unless otherwise specified		12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2014 Libor USD Interest Rate Contract USD ($)	Dec. 31, 2014 Euribor EUR Interest Rate Contract USD ($)	Dec. 31, 2014 Euribor EUR Interest Rate Contract EUR (€)	Dec. 31, 2014 Chilean Unidad De Fomento CLF Cross Currency Interest Rate Contract USD ($)	Dec. 31, 2014 Chilean Unidad De Fomento CLF Cross Currency Interest Rate Contract CLF	Dec. 31, 2014 Current Notional Libor USD Interest Rate Contract USD ($)	Dec. 31, 2014 Current Notional Euribor EUR Interest Rate Contract USD ($)	Dec. 31, 2014 Current Notional Euribor EUR Interest Rate Contract EUR (€)	Dec. 31, 2014 Current Notional Chilean Unidad De Fomento CLF Cross Currency Interest Rate Contract USD ($)	Dec. 31, 2014 Current Notional Chilean Unidad De Fomento CLF Cross Currency Interest Rate Contract CLF
Derivative [Line Items]
Derivative, notional amount	$ 3,000	$ 3,047	$ 642	€ 531	$ 179	4	$ 2,382	$ 642	€ 531	$ 179	4
Weighted-Average Remaining Term		11 years	7 years	7 years	14 years	14 years
% of Debt Currently Hedged by Index		53.00%	83.00%	83.00%	82.00%	82.00%