Financial Instruments, Foreign Exchange Risk Management (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Foreign Exchange Contracts [Line Items]
Average Maturity of Foreign Exchange Hedging Contracts - within Three Months	81.00%
Average Maturity of Foreign Exchange Hedging Contracts - within Three and Six Months	10.00%
Average Maturity of Foreign Exchange Hedging Contracts - within Six and Twelve Months	9.00%
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	$ 2,826
Fair Value Asset (Liability)	(36)	[1]
Foreign Currency Cash Flow Hedges [Abstract]
Net liability fair value	(33)		(48)
Japanese Yen/U.S. Dollar [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	574
Fair Value Asset (Liability)	(10)	[1]
U S Dollar Euro [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	513
Fair Value Asset (Liability)	(9)	[1]
Euro/U.K. Pound Sterling [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	383
Fair Value Asset (Liability)	(2)	[1]
Japanese Yen Euro [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	367
Fair Value Asset (Liability)	(16)	[1]
U K Pound Sterling / U.S. Dollar [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	242
Fair Value Asset (Liability)	0	[1]
U.K. Pound Sterling/Euro [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	146
Fair Value Asset (Liability)	2	[1]
Canadian Dollar / Euro [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	97
Fair Value Asset (Liability)	0	[1]
Euro /U.S. Dollar [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	92
Fair Value Asset (Liability)	1	[1]
Mexican Peso /U.S. Dollar [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	67
Fair Value Asset (Liability)	(1)	[1]
Indian Rupee / U.S. Dollar [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	54
Fair Value Asset (Liability)	(1)	[1]
Philippine Peso / U.S. Dollar [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	47
Fair Value Asset (Liability)	0	[1]
U.S. Dollar / Japanese Yen [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	38
Fair Value Asset (Liability)	0	[1]
Euro / Danish Krone [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	28
Fair Value Asset (Liability)	0	[1]
U.S Dollar / Peruvian Nuevo Sol [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	26
Fair Value Asset (Liability)	0	[1]
All Other [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	152
Fair Value Asset (Liability)	$ 0	[1]

[1] (1)Represents the net receivable (payable) amount included in the Condensed Consolidated Balance Sheet at September 30, 2013.