Financial Instruments, Foreign Exchange Risk Management (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Foreign Exchange Contracts [Line Items]
Average Maturity of Foreign Exchange Hedging Contracts - within Three Months	83.00%
Average Maturity of Foreign Exchange Hedging Contracts - within Three and Six Months	9.00%
Average Maturity of Foreign Exchange Hedging Contracts - within Six and Twelve Months	8.00%
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	$ 2,980
Fair Value Asset (Liability)	17	[1]
Foreign Currency Cash Flow Hedges [Abstract]
Net asset (Liability) fair value	19		26
Euro/U.K. Pound Sterling [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	627
Fair Value Asset (Liability)	(5)	[1]
Japanese Yen/U.S. Dollar [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	474
Fair Value Asset (Liability)	9	[1]
Japanese Yen / Euro [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	456
Fair Value Asset (Liability)	5	[1]
U S Dollar / Euro [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	440
Fair Value Asset (Liability)	2	[1]
Canadian Dollar/Euro [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	177
Fair Value Asset (Liability)	1	[1]
U K Pound Sterling / Euro [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	168
Fair Value Asset (Liability)	0	[1]
Mexican Peso / U. S. Dollar [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	69
Fair Value Asset (Liability)	2	[1]
Indian Rupee/U.S. Dollar [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	62
Fair Value Asset (Liability)	2	[1]
Euro Japanese Yen [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	51
Fair Value Asset (Liability)	0	[1]
Euro / Swiss Franc Member
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	48
Fair Value Asset (Liability)	0	[1]
Philippine Peso / U.S. Dollar [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	47
Fair Value Asset (Liability)	1	[1]
U.K. Pound Sterling / U.S. Dollar [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	43
Fair Value Asset (Liability)	0	[1]
U.S. Dollar / Japanese Yen [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	41
Fair Value Asset (Liability)	0	[1]
Euro /U.S. Dollar [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	37
Fair Value Asset (Liability)	0	[1]
All Other [Member]
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	240
Fair Value Asset (Liability)	$ 0	[1]

[1] (1)Represents the net receivable (payable) amount included in the Condensed Consolidated Balance Sheet at September 30, 2012.