Financial Instruments - Foreign Exchange Risk Management (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	$ 2,917
Fair Value Asset (Liability)	(64)	[1]
Average Maturity of Foreign Exchange Hedging Contracts - within Three Months	78.00%
Average Maturity of Foreign Exchange Hedging Contracts - within Three and Six Months	8.00%
Average Maturity of Foreign Exchange Hedging Contracts - within Six and Twelve Months	14.00%
Euro/U.K. Pound Sterling
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	639
Fair Value Asset (Liability)	1	[1]
Japanese Yen/U.S. Dollar
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	588
Fair Value Asset (Liability)	(27)	[1]
U.S. Dollar/Euro
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	495
Fair Value Asset (Liability)	(8)	[1]
Japanese Yen/Euro
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	416
Fair Value Asset (Liability)	(32)	[1]
U.K. Pound Sterling/Euro
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	190
Fair Value Asset (Liability)	2	[1]
Canadian Dollar/Euro
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	94
Fair Value Asset (Liability)	(1)	[1]
Euro/U.S. Dollar
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	60
Fair Value Asset (Liability)	1	[1]
Mexican Peso/U.S. Dollar
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	57
Fair Value Asset (Liability)	0	[1]
U.S. Dollar/Japanese Yen
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	45
Fair Value Asset (Liability)	0	[1]
Indian Rupee/U.S. Dollar
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	42
Fair Value Asset (Liability)	1	[1]
Philippine Peso/U.S. Dollar
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	41
Fair Value Asset (Liability)	(1)	[1]
Swiss Franc/Euro
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	38
Fair Value Asset (Liability)	0	[1]
Euro/Danish Krone
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	31
Fair Value Asset (Liability)	0	[1]
U.S. Dollar/Canadian Dollar
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	21
Fair Value Asset (Liability)	0	[1]
All Other
Summary of Foreign Exchange Hedging Positions [Abstract]
Gross Notional Value	160
Fair Value Asset (Liability)	$ 0	[1]

[1] (1)Represents the net receivable (payable) amount included in the Consolidated Balance Sheet at December 31, 2013.