Derivative Financial Instruments (Schedule of Notional Amounts of Net Foreign Exchange Exposure by Currency) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Derivative [Line Items]
Total	$ (338)
Euro [Member]
Derivative [Line Items]
Total	(348)
British Pound Sterling [Member]
Derivative [Line Items]
Total	(10)
Chinese Renminbi [Member]
Derivative [Line Items]
Total	(84)
Mexican Peso [Member]
Derivative [Line Items]
Total	19
Singapore Dollar [Member]
Derivative [Line Items]
Total	43
Canadian Dollar [Member]
Derivative [Line Items]
Total	42
Japanese Yen [Member]
Derivative [Line Items]
Total	1
Brazilian Real [Member]
Derivative [Line Items]
Total	(11)
Swedish Krona [Member]
Derivative [Line Items]
Total	5
Other Currencies [Member]
Derivative [Line Items]
Total	$ 5