Income Taxes (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Income Taxes (Textual) [Abstract]
Unrecognized tax benefits		$ 7
Impact of unrecognized tax benefits if recognized		5
Accrued interest and penalties	$ 2
Jurisdictions statutes of limitations expiration period	12 months
Minimum [Member]
Income Taxes (Textual) [Abstract]
Foreign, U.S. state and local jurisdictions statutes of limitations	3 years
Maximum [Member]
Income Taxes (Textual) [Abstract]
Foreign, U.S. state and local jurisdictions statutes of limitations	4 years