Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Intangible assets with definite lives, Total
Gross Carrying Amount	$ 79		$ 79		$ 79
Accumulated Amortization	(43)		(43)		(39)
Net	36		36		40
Intangible Assets with indefinite lives, Total
Gross Carrying Amount	30		30		30
Impairment Charges
Net	30		30		30
Estimated annual amortization expense intangible assets
Estimated future amortization expense, 2012	4		4
Estimated future amortization expense, 2013	7		7
Estimated future amortization expense, 2014	7		7
Estimated future amortization expense, 2015	7		7
Estimated future amortization expense, 2016	7		7
Estimated future amortization expense, 2017	4		4
Intangible Assets (Textual) [Abstract]
Amortization expense of intangible assets	2	2	4	4
Trade names [Member]
Intangible Assets with indefinite lives, Total
Gross Carrying Amount	22		22		22
Impairment Charges
Net	22		22		22
Other Indefinite Lived Intangible Assets [Member]
Intangible Assets with indefinite lives, Total
Gross Carrying Amount	8		8		8
Impairment Charges
Net	8		8		8
Customer relationships [Member]
Intangible assets with definite lives, Total
Gross Carrying Amount	70		70		70
Accumulated Amortization	(37)		(37)		(34)
Net	33		33		36
Other [Member]
Intangible assets with definite lives, Total
Gross Carrying Amount	9		9		9
Accumulated Amortization	(6)		(6)		(5)
Net	$ 3		$ 3		$ 4