Net Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets, Net [Abstract]
Net carrying amount	$ 87	$ 100
Intangible Assets Amortization Expense [Abstract]
Pre-tax amortization expense	10	12	97
Amortization for current intangible assets, maximum forecasted	10
Forecasted amortization for each year thereafter	10
Automotive [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	179	194
Accumulated Amortization	(92)	(94)
Net carrying amount	87	100
Intangible Assets Amortization Expense [Abstract]
Pre-tax amortization expense	10	12	97
Automotive [Member] | License and Advertising Agreements [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	118	118
Accumulated Amortization	(54)	(47)
Net carrying amount	64	71
Automotive [Member] | Land Rights [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	23	23
Accumulated Amortization	(8)	(8)
Net carrying amount	15	15
Automotive [Member] | Patents [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	27	26
Accumulated Amortization	(20)	(17)
Net carrying amount	7	9
Automotive [Member] | Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	11	27
Accumulated Amortization	(10)	(22)
Net carrying amount	$ 1	$ 5
Minimum [Member] | Automotive [Member] | License and Advertising Agreements [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Asset, Useful Life	5 years
Minimum [Member] | Automotive [Member] | Land Rights [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Asset, Useful Life	40 years
Minimum [Member] | Automotive [Member] | Patents [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Asset, Useful Life	7 years
Maximum [Member] | Automotive [Member] | License and Advertising Agreements [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Asset, Useful Life	25 years
Maximum [Member] | Automotive [Member] | Land Rights [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Asset, Useful Life	50 years
Maximum [Member] | Automotive [Member] | Patents [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Asset, Useful Life	17 years