Intangible Assets (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Definite-Lived Intangible Assets [Line Items]
Definite-Lived Intangible Assets, Gross Carrying Amount	$ 976	$ 976
Accumulated Amortization	(738)	(670)
Marketing agreements [Member]
Definite-Lived Intangible Assets [Line Items]
Definite-Lived Intangible Assets, Gross Carrying Amount	730	730
Accumulated Amortization	(602)	(545)
Contracts [Member]
Definite-Lived Intangible Assets [Line Items]
Definite-Lived Intangible Assets, Gross Carrying Amount	193	193
Accumulated Amortization	(83)	(72)
Other [Member]
Definite-Lived Intangible Assets [Line Items]
Definite-Lived Intangible Assets, Gross Carrying Amount	53	53
Accumulated Amortization	$ (53)	$ (53)