Summary of Accounting Policies - Goodwill and Intangibles, Net (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2008
Accounting Policies [Abstract]
Goodwill impairment charge	$ 11	$ 0	$ 0	$ 11
Finite useful life of intangible assets, Minimum		5 years
Finite useful life of intangible assets, Maximum		50 years
Amortization of intangibles		5	5	2
Estimated amortization of intangible assets, 2014		3
Estimated amortization of intangible assets, 2015		5
Estimated amortization of intangible assets, 2016		4
Estimated amortization of intangible assets, 2017		3
Estimated amortization of intangible assets, 2018		2
Capitalization of indefinite life purchased trademarks					$ 1