Income Taxes (Schedule of Income Tax Expense (Benefit) Intraperiod Tax Allocation) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Continuing Operations [Member]
Income Tax [Line Items]
Deferred income tax liability, net of current	$ 1	$ 9	$ 42
Other Comprehensive Income (Loss) [Member]
Income Tax [Line Items]
Deferred income tax liability, net of current	$ (1)	$ (9)	$ (45)