Income Taxes Schedule of Components of Income Tax Expense (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:
Federal	$ 10	$ 16	$ 2
State and local	0	1	0
Current Income Tax Expense (Benefit)	10	17	2
Deferred:
Federal	4	30	43
State and local	7	17	13
deferred income tax expense	11	47	56
Income tax expense	$ 21	$ 64	$ 58