Income Taxes Reconciliation of the Beginning and Ending Amount of Unrecognized Tax Benefits Table (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 13	$ 21
Changes in tax positions for prior years (increase)	1	0
Statute expiration	(8)	(8)
Balance at end of year	$ 6	$ 13