Reorganization Items (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Feb. 01, 2010 Revaluation of Liabilities
Fresh-Start Adjustment [Line Items]
Write-off of remaining unamortized debt fair value adjustment	$ 32
Professional fees	6
Total reorganization items	38	0	0
Fresh-start accounting discount recognized				$ 120