Consolidated Statements of Changes in Equity (Unaudited) (Successor, USD $) In Millions	Successor USD ($)	Successor Member's Equity USD ($)	Successor Accumulated Other Comprehensive Income (Loss) USD ($)
Balance at Dec. 31, 2010	$ 35,507	$ 35,480	$ 27
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash distributions to Parent	(2,750)	(2,750)	0
Comprehensive income:
Net income	2,063	2,063	0
Change in fuel hedge mark-to-market, net of tax benefit of $21	(34)	0	(34)
Total comprehensive income	2,029
Balance at Sep. 30, 2011	34,786	34,793	(7)
Balance at Jun. 30, 2011
Comprehensive income:
Net income	766
Balance at Sep. 30, 2011	$ 34,786