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Accumulated Other Comprehensive Income
 12 Months Ended
Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income
 
The following table provides the components of accumulated other comprehensive (loss) income (in millions):
 
 
Successor
 
 
December 31,
2011
 
December 31,
2010
Unrecognized actuarial losses and prior service credit, net of tax (see Note 15)
 
$
(213
)
 
$
(13
)
Fuel/interest hedge mark-to-market, net of tax (see Note 6)
 
11

 
41

Accumulated other comprehensive loss of equity method investees
 
(1
)
 
(1
)
      Total accumulated other comprehensive (loss) income
 
$
(203
)
 
$
27