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Accumulated Other Comprehensive Income (Loss) (Tables)
 12 Months Ended
Dec. 31, 2014
Equity [Abstract]  
Rollforward of the Amounts Included in AOCI, Net of Taxes
A rollforward of the amounts included in AOCI, net of taxes, is shown below for 2014 and 2013:

(in millions)
Fuel derivatives
 
Interest rate derivatives
 
Defined benefit plan items
 
Other
 
Deferred tax impact
 
Accumulated other
comprehensive income (loss)
Balance at December 31, 2012
$
(103
)

$
(108
)

$
26


$
(8
)

$
74

 
$
(119
)
changes in fair value
(82
)

22


39


16


—

 
(5
)
Reclassification to earnings
165


28


—


—


(72)

 
121

Balance at December 31, 2013
$
(20
)

$
(58
)

$
65


$
8


$
2


$
(3
)
changes in fair value
(1,191
)

(10
)

(24
)

—


454

 
(771
)
Reclassification to earnings
34


23


—


—


(21)

 
36

Balance at December 31, 2014
$
(1,177
)

$
(45
)

$
41


$
8


$
435


$
(738
)
Reclassification out of Accumulated Other Comprehensive Income
The following table illustrates the significant amounts reclassified out of each component of AOCI for the year ended December 31, 2014:

Year ended December 31, 2014
(in millions)
 
Amounts reclassified from AOCI
 
Affected line item in the Consolidated Statement of Comprehensive Income
AOCI components
 
 
Unrealized gain on fuel derivative instruments
 
$
34

 
Fuel and oil expense
 
 
12

 
Less: Tax expense
 
 
$
22

 
Net of tax
Unrealized gain on interest rate derivative instruments
 
$
23

 
Interest expense
 
 
9

 
Less: Tax expense
 
 
$
14

 
Net of tax
 
 
 
 
 
Total reclassifications for the period
 
$
36

 
Net of tax