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Accumulated Other Comprehensive Income (Loss) (Notes)
6 Months Ended
Jun. 30, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Comprehensive Income (Loss) Note [Text Block] Accumulated Other Comprehensive Income (Loss)
Comprehensive income (loss) includes changes in fair value of our aircraft fuel derivatives which qualify for hedge accounting. A rollforward of the amounts included in accumulated other comprehensive income (loss), net of taxes for the three months ended June 30, 2020 and 2019 is as follows (in millions):

Aircraft Fuel Derivatives(1)(2)

Total
Balance of accumulated (loss), at March 31, 2020
$
(6
)

$
(6
)
Reclassifications into earnings, net of deferred taxes of $(1)
3


3

Change in fair value, net of deferred taxes of $0



Balance of accumulated (loss), at June 30, 2020
$
(3
)

$
(3
)






Balance of accumulated (loss), at March 31, 2019
$
(1
)

$
(1
)
Reclassifications into earnings, net of deferred taxes of $(1)
1


1

Change in fair value, net of deferred taxes of $0
1


1

Balance of accumulated income, at June 30, 2019
$
1


$
1


A rollforward of the amounts included in accumulated other comprehensive income (loss), net of taxes for the six months ended June 30, 2020 and 2019 is as follows (in millions):
 
Aircraft Fuel Derivatives(1)(2)
 
Total
Balance of accumulated income, at December 31, 2019
$
2

 
$
2

Reclassifications into earnings, net of deferred taxes of $(2)
6

 
6

Change in fair value, net of deferred taxes of $5
(11
)
 
(11
)
Balance of accumulated (loss), at June 30, 2020
$
(3
)
 
$
(3
)
 
 
 
 
Balance of accumulated (loss), at December 31, 2018
$
(3
)
 
$
(3
)
Reclassifications into earnings, net of deferred taxes $(1)
3

 
3

Change in fair value, net of deferred taxes of $0
1

 
1

Balance of accumulated income, at June 30, 2019
$
1

 
$
1

(1) Reclassified to aircraft fuel expense.
(2) We made several capacity reductions in response to the COVID-19 pandemic. These capacity reductions led to the discontinuance of hedge accounting on a number of our aircraft fuel derivatives as the forecasted consumption of aircraft fuel was no longer probable. Losses of $2 million and $4 million that were previously deferred in other comprehensive loss were reclassified to interest income and other during the three and six months ended June 30, 2020, respectively.