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Revenue (Tables)
 6 Months Ended
Jun. 30, 2020
Revenue from Contract with Customer [Abstract]  
Operating Revenue by Geographic Region The table below presents the Company's operating revenue by principal geographic region (as defined by the U.S. Department of Transportation) (in millions):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2020
 
2019
 
2020
 
2019
Domestic (U.S. and Canada)
$
925

 
$
7,087

 
$
6,003

 
$
12,962

Atlantic
219

 
2,066

 
1,434

 
3,524

Pacific
258

 
1,306

 
1,064

 
2,587

Latin America
73

 
943

 
953

 
1,918

Total
$
1,475

 
$
11,402

 
$
9,454

 
$
20,991
Roll Forward of Frequent Flyer Deferred Revenue The table below presents a roll forward of Frequent flyer deferred revenue (in millions):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2020
 
2019
 
2020
 
2019
Total Frequent flyer deferred revenue - beginning balance
$
5,488

 
$
5,138

 
$
5,276

 
$
5,005

Total miles awarded
228

 
682

 
787

 
1,289

Travel miles redeemed (Passenger revenue)
(34
)
 
(589
)
 
(356
)
 
(1,027
)
Non-travel miles redeemed (Other operating revenue)
(12
)
 
(33
)
 
(37
)
 
(69
)
Total Frequent flyer deferred revenue - ending balance
$
5,670

 
$
5,198

 
$
5,670

 
$
5,198