Revenue Recognition - Revenue by Geographic Region (Details) - USD ($)
$ in Millions |
3 Months Ended |
9 Months Ended |
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
| Disaggregation of Revenue [Line Items] |
|
|
|
|
| Operating revenue |
$ 3,062
|
$ 12,560
|
$ 13,122
|
$ 35,568
|
| Domestic |
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
| Operating revenue |
2,585
|
8,665
|
10,116
|
24,990
|
| Atlantic |
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
| Operating revenue |
240
|
2,338
|
1,353
|
5,754
|
| Latin America |
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
| Operating revenue |
126
|
747
|
1,015
|
2,547
|
| Pacific |
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
| Operating revenue |
111
|
810
|
638
|
2,277
|
| Passenger |
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
| Operating revenue |
1,938
|
11,410
|
10,185
|
32,032
|
| Passenger | Domestic |
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
| Operating revenue |
1,647
|
7,985
|
7,812
|
22,819
|
| Passenger | Atlantic |
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
| Operating revenue |
132
|
2,062
|
1,014
|
5,009
|
| Passenger | Latin America |
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
| Operating revenue |
97
|
673
|
879
|
2,287
|
| Passenger | Pacific |
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
| Operating revenue |
$ 62
|
$ 690
|
$ 480
|
$ 1,917
|