Debt - 2020-1 EETC (Details) - Secured Debt |
9 Months Ended |
|---|---|
|
Sep. 30, 2020
USD ($)
| |
| Pass Through Certificates Series 2020-1 | |
| Debt Instrument [Line Items] | |
| Debt instrument amount | $ 1,135,000,000 |
| Pass Through Certificates 2020-1 Class AA | |
| Debt Instrument [Line Items] | |
| Debt instrument amount | $ 796,000,000 |
| Fixed interest rate (percent) | 2.00% |
| Issuance date | Mar. 31, 2020 |
| Final maturity date | Jun. 30, 2028 |
| Pass Through Certificates 2020-1 Class A | |
| Debt Instrument [Line Items] | |
| Debt instrument amount | $ 204,000,000 |
| Fixed interest rate (percent) | 2.50% |
| Issuance date | Mar. 31, 2020 |
| Final maturity date | Jun. 30, 2028 |
| Pass Through Certificates 2020-1 Class B | |
| Debt Instrument [Line Items] | |
| Debt instrument amount | $ 135,000,000 |
| Fixed interest rate (percent) | 8.00% |
| Issuance date | Apr. 30, 2020 |
| Final maturity date | Jun. 30, 2027 |