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v3.19.1

Special Charges and Mark-to-Market ("MTM") Adjustments - Narrative (Details) Employee in Thousands | 3 Months Ended
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Mar. 31, 2019 USD ($) | Mar. 31, 2018 USD ($) | Mar. 31, 2017 USD ($) Employee
Restructuring Cost and Reserve [Line Items] |  |  |
Fair value adjustment for aircraft purchased off lease and impairments related to certain fleet types and certain international slots no longer in use | $ 8,000,000 | $ 23,000,000 |
Severance and benefit costs | 6,000,000 | 14,000,000 |
Gain for the change in fair value of certain derivative assets | 3,000,000 |  |
Azul |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Gain (loss) for the change in fair value of equity investments | 14,000,000 | 45,000,000 |
Management |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance and benefit costs | 4,000,000 | 6,000,000 |
International Brotherhood of Teamsters | Voluntary Early-Out Program |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance and benefit costs | $ 2,000,000 | $ 8,000,000 |
Number of technicians and related employees electing to voluntarily separate from the Company | Employee |  |  | 1
Severance payment per participant (up to) |  |  | $ 100,000

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