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Special Charges (Credit) - Narrative (Details) employee in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jul. 31, 2020 employee | Sep. 30, 2020 USD ($) employee | Sep. 30, 2019 USD ($) | Mar. 31, 2017 USD ($) employee | Sep. 30, 2020 USD ($) employee | Sep. 30, 2019 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Cash received under the Payroll Support Program |  | $ 5,100,000,000 |  |  | $ 5,100,000,000 |
Cash received from grants |  | 3,600,000,000 |  |  | 3,600,000,000 |
Cash received from the issuance of an unsecured loan |  | 1,500,000,000 |  |  | 1,500,000,000 |
Cash received from the issuance of warrants |  |  |  |  | 66,000,000 |
Portion of grant recognized as a credit to special charges due to COVID-19 |  | 1,494,000,000 | $ 0 |  | 3,083,000,000 | $ 0
Deferred credit |  | $ (453,000,000) |  |  | $ (453,000,000) |
Number of employees notified of plans for workforce reduction | employee | 36 |  |  |  |  |
Number of employee furloughs | employee |  | 13 |  |  | 13 |
Number of employees subject to voluntary options | employee |  | 9 |  |  | 9 |
Severance and benefit costs |  | $ 350,000,000 | 2,000,000 |  | $ 413,000,000 | 14,000,000
Settlement losses |  | 415,000,000 | 0 |  | 646,000,000 | 0
Nonoperating unrealized losses on investments |  |  | (21,000,000) |  | 295,000,000 | (72,000,000)
Nonoperating credit loss on BRW Term Loan and related guarantee |  | 0 | 0 |  | 697,000,000 | 0
Charge for the early termination of several regional aircraft finance leases |  |  |  |  |  | 6,000,000
Fair value adjustment for aircraft purchased off lease |  |  |  |  |  | 8,000,000
Other miscellaneous impairments |  |  |  |  |  | 8,000,000
Gain (loss) for the change in fair value of equity investments |  |  | 25,000,000 |  |  | 77,000,000
Loss recorded for the change in fair value of certain derivative assets |  |  | 4,000,000 |  |  | 5,000,000
Investments excluding AVH Derivative Assets |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Nonoperating unrealized losses on investments |  | (15,000,000) |  |  | 271,000,000 |
AVH Derivative Assets |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Nonoperating unrealized losses on investments |  |  |  |  | 24,000,000 |
Management |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Severance and benefit costs |  |  | $ 2,000,000 |  |  | 12,000,000
Voluntary Early-Out Program | International Brotherhood of Teamsters |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Severance and benefit costs |  |  |  |  |  | 2,000,000
Number of technicians and related employees that elected to voluntarily separate from the Company | employee |  |  |  | 1 |  |
Maximum severance payment per employee (up to) |  |  |  | $ 100,000 |  |
Term Loan Receivable | BRW |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Nonoperating credit loss on BRW Term Loan and related guarantee |  |  |  |  | 697,000,000 |
Routes |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Impairment of intangible assets |  | 0 |  |  | 130,000,000 |
Fair value of indefinite-lived intangible assets |  | 1,100,000,000 |  |  | $ 1,100,000,000 |
Aircraft Engines |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Impairment for aircraft engines removed from operations |  |  |  |  |  | $ 47,000,000
Embedded Aircraft Lease |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Impairment of right-of-use asset |  | $ 38,000,000 |  |  |  |

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