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Commitments and contingencies (Narrative) (Details) | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Oct. 31, 2013 USD ($) | Jul. 31, 2011 USD ($) claim | Dec. 31, 2020 USD ($) aircraft | Dec. 31, 2017 USD ($) | Dec. 31, 2008 USD ($) | Dec. 31, 2006 USD ($) | Dec. 31, 1992 aircraft engine | Jan. 01, 1990 aircraft engine
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Non-refundable deposits |  |  | $ 1,800,000,000 |  |  |  |  |
VASP Litigation |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Damages suffered |  |  |  | $ 0 |  |  |  |
VASP Litigation | VASP Litigation English Court |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Damages awarded |  |  |  |  |  | $ 40,000,000 |  |
Claim award for loss of profit plus accrued interest |  |  |  |  | $ 40,000,000 |  |  |
VASP Litigation | VASP Litigation Irish Court |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Damages awarded |  |  |  |  |  | $ 36,900,000 |  |
Claim award for loss of profit plus accrued interest |  |  |  |  | $ 24,000,000 |  |  |
VASP Litigation | Aircraft |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of capital leased assets | aircraft |  |  |  |  |  |  | 13 |
Number of leases that company incurred obligations due to another company's default | aircraft |  |  |  |  |  |  | 13 |
VASP Litigation | Engines |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of capital leased assets | engine |  |  |  |  |  |  | 3 |
Number of leases that company incurred obligations due to another company's default | engine |  |  |  |  |  |  | 3 |
Transbrasil Litigation |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Damages suffered | $ 0 |  |  |  |  |  |  |
Number of actions | claim |  | 3 |  |  |  |  |  |
Aggregate amount due from AerCap |  | $ 210,000,000 |  |  |  |  |  |
Transbrasil Litigation | Statutory Penalties |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of actions | claim |  | 1 |  |  |  |  |  |
Transbrasil Litigation | Recovery of Attorneys' Fees |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of actions | claim |  | 1 |  |  |  |  |  |
Transbrasil Litigation | Indemnity Claim |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of actions | claim |  | 1 |  |  |  |  |  |
Transbrasil Litigation | Aircraft |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of capital leased assets | aircraft |  |  |  |  |  |  |  | 1
Transbrasil Litigation | Engines |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of capital leased assets | engine |  |  |  |  |  |  |  | 2
Capital Addition Purchase Commitments |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of forward orders | aircraft |  |  | 286 |  |  |  |  |

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