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Debt (Summary of indebtedness) (Details) $ in Thousands | Dec. 31, 2021 USD ($) | Dec. 31, 2021 | Dec. 31, 2021 aircraftAndEngines | Dec. 31, 2021 aircraft | Dec. 31, 2021 engine | Dec. 31, 2020 USD ($)
--- | --- | --- | --- | --- | --- | ---
Debt Disclosure [Abstract] |  |  |  |  |  |
Outstanding indebtedness, excluding fair value adjustments, debt issuance costs and debt discounts | $ 50,542,116 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit facility and other available secured debt, remaining borrowing capacity | 10,600,000 |  |  |  |  |
Collateral (number of aircraft and helicopters) | aircraftAndEngines |  |  | 368 |  |  |
Commitment | 61,158,378 |  |  |  |  |
Undrawn amounts | 10,616,262 |  |  |  |  |
Debt issuance costs, debt discounts and debt premium | (343,794) |  |  |  |  | $ (192,823)
Debt | 50,204,678 |  |  |  |  | 28,742,081
Unsecured |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Commitment | 46,109,476 |  |  |  |  |
Undrawn amounts | 9,034,000 |  |  |  |  |
Amount outstanding | 37,079,686 |  |  |  |  | 15,776,730
Unsecured | ILFC Legacy Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Commitment | 1,034,274 |  |  |  |  |
Undrawn amounts | 0 |  |  |  |  |
Amount outstanding | 1,034,274 |  |  |  |  | 1,198,888
Weighted average interest rate |  | 6.63% |  |  |  |
Unsecured | AerCap Trust & AICDC Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Commitment | 34,167,202 |  |  |  |  |
Undrawn amounts | 0 |  |  |  |  |
Amount outstanding | 34,167,202 |  |  |  |  | 12,797,126
Weighted average interest rate |  | 3.07% |  |  |  |
Unsecured | Asia and Citi revolving credit Facilities |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Commitment | 9,034,000 |  |  |  |  |
Undrawn amounts | 9,034,000 |  |  |  |  |
Amount outstanding | 0 |  |  |  |  | 0
Weighted average interest rate |  | 0.00% |  |  |  |
Unsecured | Other unsecured debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Commitment | 1,874,000 |  |  |  |  |
Undrawn amounts | 0 |  |  |  |  |
Amount outstanding | 1,874,000 |  |  |  |  | 1,759,000
Weighted average interest rate |  | 1.83% |  |  |  |
Unsecured | Unsecured debt, fair value adjustment |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Commitment | 0 |  |  |  |  |
Undrawn amounts | 0 |  |  |  |  |
Amount outstanding | 4,210 |  |  |  |  | 21,716
Secured |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Commitment | 12,771,683 |  |  |  |  |
Undrawn amounts | 1,582,262 |  |  |  |  |
Amount outstanding | 11,191,782 |  |  |  |  | 10,864,872
Secured | Export credit facilities |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Collateral (number of aircraft and helicopters) | aircraftAndEngines |  |  | 42 |  |  |
Commitment | 1,276,557 |  |  |  |  |
Undrawn amounts | 0 |  |  |  |  |
Amount outstanding | 1,276,557 |  |  |  |  | 1,023,912
Weighted average interest rate |  | 2.08% |  |  |  |
Additional commitment | 800,000 |  |  |  |  |
Secured | Institutional secured term loans & secured portfolio loans |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Collateral (number of aircraft and helicopters) | aircraftAndEngines |  |  | 277 |  |  |
Commitment | 8,428,534 |  |  |  |  |
Undrawn amounts | 0 |  |  |  |  |
Amount outstanding | 8,428,534 |  |  |  |  | 6,989,633
Weighted average interest rate |  | 2.50% |  |  |  |
Secured | AerFunding Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Collateral (number of aircraft and helicopters) | aircraftAndEngines |  |  | 26 |  |  |
Commitment | 2,075,000 |  |  |  |  |
Undrawn amounts | 1,291,512 |  |  |  |  |
Amount outstanding | 783,488 |  |  |  |  | 2,074,881
Weighted average interest rate |  | 2.85% |  |  |  |
Secured | Other secured debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Collateral (number of aircraft and helicopters) |  |  | 23 | 23 |  |
Commitment | 991,592 |  |  |  |  |
Undrawn amounts | 290,750 |  |  |  |  |
Amount outstanding | 700,842 |  |  |  |  | 778,273
Weighted average interest rate |  | 3.29% |  |  |  |
Number of engines pledged as collateral | engine |  |  |  |  | 74 |
Secured | Secured debt fair value adjustment |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Commitment | 0 |  |  |  |  |
Undrawn amounts | 0 |  |  |  |  |
Amount outstanding | 2,361 |  |  |  |  | (1,827)
Subordinated |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Commitment | 2,277,219 |  |  |  |  |
Undrawn amounts | 0 |  |  |  |  |
Amount outstanding | 2,277,004 |  |  |  |  | 2,293,302
Subordinated | Subordinated notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Commitment | 2,250,000 |  |  |  |  |
Undrawn amounts | 0 |  |  |  |  |
Amount outstanding | 2,250,000 |  |  |  |  | 2,250,000
Weighted average interest rate |  | 4.94% |  |  |  |
Subordinated | Subordinated debt issued by VIEs |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Commitment | 27,219 |  |  |  |  |
Undrawn amounts | 0 |  |  |  |  |
Amount outstanding | 27,219 |  |  |  |  | 43,521
Weighted average interest rate |  | 0.00% |  |  |  |
Subordinated | Subordinated debt fair value adjustment |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Commitment | 0 |  |  |  |  |
Undrawn amounts | 0 |  |  |  |  |
Amount outstanding | (215) |  |  |  |  | $ (219)
Floating Rate Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt | $ 9,500,000 |  |  |  |  |

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