v3.25.4

Debt - Narrative (Details) $ in Thousands |  | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 12, 2026 USD ($) | Dec. 31, 2025 USD ($) | Jul. 31, 2025 USD ($) | Jun. 30, 2025 USD ($) | Apr. 30, 2025 USD ($) interestPaymentPeriod | Jul. 31, 2024 USD ($) interestPaymentPeriod | Dec. 31, 2005 USD ($) tranche | Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Jan. 31, 2026 USD ($) | Oct. 31, 2025 USD ($) | Apr. 01, 2025 USD ($) | Mar. 31, 2025 USD ($) | Jan. 31, 2025 USD ($) | Mar. 31, 2018 USD ($) | Jun. 30, 2015 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding indebtedness, excluding fair value adjustments, debt issuance costs and debt discounts |  | $ 43,806,262 |  |  |  |  |  | $ 43,806,262 |  |  |  |  |  |  |  |  |
Debt instrument, unamortized discount (premium) and debt issuance costs, net |  | 240,983 |  |  |  |  |  | 240,983 | $ 242,984 |  |  |  |  |  |  |  |
Undrawn amounts |  | 11,001,391 |  |  |  |  |  | 11,001,391 |  |  |  |  |  |  |  |  |
Amortization of debt issuance costs, debt discount, debt premium and lease premium |  |  |  |  |  |  |  | 60,000 | 63,000 | $ 75,000 |  |  |  |  |  |  |
Debt |  | 43,565,321 |  |  |  |  |  | $ 43,565,321 | $ 45,294,511 |  |  |  |  |  |  |  |
AerFunding | Charitable Trust |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  |  |  | 95.00% |  |  |  |  |  |  |  |  |
AerFunding | AerCap Ireland |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  |
Unsecured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Undrawn amounts |  | 9,925,000 |  |  |  |  |  | $ 9,925,000 |  |  |  |  |  |  |  |  |
Unsecured | Revolving credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 950,000 |
Unsecured | Citi revolving credit facility II |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility maximum borrowing capacity |  | 4,350,000 |  |  |  |  |  | 4,350,000 |  |  |  |  |  |  |  |  |
Unsecured | Citi revolving credit facility I |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility maximum borrowing capacity |  | 4,650,000 |  |  |  |  |  | 4,650,000 |  |  |  |  |  |  |  |  |
Secured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Undrawn amounts |  | 1,076,391 |  |  |  |  |  | 1,076,391 |  |  |  |  |  |  |  |  |
Subordinated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Undrawn amounts |  | 0 |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |
AerCap Trust & AICDC Notes | Unsecured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Undrawn amounts |  | 0 |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  |  |
Redemption price of debt instrument, percentage |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |
4875% Senior Unsecured Debt Due 2028 | Unsecured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate (in percentage) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.875% |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 750,000 |  |
5.375% Senior Unsecured Debt Due 2031 | Unsecured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate (in percentage) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.375% |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 750,000 |  |
4.375% Senior Unsecured Debt Due 2030 | Unsecured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate (in percentage) |  |  |  |  |  |  |  |  |  |  |  | 4.375% |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  | $ 600,000 |  |  |  |  |
5.000% Senior Unsecured Debt Due 2035 | Unsecured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate (in percentage) |  |  |  |  |  |  |  |  |  |  |  | 5.00% |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  | $ 600,000 |  |  |  |  |
4.125% Senior Unsecured Debt Due 2029 | Unsecured | Subsequent event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate (in percentage) |  |  |  |  |  |  |  |  |  |  | 4.125% |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  | $ 900,000 |  |  |  |  |  |
4.750% Senior Unsecured Debt Due 2033 | Unsecured | Subsequent event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate (in percentage) |  |  |  |  |  |  |  |  |  |  | 4.75% |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  | $ 850,000 |  |  |  |  |  |
Unsecured Term Loan | Line of Credit | Unsecured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,500,000 | $ 545,000 |  |  |
Debt instrument, prepayment amount |  |  |  |  | $ 850,000 |  |  |  |  |  |  |  |  |  |  |  |
Export credit facilities | Secured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Undrawn amounts |  | 0 |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  |  |
Setanta | Secured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of secured debt |  |  | $ 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hyperion | Secured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of secured debt |  |  | $ 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
AerFunding Revolving Credit Facility | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decrease in line of credit facility, maximum borrowing capacity |  | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, term out period |  | 24 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AerFunding Revolving Credit Facility | Secured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Undrawn amounts |  | $ 947,164 |  |  |  |  |  | $ 947,164 |  |  |  |  |  |  |  |  |
ECAPS Subordinated Notes | Subordinated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  |
Number of tranches | tranche |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |
ECAPS Subordinated Notes | Subordinated | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, floating reference rate, duration |  |  |  |  |  |  | 3 months |  |  |  |  |  |  |  |  |  |
ECAPS Subordinated Notes | Subordinated | Ten Year Constant Maturity U.S. Treasury |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, floating reference rate, duration |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |
ECAPS Subordinated Notes | Subordinated | Thirty Year Constant Maturity U.S. Treasury |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, floating reference rate, duration |  |  |  |  |  |  | 30 years |  |  |  |  |  |  |  |  |  |
ECAPS Subordinated Debt $400 Million Tranche | Subordinated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  | $ 400,000 |  |  |  |  |  |  |  |  |  |
Spread over reference rate |  |  |  |  |  |  | 1.80% |  |  |  |  |  |  |  |  |  |
ECAPS Subordinated Debt $600 Million Tranche | Subordinated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  | $ 600,000 |  |  |  |  |  |  |  |  |  |
Spread over reference rate |  |  |  |  |  |  | 1.55% |  |  |  |  |  |  |  |  |  |
2045 Junior Subordinated Notes | Subordinated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000
Debt, fixed interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.50%
Percentage of principal amount redeemed |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed-rate Reset Junior Subordinated Notes Due 2055 | Subordinated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate (in percentage) |  |  |  |  |  | 6.95% |  |  |  |  |  |  |  |  |  |  |
Redemption price of debt instrument, percentage |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  | $ 750,000 |  |  |  |  |  |  |  |  |  |  |
Spread over reference rate |  |  |  |  |  | 2.72% |  |  |  |  |  |  |  |  |  |  |
Debt, reset period, duration |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |
Debt instrument, consecutive semi-annual interest payment | interestPaymentPeriod |  |  |  |  |  | 20 |  |  |  |  |  |  |  |  |  |  |
Fixed-rate Reset Junior Subordinated Notes Due 2056 | Subordinated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate (in percentage) |  |  |  |  | 6.50% |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |
Spread over reference rate |  |  |  |  | 2.441% |  |  |  |  |  |  |  |  |  |  |  |
Debt, reset period, duration |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, consecutive semi-annual interest payment | interestPaymentPeriod |  |  |  |  | 20 |  |  |  |  |  |  |  |  |  |  |  |
4.450% Senior Unsecured Debt Due 2026 | Unsecured | Subsequent event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate (in percentage) | 4.45% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum | AerCap Trust & AICDC Notes | Unsecured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate (in percentage) |  | 1.75% |  |  |  |  |  | 1.75% |  |  |  |  |  |  |  |  |
Minimum | Export credit facilities | Secured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument term |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |
Maximum | AerCap Trust & AICDC Notes | Unsecured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate (in percentage) |  | 6.45% |  |  |  |  |  | 6.45% |  |  |  |  |  |  |  |  |
Maximum | Export credit facilities | Secured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument term |  |  |  |  |  |  |  | 12 years |  |  |  |  |  |  |  |  |

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