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Debt (AerFunding Revolving Credit Facility, AerTurbine Revolving Credit Agreement and Other Secured Debt Narrative) (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 USD ($) item | Dec. 31, 2014 USD ($) | Apr. 30, 2006 USD ($)
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 29,806,843,000 | $ 30,402,392,000 |
Collateral (Number of aircraft) | item |  | 617 |  |
AerFunding Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Credit facility, current borrowing capacity |  | $ 2,160,000,000 |  | $ 1,000,000,000
Debt Instrument, Collateral Amount |  | $ 1,400,000,000 |  |
Required cash reserve as a percentage of outstanding borrowings |  | 5.00% |  |
AeroTurbine Revolving Credit Agreement [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Credit facility, current borrowing capacity |  | $ 550,000,000 |  |
Spread over reference rate |  | 2.50% |  |
SkyFunding I Facility Floating Rate Tranche [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral (Number of aircraft) | item |  | 6 |  |
Floating rate tranches |  | $ 143,758,000 |  |
Spread over reference rate |  | 2.85% |  |
Debt, Maturity |  | 2021-2022 |  |
SkyFunding I Facility Fixed Rate Tranche [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral (Number of aircraft) | item |  | 6 |  |
Fixed rate tranches |  | $ 142,650,000 |  |
Stated interest rate |  | 4.43% |  |
Debt, Maturity |  | 2021-2022 |  |
SkyFunding II Facility Floating Rate Tranche [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral (Number of aircraft) | item |  | 6 |  |
Floating rate tranches |  | $ 156,285,000 |  |
Spread over reference rate |  | 3.15% |  |
Debt, Maturity |  | 2022-2023 |  |
SkyFunding II Facility Fixed Rate Tranche [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral (Number of aircraft) | item |  | 3 |  |
Fixed rate tranches |  | $ 74,490,000 |  |
Stated interest rate |  | 4.43% |  |
Debt, Maturity |  | 2022-2023 |  |
Camden Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral (Number of aircraft) | item |  | 7 |  |
Fixed rate tranches |  | $ 135,978,000 |  |
Stated interest rate |  | 4.74% |  |
Debt, Maturity |  | 2018 |  |
AerCap Partners I Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral (Number of aircraft) | item |  | 11 |  |
Floating rate tranches |  | $ 126,956,000 |  |
Spread over reference rate |  | 1.65% |  |
Debt, Maturity |  | 2018 |  |
StratusFunding Facility Floating Rate Tranche [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral (Number of aircraft) | item |  | 2 |  |
Floating rate tranches |  | $ 166,514,000 |  |
Spread over reference rate |  | 1.95% |  |
Debt, Maturity |  | 2026 |  |
StratusFunding Facility Fixed Rate Tranche [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral (Number of aircraft) | item |  | 2 |  |
Fixed rate tranches |  | $ 166,331,000 |  |
Stated interest rate |  | 3.93% |  |
Debt, Maturity |  | 2026 |  |
CieloFunding Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral (Number of aircraft) | item |  | 3 |  |
Fixed rate tranches |  | $ 126,038,000 |  |
Stated interest rate |  | 3.48% |  |
Debt, Maturity |  | 2020 |  |
CieloFunding II Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral (Number of aircraft) | item |  | 2 |  |
Fixed rate tranches |  | $ 71,655,000 |  |
Stated interest rate |  | 2.80% |  |
Debt, Maturity |  | 2020 |  |
CloudFunding Facilities [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral (Number of aircraft) | item |  | 16 |  |
Fixed rate tranches |  | $ 270,118,000 |  |
Stated interest rate |  | 3.95% |  |
Debt, Maturity |  | 2022-2026 |  |
LimelightFunding Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral (Number of aircraft) | item |  | 2 |  |
Fixed rate tranches |  | $ 168,646,000 |  |
Stated interest rate |  | 4.70% |  |
Debt, Maturity |  | 2026 |  |
Secured Commercial Bank Financings Fixed Rate Tranche [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral (Number of aircraft) | item |  | 8 |  |
Fixed rate tranches |  | $ 175,789,000 |  |
Stated interest rate |  | 3.71% |  |
Debt, Maturity |  | 2016-2021 |  |
Secured Commercial Bank Financings Floating Rate Tranche [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Collateral (Number of aircraft) | item | [1] | 32 |  |
Floating rate tranches |  | $ 820,215,000 |  |
Spread over reference rate |  | 2.30% |  |
Debt, Maturity |  | 2017-2025 |  |
Number of engines | item |  | 4 |  |
Other Secured Debt [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Credit facility amount outstanding |  | $ 2,745,423,000 |  |
Collateral (Number of aircraft) | item |  | 106 |  |
Minimum [Member] | AerFunding Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Aircraft purchases, maximum percentage financed |  | 73.50% |  |
Unused loan commitment fee, percentage |  | 0.375% |  |
Maximum [Member] | AerFunding Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Aircraft purchases, maximum percentage financed |  | 80.00% |  |
Unused loan commitment fee, percentage |  | 0.50% |  |
Charitable Trust [Member] | AerFunding Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Ownership percentage |  | 95.00% |  |
AerCap Ireland [Member] | AerFunding Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Ownership percentage |  | 5.00% |  |
Revolving Period [Member] | AerFunding Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Credit facility, term |  | 3 years |  |
Term Loan [Member] | AerFunding Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Credit facility, term |  | 2 years |  |
Borrowing Period [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Spread over reference rate | [2] | 2.25% |  |
Debt Instrument, Maturity Date |  | Dec. 01, 2017 |  |
Period from December 10, 2017 to December 9, 2018 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Spread over reference rate |  | 3.25% |  |
Period from December 10, 2018 to December 9, 2019 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Spread over reference rate |  | 3.75% |  |
Secured Debt [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 12,623,288,000 | 13,355,360,000 |
Secured Debt [Member] | AerFunding Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt |  | $ 1,058,294,000 | 887,385,000 |
Collateral (Number of aircraft) | item |  | 32 |  |
Debt, Maturity |  | 2019 |  |
Secured Debt [Member] | AeroTurbine Revolving Credit Agreement [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt | [3] | $ 321,603,000 | $ 302,142,000 |
Debt, Maturity | [3] | 2019 |  |
[1] | Four engines are pledged as collateral in addition to the aircraft.
[2] | The borrowing period is until December 9, 2017, after which the loan converts to a term loan.
[3] | AeroTurbine's assets serve as collateral for the AeroTurbine revolving credit agreement.

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