| Document and Entity Information | Feb. 22, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Feb. 22, 2021 |
| Entity File Number | 001-35121 |
| Entity Registrant Name | AIR LEASE CORPORATION |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 27-1840403 |
| Entity Address, Address Line One | 2000 Avenue of the Stars |
| Entity Address, Adress Line Two | Suite 1000N |
| Entity Address, City or Town | Los Angeles |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 90067 |
| City Area Code | 310 |
| Local Phone Number | 553-0555 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001487712 |
| Amendment Flag | false |
| Common Class A [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Class A Common Stock |
| Trading Symbol | AL |
| Security Exchange Name | NYSE |
| Series A Preferred Stock [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 6.150% Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series A |
| Trading Symbol | AL PRA |
| Security Exchange Name | NYSE |
