| Cover | Feb. 18, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 18, 2021 |
| Entity File Number | 001-16545 |
| Entity Registrant Name | Atlas Air Worldwide Holdings, Inc. |
| Entity Central Index Key | 0001135185 |
| Entity Tax Identification Number | 13-4146982 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 2000 Westchester Avenue |
| Entity Address, City or Town | Purchase |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10577 |
| City Area Code | 914 |
| Local Phone Number | 701-8000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.01 per share |
| Trading Symbol | AAWW |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
