| Cover | Jul. 14, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jul. 14, 2021 |
| Entity File Number | 001-05424 |
| Entity Registrant Name | DELTA AIR LINES, INC. |
| Entity Central Index Key | 0000027904 |
| Entity Tax Identification Number | 58-0218548 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | P.O. Box 20706 |
| Entity Address, City or Town | Atlanta |
| Entity Address, State or Province | GA |
| Entity Address, Postal Zip Code | 30320-6001 |
| City Area Code | (404) |
| Local Phone Number | 715-2600 |
| 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 $0.0001 per share |
| Trading Symbol | DAL |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
