| Document and Entity Information | Aug. 01, 2022 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001694426 |
| Document Type | 8-K |
| Document Period End Date | Aug. 01, 2022 |
| Entity Registrant Name | DELEK US HOLDINGS, INC. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-38142 |
| Entity Tax Identification Number | 35-2581557 |
| Entity Address, Address Line One | 7102 Commerce Way |
| Entity Address, City or Town | Brentwood |
| Entity Address, State or Province | TN |
| Entity Address, Postal Zip Code | 37027 |
| City Area Code | (615) |
| Local Phone Number | 771-6701 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.01 par value |
| Trading Symbol | DK |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
