v3.26.1
Fair Value Measurements - Schedule of Fair Value of Debt (Details) - USD ($)
$ in Millions
May 14, 2026
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Carrying Value   $ 3,248.1 $ 3,283.3
Delek Logistics 2029 Notes | Senior Notes      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Carrying Value   650.0 1,050.0
Repayments of long-term debt $ 400.0    
Delek Logistics 2029 Notes | Senior Notes | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value   676.6 1,100.4
Delek Logistics 2033 Notes | Senior Notes      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Carrying Value   700.0 700.0
Delek Logistics 2033 Notes | Senior Notes | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value   714.4 716.4
Delek Logistics 2034 Notes | Senior Notes      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Carrying Value   800.0 $ 0.0
Delek Logistics 2034 Notes | Senior Notes | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value   $ 797.3