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Debt - Carrying Amounts of Long-Term Debt (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Jan. 23, 2025
Dec. 31, 2024
Debt Instrument [Line Items]      
Total debt at face value $ 2,704   $ 2,650
Unamortized discount and debt issuance costs (27)   (12)
Total debt 2,677   2,638
Current debt 0   (350)
Long-term debt 2,677   2,288
Level 2      
Debt Instrument [Line Items]      
HF Sinclair, HollyFrontier and HEP Senior Notes 2,725   2,284
Senior Notes      
Debt Instrument [Line Items]      
Total debt at face value 2,704   2,300
Senior Notes | HEP      
Debt Instrument [Line Items]      
Total debt at face value 1   1
Senior Notes | HF Sinclair Senior Notes:      
Debt Instrument [Line Items]      
Total debt at face value $ 2,628   2,021
Senior Notes | 5.875% Senior Notes      
Debt Instrument [Line Items]      
Stated interest rate 5.875%    
Total debt at face value $ 154   797
Senior Notes | 6.375% Senior Notes      
Debt Instrument [Line Items]      
Stated interest rate 6.375%    
Total debt at face value $ 250   400
Senior Notes | 5.000% Senior Notes      
Debt Instrument [Line Items]      
Stated interest rate 5.00%    
Total debt at face value $ 499   499
Senior Notes | 4.500% Senior Notes      
Debt Instrument [Line Items]      
Stated interest rate 4.50%    
Total debt at face value $ 325   325
Senior Notes | 5.750% Senior Notes      
Debt Instrument [Line Items]      
Stated interest rate 5.75% 5.75%  
Total debt at face value $ 650   0
Senior Notes | 6.250% Senior Notes      
Debt Instrument [Line Items]      
Stated interest rate 6.25% 6.25%  
Total debt at face value $ 750   0
Senior Notes | HollyFrontier Senior Notes:      
Debt Instrument [Line Items]      
Total debt at face value $ 75   278
Senior Notes | 5.875% Senior Notes      
Debt Instrument [Line Items]      
Stated interest rate 5.875%    
Total debt at face value $ 0   203
Senior Notes | 4.500% Senior Notes      
Debt Instrument [Line Items]      
Stated interest rate 4.50%    
Total debt at face value $ 75   75
Senior Notes | HEP 6.375% Senior Notes | HEP      
Debt Instrument [Line Items]      
Stated interest rate 6.375%    
Total debt at face value $ 0   0
Senior Notes | HEP 5.000% Senior Notes | HEP      
Debt Instrument [Line Items]      
Stated interest rate 5.00%    
Total debt at face value $ 1   1
Line of Credit      
Debt Instrument [Line Items]      
Total debt at face value 0   350
Line of Credit | Terminated HEP Credit Agreement | HEP      
Debt Instrument [Line Items]      
Total debt at face value 0   350
Line of Credit | Terminated HF Sinclair Credit Agreement      
Debt Instrument [Line Items]      
Total debt at face value 0   0
Line of Credit | HF Sinclair Credit Agreement      
Debt Instrument [Line Items]      
Total debt at face value $ 0   $ 0