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Debt - Schedule of Tender Offer (Details) - Senior Notes - USD ($) $ in Millions			1 Months Ended	8 Months Ended
	Aug. 18, 2025	Jan. 23, 2025	Sep. 30, 2025	Sep. 30, 2025
Debt Instrument [Line Items]
Aggregate Principal Amount Accepted	$ 201	$ 646
Purchase Price Including Premium	203	654
Interest Paid	5	13
HF Sinclair Senior Notes:
Debt Instrument [Line Items]
Aggregate Principal Amount Accepted		598
Purchase Price Including Premium		605
Interest Paid		12
5.875% Senior Notes
Debt Instrument [Line Items]
Stated interest rate			5.875%	5.875%
Aggregate Principal Amount Accepted	37	448
Purchase Price Including Premium	37	452	$ 117	$ 195
Interest Paid	1	9
6.375% Senior Notes
Debt Instrument [Line Items]
Stated interest rate			6.375%	6.375%
Aggregate Principal Amount Accepted	164	150
Purchase Price Including Premium	166	153
Interest Paid	$ 4	3
HollyFrontier Senior Notes:
Debt Instrument [Line Items]
Stated interest rate			5.875%	5.875%
Aggregate Principal Amount Accepted		48
Purchase Price Including Premium		49		$ 155
Interest Paid		$ 1

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