Description of Business and Summary of Significant Accounting Policies (Details) $ in Millions		3 Months Ended	12 Months Ended
	Jan. 01, 2020 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) Petroleum_Refineries mi	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Nov. 12, 2018
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Number of refineries located in Tulsa, Oklahoma | Petroleum_Refineries			2
Refinery distance from main city (miles) | mi			65
Impairment of long-lived assets		$ 232.2
Decommissioning expense			$ 24.7
Severance costs		$ 3.7	3.8
Allowance for doubtful accounts			3.4	$ 4.5
Asset retirement obligation			42.6	35.9
Equity in joint ventures			93.2
Investment in joint venture			120.5
Deferred turnaround and amortization expense			158.4	141.9	$ 110.9
Proceeds from inventory repurchase agreements			44.9	52.1	51.2
Payments under inventory repurchase agreements			46.4	$ 49.2	$ 52.5
Increase (decrease) in reserve for doubtful accounts	$ 3.2		2.1
Business Combination Acquiree Sonneborn
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Equity method investment, ownership percentage						100.00%
Corporate Segment
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Restructuring and related costs recorded to segments			12.7
Refining
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Restructuring and related costs recorded to segments			24.8
Inventories
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Reserve against repair and maintenance inventory			$ 9.0
Transportation vehicles
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Estimated useful life of assets			5 years
Cheyenne
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Equity method investment, ownership percentage			50.00%
Osage Pipeline
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Equity method investment, ownership percentage			50.00%
HEP
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Percentage of ownership in variable interest entity			57.00%
Minimum
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Frequency of maintenance (in years)			2 years
Minimum | Refining Pipeline And Terminal Facilities
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Estimated useful life of assets			15 years
Minimum | Buildings and Improvements
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Estimated useful life of assets			10 years
Minimum | Other fixed assets
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Estimated useful life of assets			5 years
Maximum
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Frequency of maintenance (in years)			5 years
Maximum | Refining Pipeline And Terminal Facilities
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Estimated useful life of assets			32 years
Maximum | Buildings and Improvements
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Estimated useful life of assets			40 years
Maximum | Other fixed assets
Schedule of Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Line Items]
Estimated useful life of assets			30 years