Debt (Narrative) (Details)						3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	May 09, 2024 USD ($)	Feb. 17, 2023 USD ($) extension	Jan. 26, 2023 USD ($)	Jan. 25, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	May 17, 2022
Debt Instrument [Line Items]
Repayment of Alkali senior secured notes (Note 10)								$ 5,815,000	$ 0
Restricted cash	$ 18,804,000					$ 18,804,000		18,804,000		$ 18,804,000
Repayment of senior unsecured notes								339,310,000	341,135,000
Proceeds from issuance of debt					$ 491,000,000
Loss on extinguishment of debt						(1,429,000)	$ (3,000)	1,429,000	$ 1,812,000
SENIOR UNSECURED NOTES, net of debt issuance costs, discount and premium	$ 3,500,000,000					$ 3,500,000,000		$ 3,500,000,000		3,100,000,000
Senior Secured Credit Facility | Credit Facility
Debt Instrument [Line Items]
Credit facility extension period			1 year
Credit facility, number of extensions | extension			2
5.875% Alkali senior secured notes due 2042(2) | Senior Notes
Debt Instrument [Line Items]
Interest rate	5.875%					5.875%		5.875%
Repayment of Alkali senior secured notes (Note 10)						$ 2,800,000		$ 5,800,000
Year five	$ 71,900,000					71,900,000		71,900,000
Accrued Liabilities	12,300,000					12,300,000		12,300,000		11,600,000
Restricted cash	$ 18,800,000					$ 18,800,000		$ 18,800,000
Proceeds from issuance of debt, net		$ 688,000,000
Interest rate, limited term percentage											10
Senior Notes | 2032 Notes
Debt Instrument [Line Items]
Interest rate	7.875%	7.875%				7.875%		7.875%
Face amount		$ 700,000,000
Senior Notes | 2030 Notes
Debt Instrument [Line Items]
Interest rate	8.875%				8.875%	8.875%		8.875%
Face amount					$ 500,000,000
Senior Notes | 5.625% senior unsecured notes due 2024
Debt Instrument [Line Items]
Interest rate					5.625%
Repayments of long term debt				$ 24,800,000	$ 316,300,000
Loss on extinguishment of debt					$ 1,800,000
6.250% senior unsecured notes due 2026 | Senior Notes
Debt Instrument [Line Items]
Interest rate	6.25%					6.25%		6.25%
Repayment of senior unsecured notes		339,300,000
Issuance cost, writeoff		$ 1,400,000
Revolving Credit Facility | Revolving Loan | Credit Facility
Debt Instrument [Line Items]
Line of credit, unused capacity commitment fee percentage	0.50%
Credit facility, additional borrowing capacity	$ 200,000,000					$ 200,000,000		$ 200,000,000
Credit facility, amount borrowed	134,800,000					134,800,000		134,800,000
Letters of credit, outstanding amount	4,500,000					4,500,000		4,500,000
Remaining borrowing capacity	710,700,000					710,700,000		710,700,000
Unamortized debt issuance costs	4,300,000					4,300,000		4,300,000		$ 5,700,000
Maximum borrowing capacity			$ 850,000,000
Revolving Credit Facility | Revolving Loan | Credit Facility | Petroleum Products
Debt Instrument [Line Items]
Credit facility, amount borrowed	$ 17,200,000					17,200,000		$ 17,200,000
Revolving Credit Facility | Revolving Loan | Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	3.00%
Revolving Credit Facility | Revolving Loan | Credit Facility | Alternate Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.00%
Revolving Credit Facility | Revolving Loan | Credit Facility | Federal Funds Effective Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate								0.50%
Revolving Credit Facility | Senior Secured Credit Facility | Credit Facility
Debt Instrument [Line Items]
Letter of credit, fee percentage	3.00%
Minimum | Revolving Credit Facility | Revolving Loan | Credit Facility
Debt Instrument [Line Items]
Line of credit, unused capacity commitment fee percentage								0.30%
Minimum | Revolving Credit Facility | Revolving Loan | Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate								2.25%
Minimum | Revolving Credit Facility | Revolving Loan | Credit Facility | Alternate Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate								1.25%
Minimum | Revolving Credit Facility | Senior Secured Credit Facility | Credit Facility
Debt Instrument [Line Items]
Letter of credit, fee percentage								2.25%
Maximum | Revolving Credit Facility | Revolving Loan | Credit Facility
Debt Instrument [Line Items]
Line of credit, unused capacity commitment fee percentage								0.50%
Letters of credit, outstanding amount	$ 100,000,000					$ 100,000,000		$ 100,000,000
Maximum | Revolving Credit Facility | Revolving Loan | Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate								3.50%
Maximum | Revolving Credit Facility | Revolving Loan | Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | One-month Tenor
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate								1.00%
Maximum | Revolving Credit Facility | Revolving Loan | Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Term SOFR Adjustment
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate								0.10%
Maximum | Revolving Credit Facility | Revolving Loan | Credit Facility | Alternate Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate								2.50%
Maximum | Revolving Credit Facility | Senior Secured Credit Facility | Credit Facility
Debt Instrument [Line Items]
Letter of credit, fee percentage								3.50%
Guarantor Subsidiary | Genesis Energy, LLC | Genesis Finance Corporation | Senior Notes
Obligation with Joint and Several Liability Arrangement [Line Items]
Percentage of equity interest								100.00%