Fair Value Measurements - Changes in Fair Value of Level 3 (Details) - CALUMET SPECIALTY PRODUCTS PARTNERS, L.P. - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Summary of net changes in fair value of the company's level 3 financial assets and liabilities
Realized loss on derivative instruments	$ 11.3	$ 14.3	$ (5.6)	$ 39.8
Unrealized gain (loss) on derivative instruments	3.0	14.1	38.7	55.1
Level 3
Summary of net changes in fair value of the company's level 3 financial assets and liabilities
Fair value at January 1,			(40.8)	(73.8)
Realized loss on derivative instruments			(44.3)	(15.3)
Unrealized gain (loss) on derivative instruments			38.7	55.1
Settlements			44.3	15.3
Fair value at June 30,	$ (2.1)	$ (18.7)	$ (2.1)	$ (18.7)