Derivatives - Interest Rate Swaps (Details) - USD ($) $ in Millions	3 Months Ended							6 Months Ended
	Jun. 30, 2023		Mar. 31, 2023		Jun. 30, 2022		Mar. 31, 2022	Jun. 30, 2023		Jun. 30, 2022		Dec. 31, 2022
Derivatives
Tax expense	$ (1.8)		$ 0.4					$ (1.4)
Unrealized gain on designated cash flow hedge	5.7	[1],[2]	$ (1.2)	[3]	$ 0.0	[1]	$ 0.1	4.5	[1]	$ 0.1	[1]
Fair value of derivative assets—current	83.8							83.8				$ 68.4
Fair value of derivative assets	18.3							18.3				2.9
Interest expense, net of interest income	(1.1)				0.0			(1.6)		0.1
Interest rate swaps
Derivatives
Change in fair value of interest rate swaps	7.5				0.0			5.9		0.1
Tax expense	(1.8)				0.0			(1.4)		0.0
Unrealized gain on designated cash flow hedge	5.7				0.0			4.5		0.1
Fair value of derivative assets—current	5.5							5.5				0.0
Fair value of derivative assets	0.4				$ 0.0			0.4		$ 0.0
Net fair value of commodity derivatives	$ 5.9							$ 5.9				$ 0.0

[1] Includes tax expense of $1.8 million and $1.4 million for the three and six months ended June 30, 2023, respectively.

[2] Includes tax expense of $1.8 million for the three months ended June 30, 2023.

[3] Includes tax benefit of $0.4 million for the three months ended March 31, 2023.