Fair Value Measurements - Changes in Fair Value of Level 3 (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Summary of net changes in fair value of the company's level 3 financial assets and liabilities
Realized loss on derivative instruments	$ (7.2)	$ (16.9)
Unrealized gain on derivative instruments	0.1	35.7
Level 3
Summary of net changes in fair value of the company's level 3 financial assets and liabilities
Fair value at January 1,	6.3	(40.8)
Realized loss on derivative instruments	(7.3)	(52.6)
Unrealized gain on derivative instruments	0.1	35.7
Settlements	7.3	52.6
Fair value at March 31,	$ 6.4	$ (5.1)