Fair Value - Change in Fair Value for the Equity Investment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Equity Method Investments
Balance at beginning of period			$ 535.0
Change in fair value	$ 66.0	$ 0.0	64.8	$ 0.0
Balance at end of period	591.3		591.3
Indicor
Equity Method Investments
Balance at beginning of period	535.0		535.0
Change in fair value	56.3		56.3
Balance at end of period	$ 591.3		$ 591.3