Debt, Interest Income, Expense, and Other Finance Costs - Interest Income (Expense), and Other Financing Costs, net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Disclosure [Abstract]
Interest income	$ 1.3	$ 1.4	$ 3.8	$ 3.7
Interest expense and other financing costs	(27.8)	(11.4)	(44.6)	(22.5)
Interest expense and other financing costs, net	$ (26.5)	$ (10.0)	$ (40.9)	$ (18.7)