Debt, Interest Income, Expense, and Other Finance Costs - Interest Income (Expense), and Other Financing Costs, net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Disclosure [Abstract]
Interest income	$ 2.5	$ 2.3
Interest expense and other financing costs	(16.8)	(11.1)
Interest expense and other financing costs, net	$ (14.3)	$ (8.7)