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, 2026	Mar. 31, 2025
Debt Disclosure [Abstract]
Interest income	$ 1.3	$ 3.7
Interest expense and other financing costs	(27.6)	(26.6)
Interest expense and other financing costs, net	$ (26.3)	$ (22.9)

Amount of interest expense classified as operating and nonoperating. Includes, but is not limited to, cost of borrowing accounted for as interest expense.

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+ Details