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Debt, Interest Income, Expense, and Other Finance Costs - Interest Income (Expense), and Other Financing Costs, net (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Debt Disclosure [Abstract]        
Interest income $ 5.0 $ 3.0 $ 8.6 $ 7.0
Interest expense and other financing costs (29.0) (31.6) (89.0) (102.3)
Interest Income (Expense), Nonoperating, Net $ (24.0) $ (28.6) $ (80.4) $ (95.4)