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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, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Debt Disclosure [Abstract] |  |  |  |
Interest income | $ 3.0 | $ 0.8 | $ 7.0 | $ 4.6
Interest expense and other financing costs | (31.6) | (34.7) | (102.3) | (79.4)
Interest expense and other financing costs, net | $ (28.6) | $ (34.0) | $ (95.4) | $ (74.8)

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