Investments in Unconsolidated Affiliates (Schedule of Equity (Earnings) Losses from Unconsolidated Affiliates) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Schedule of Equity Method Investments [Line Items]
Equity (earnings) from unconsolidated affiliates, net	$ (25.2)	$ (23.4)	$ (78.7)	$ (69.1)
WAVE [Member]
Schedule of Equity Method Investments [Line Items]
Equity (earnings) from unconsolidated affiliates, net	(25.5)	(23.4)	(79.4)	(69.1)
Overcast [Member]
Schedule of Equity Method Investments [Line Items]
Equity (earnings) from unconsolidated affiliates, net	$ 0.3	$ 0.0	$ 0.7	$ 0.0

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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