Investments in Unconsolidated Affiliates (Schedule of Equity (Earnings) Losses from Unconsolidated Affiliates) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Schedule of Equity Method Investments [Line Items]
Equity earnings from unconsolidated affiliates	$ (26.3)	$ (24.9)	$ (53.5)	$ (45.7)
WAVE [Member]
Schedule of Equity Method Investments [Line Items]
Equity earnings from unconsolidated affiliates	(26.5)	(24.9)	(53.9)	(45.7)
Overcast [Member]
Schedule of Equity Method Investments [Line Items]
Equity earnings from unconsolidated affiliates	$ 0.2	$ 0.0	$ 0.4	$ 0.0