Investments in Unconsolidated Affiliates (Summary of Investment in Joint Venture, Balance Sheet Data) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Current assets	$ 348.9	$ 313.0
Current liabilities	249.7	194.5
Non-current liabilities	835.9	886.1
WAVE [Member] | Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Schedule of Equity Method Investments [Line Items]
Current assets	111.5	88.9
Non-current assets	98.9	87.2
Current liabilities	33.6	33.0
Non-current liabilities	$ 376.6	$ 363.9