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Investments in Unconsolidated Affiliates (Summary of the Difference Between Carrying Amount and Underlying Equity of Equity Method Investment) (Details) - WAVE [Member] - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
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Schedule of Equity Method Investments [Line Items] |  |
Total of fair value adjustments to assets | $ 119.3 | $ 123.6
Property, Plant and Equipment [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Total of fair value adjustments to assets | 0.4 | 0.4
Other Intangibles [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Total of fair value adjustments to assets | 88.5 | 92.8
Goodwill [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Total of fair value adjustments to assets | $ 30.4 | $ 30.4

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