Investments in Affiliated Companies (Operating Results, Affiliates) (Details 4) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Revenues	$ 1,410.9	$ 1,273.0	$ 1,257.4
Net Income	259.2	155.9	143.1
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	487.2	417.7	407.4
Gains on sales of assets	91.7	22.9	79.5
Net Income	$ 150.6	$ 73.9	$ 5.0