Investment in Unconsolidated Affiliates Summarized Income Statement of Equity Method Investment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Schedule of Equity Method Investments [Line Items]
Operating revenues	$ 589.3	$ 1,630.6
Operating Income (Loss)	83.1	48.6
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 279.5	52.7
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Schedule of Equity Method Investments [Line Items]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		$ 155.0