Investment in Unconsolidated Affiliates Summarized Income Statement of Equity Method Investment (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Schedule of Equity Method Investments [Line Items]
Operating revenues	$ 1,270.8			$ 864.4			$ 2,663.8	$ 3,072.4
Operating Income (Loss)	317.9			284.8			557.6	462.9
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 262.8	$ 73.1	$ 279.5	252.5	$ 112.9	$ 52.7	$ 615.4	418.1
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				$ 107.0				$ 341.0