Supplemental Cash Flow Information (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021
Cash:
Interest paid, net of capitalized interest	[1]	$ 332.6	$ 327.8
Income taxes (received) paid, net		1.1	1.2
Non-cash investing activities:
Transfers from materials and supplies inventory to property, plant and equipment			2.4
Non-cash financing activities:
Changes in accrued distributions to noncontrolling interests		(18.0)	(43.1)
Retained Earnings [Member]
Non-cash investing activities:
Impact of capital expenditure accruals on property, plant and equipment, net		$ (40.1)	$ (7.5)

[1] Interest capitalized on major projects was $9.5 million and $2.7 million for the nine months ended September 30, 2022 and 2021.