Revenues Performance Obligations (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Estimated revenues from contracts with customers from unsatisfied performance obligations as of December 31, 2021	$ 1,115.0
Operating revenues which are fixed and determinable (operating leases)	25.0
Total projected operating revenues under committed firm agreements as of December 31, 2021	$ 1,140.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Estimated revenues from contracts with customers from unsatisfied performance obligations as of December 31, 2021	$ 1,015.0
Operating revenues which are fixed and determinable (operating leases)	25.0
Total projected operating revenues under committed firm agreements as of December 31, 2021	$ 1,040.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	20 years
Estimated revenues from contracts with customers from unsatisfied performance obligations as of December 31, 2021	$ 6,704.5
Operating revenues which are fixed and determinable (operating leases)	175.5
Total projected operating revenues under committed firm agreements as of December 31, 2021	6,880.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Estimated revenues from contracts with customers from unsatisfied performance obligations as of December 31, 2021	8,834.5
Operating revenues which are fixed and determinable (operating leases)	225.5
Total projected operating revenues under committed firm agreements as of December 31, 2021	$ 9,060.0