Revenues Performance Obligations (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Fixed Fee Revenues Recognized	$ 328.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	9 months	[1]
Estimated revenues from contracts with customers from unsatisfied performance obligations as of March 31, 2022	$ 850.0	[1]
Operating revenues which are fixed and determinable (operating leases)	18.0	[1]
Total projected operating revenues under committed firm agreements as of March 31, 2022	$ 868.0	[1]
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 March 31, 2022	$ 1,055.0
Operating revenues which are fixed and determinable (operating leases)	24.0
Total projected operating revenues under committed firm agreements as of March 31, 2022	$ 1,079.0
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 March 31, 2022	$ 6,744.0
Operating revenues which are fixed and determinable (operating leases)	177.5
Total projected operating revenues under committed firm agreements as of March 31, 2022	6,921.5
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 March 31, 2022	8,649.0
Operating revenues which are fixed and determinable (operating leases)	219.5
Total projected operating revenues under committed firm agreements as of March 31, 2022	$ 8,868.5

[1] The 2022 period is for the nine months ending December 31, 2022. For the three months ended March 31, 2022, the Company recognized $328.5 million of fixed fee revenues for the fulfillment of performance obligations.