Commitments and Contingencies Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Lessee, Lease, Description [Line Items]
Total costs of products/services sold	$ 2,544.9	$ 3,129.4	$ 3,374.7
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	20.9
Operating Lease, Payments	22.9
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	4.2
Operations and maintenance	138.8	125.8	$ 136.0
Operating Lease, Expense	$ 28.3
Operating Lease, Weighted Average Remaining Lease Term	4 years 4 months 24 days
Operating lease right-of-use assets, net	$ 53.8
Accrued expenses and other liabilities	161.7	112.4
Operating leases	41.5	0.0
Operating Lease, Liability	59.6
Property, plant and equipment	3,612.5	2,598.1
Less: accumulated depreciation	703.4	568.4
Property, plant and equipment, net	2,909.1	2,029.7
Other long-term liabilities	301.6	$ 173.6
Finance Lease, Liability	$ 8.4
Finance Lease, Weighted Average Remaining Lease Term	2 years 7 months 6 days
Operating Lease, Weighted Average Discount Rate, Percent	5.90%
Finance Lease, Weighted Average Discount Rate, Percent	7.30%
Sublease Income	$ (1.0)
Operating Lease Expense, Net	27.3
Finance Lease, Right-of-Use Asset, Amortization	3.6
Finance Lease, Interest Expense	0.7
Finance Lease Expense	4.3
Short-term Lease, Cost	3.7
Finance Lease, Interest Payment on Liability	0.7
Payments on finance leases	3.5
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	1.8
Finance Lease, Liability, Payments, Due Next Twelve Months	3.6
Operating and Finance Lease Liability, Due Next Twelve Months	24.5
Lessee, Operating Lease, Liability, Payments, Due Year Two	16.3
Finance Lease, Liability, Payments, Due Year Two	3.6
Operating and Finance Lease Liability Payments, Due Year Two	19.9
Lessee, Operating Lease, Liability, Payments, Due Year Three	11.1
Finance Lease, Liability, Payments, Due Year Three	1.9
Operating and Finance Lease Liability Payments, Due Year Three	13.0
Lessee, Operating Lease, Liability, Payments, Due Year Four	6.7
Finance Lease, Liability, Payments, Due Year Four	0.1
Operating and Finance Lease Liability Payments, Due Year Four	6.8
Lessee, Operating Lease, Liability, Payments, Due Year Five	6.0
Finance Lease, Liability, Payments, Due Year Five	0.0
Operating and Finance Lease Liability Payments, Due Year Five	6.0
Lessee, Operating Lease, Liability, Payments, Due after Year Five	7.5
Finance Lease, Liability, Payments, Due after Year Five	0.0
Operating and Finance Lease Liability Payments, Due after Year Five	7.5
Lessee, Operating Lease, Liability, Payments, Due	68.5
Finance Lease, Liability, Payment, Due	9.2
Operating and Finance Lease Liability, Payments, Due	77.7
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	8.9
Finance Lease, Liability, Undiscounted Excess Amount	0.8
Operating and Finance Lease Liability, Undiscounted Excess Amount	9.7
Operating and Finance Lease Liability	68.0
Operating Leases [Member]
Lessee, Lease, Description [Line Items]
Total costs of products/services sold	17.5
Operations and maintenance	10.8
Operating lease right-of-use assets, net	53.8
Accrued expenses and other liabilities	18.1
Operating leases	41.5
Operating Lease, Liability	59.6
Finance Lease [Member]
Lessee, Lease, Description [Line Items]
Accrued expenses and other liabilities	3.2
Property, plant and equipment	14.9
Less: accumulated depreciation	5.4
Property, plant and equipment, net	9.5
Other long-term liabilities	$ 5.2
Minimum
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Remaining Term Of Contract	1 year
Lessee, Finance Lease, Remaining Term Of Contract	1 year
Lessee, Operating and Finance Leases, Discount Rate	3.50%
Lessee, Operating Lease, Renewal Term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Remaining Term Of Contract	20 years
Lessee, Finance Lease, Remaining Term Of Contract	4 years
Lessee, Operating and Finance Leases, Discount Rate	8.30%
Lessee, Operating Lease, Renewal Term	10 years
Jackalope Gas Gathering Services, LLC
Lessee, Lease, Description [Line Items]
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 2.9