Commitments and Contingencies Leases (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Expense	$ 7.1	$ 7.3	$ 14.6	$ 14.6
Operating lease, right-of-use assets, net	44.2		44.2		$ 53.8
Accrued expenses and other liabilities	133.8		133.8		161.7
Long-term operating lease liabilities	32.9		32.9		41.5
Property, plant and equipment	3,829.2		3,829.2		3,612.5
Less: accumulated depreciation	786.8		786.8		703.4
Property, plant and equipment, net	3,042.4		3,042.4		2,909.1
Other long-term liabilities	285.7		285.7		301.6
Finance Lease Expense	1.1	$ 1.1	2.2	$ 2.2
Operating Leases
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use assets, net	44.2		44.2		53.8
Accrued expenses and other liabilities	17.8		17.8		18.1
Long-term operating lease liabilities	32.9		32.9		41.5
Operating lease, liability	50.7		50.7		59.6
Finance Lease
Lessee, Lease, Description [Line Items]
Accrued expenses and other liabilities	3.3		3.3		3.2
Property, plant and equipment	14.9		14.9		14.9
Less: accumulated depreciation	7.2		7.2		5.4
Property, plant and equipment, net	7.7		7.7		9.5
Other long-term liabilities	3.6		3.6		5.2
Finance Lease, Liability	$ 6.9		$ 6.9		$ 8.4