Leases (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Apr. 30, 2022	Dec. 31, 2021
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets, net	$ 18.8		$ 18.8			$ 27.4
Operating leases	9.5		9.5			13.2
Operating leases	13.8		13.8			19.4
Total operating lease liabilities	23.3		23.3			32.6
Finance Lease, Right-of-Use Asset, before Accumulated Amortization	15.1		15.1			12.3
Property, plant and equipment	4,712.3		4,712.3			3,771.5
Finance Lease, Right-of-Use Asset, Accumulated Amortization	10.9		10.9			9.2
Less: accumulated depreciation	916.5		916.5			992.1
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	4.2		4.2			3.1
Property, plant and equipment, net	3,795.8		3,795.8			2,779.4
Finance leases	2.2		2.2			1.7
Finance Lease, Liability, Noncurrent	1.9		1.9			1.2
Finance Lease, Liability	4.1		4.1			$ 2.9
Operating lease expense	2.3	$ 4.3	5.8	$ 9.1
Finance lease expense	$ 0.9	0.9	$ 1.8	1.8
Operating lease, liability, current, extensible enumeration	Accrued expenses and other liabilities		Accrued expenses and other liabilities			Accrued expenses and other liabilities
Finance lease, liability, noncurrent, extensible enumeration	Other long-term liabilities		Other long-term liabilities			Other long-term liabilities
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other liabilities		Accrued expenses and other liabilities			Accrued expenses and other liabilities
Operating lease, liability, noncurrent, extensible enumeration	Other long-term liabilities		Other long-term liabilities			Other long-term liabilities
(Gain) loss on long-lived assets, net	$ 7.2	$ (0.3)	$ 11.0	$ 1.1
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Lessee, Lease, Description [Line Items]
Disposal Group, Including Discontinued Operation, Consideration					$ 24.7
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	$ 0.1		$ 4.1