Leases (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Apr. 30, 2022
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets, net	$ 23.3		$ 23.3		$ 24.4
Operating leases	11.1		11.1		10.9
Operating leases	15.4		15.4		17.4
Total operating lease liabilities	26.5		26.5		28.3
Finance Lease, Right-of-Use Asset, before Accumulated Amortization	9.8		9.8		13.6
Property, plant and equipment	5,467.5		5,467.5		5,353.2
Finance Lease, Right-of-Use Asset, Accumulated Amortization	4.9		4.9		8.9
Less: accumulated depreciation	999.6		999.6		822.8
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	4.9		4.9		4.7
Property, plant and equipment, net	4,467.9		4,467.9		4,530.4
Finance leases	1.7		1.7		1.9
Finance Lease, Liability, Noncurrent	3.0		3.0		2.7
Finance Lease, Liability	4.7		4.7		$ 4.6
Operating lease expense	3.5	$ 3.4	10.9	$ 9.2
Finance lease expense	$ 0.6	0.9	$ 2.1	2.7
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
Loss on long-lived assets, net	$ 2.6	$ 175.9	$ 4.8	186.9
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Lessee, Lease, Description [Line Items]
Loss on sale				$ 4.1
Sale of assets, consideration						$ 24.7