Leases (Assets and Liabilities Balance Related to Finance and Operating Leases) (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Leases [Abstract]
Finance lease right-of-use assets	$ 9.3	$ 1.1
Finance Lease, Right-of-Use Asset, Statement of Financial Position Flag	Property, plant and equipment, net of accumulated depreciation of $419.5 and $390.8	Property, plant and equipment, net of accumulated depreciation of $419.5 and $390.8
Operating lease right-of-use assets	$ 23.0	$ 24.1
Finance lease obligations, current portion	$ 1.4	$ 0.4
Operating Lease, Liability, Current, Statement of Financial Position Flag	Other accrued liabilities	Other accrued liabilities
Finance lease obligations, non-current portion	$ 8.1	$ 0.8
Total finance lease obligations	9.5	1.2
Operating lease obligations, current portion	4.2	4.0
Operating lease obligations, non-current portion	19.5	20.6
Total operating lease obligations	$ 23.7	$ 24.6