Leases - Outstanding Lease Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Leases [Abstract]
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets and deferred charges	Other assets and deferred charges
Right-of-use-asset	$ 45.2	$ 46.9
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other current liabilities	Other current liabilities
Lease liability - current	$ 16.5	$ 14.5
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other non-current liabilities	Other non-current liabilities
Lease liability - non-current	$ 33.8	$ 38.7