Leases Lease cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Fixed lease cost - operating leases	$ 35.0	$ 40.0	$ 41.6
Finance Lease, Right-of-Use Asset, Amortization	0.0	0.2	0.0
Finance Lease, Interest Expense	0.0	0.3	0.0
Lease, Cost, Excluding Sublease Income	35.0	40.5	41.6
Gain (Loss) On Finance Lease, Liability	$ 9.9	$ 8.5	$ 12.9