Accounting Policies - Foreign Currency, Severance Costs and Advertising Expenses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Accounting Policies [Abstract]
Foreign currency transaction (losses) gains	$ 19.8	$ (16.8)	$ 8.7
Severance costs	0.0	5.5	6.3
Advertising expenses	$ 4.4	$ 3.9	$ 4.2