Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Line Items]
Undistributed earnings of foreign subsidiaries	$ 113.1
Capital loss carry-forwards	60.7	$ 1.8
Gross unrecognized tax benefits	25.1	16.0	$ 18.9
Unrecognized tax benefits that would impact effective tax rate	13.6	6.9
Accrued interest and penalties	4.4	3.5
Interest and penalties	0.6	0.4
Capital Loss Carryforward
Income Tax Disclosure [Line Items]
Capital loss carry-forwards	73.4	$ 82.5
Canada Revenue Agency | Maximum
Income Tax Disclosure [Line Items]
Federal and provincial income tax estimated, exclusive of interest and penalties	30.0
Canada Revenue Agency | Minimum
Income Tax Disclosure [Line Items]
Federal and provincial income tax estimated, exclusive of interest and penalties	$ 26.0