Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Tax Disclosure [Line Items]
Income tax (benefit) expense	$ (9.3)	$ 36.2
Effective income tax rate	25.00%	17.00%
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