Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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-Topic 250
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Name:	us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Income Taxes (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Line Items]
Income tax expense	$ 23.1	$ 14.7	$ 46.5	$ 72.6
Effective income tax rate	27.00%	26.00%	28.00%	21.00%
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