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Income Taxes - Summary of Major Components of Deferred Income Tax (Recovery) Expense from Continuing Operations (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Taxes [Abstract]
Origination and reversal of timing differences	$ (2.3)	$ (17.0)
Unrecognized tax losses and temporary differences	0.9	0.8
Change of tax rates	(2.4)	(1.7)
Recovery arising from previously unrecognized tax assets	(0.6)	(4.0)
Deferred income tax recovery	$ (4.4)	$ (21.9)

X

- Definition

The amount of deferred tax expense arising from the write-down, or reversal of a previous write-down, of a deferred tax asset. [Refer: Deferred tax assets]

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- Definition

The amount of tax expense (income) relating to changes in deferred tax liabilities and deferred tax assets. [Refer: Deferred tax assets; Deferred tax liabilities]

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The amount of deferred tax expense or income relating to the creation or reversal of temporary differences. [Refer: Temporary differences [member]; Deferred tax expense (income)]

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The amount of deferred tax expense or income relating to tax rate changes or the imposition of new taxes. [Refer: Deferred tax expense (income)]

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The amount of benefit arising from a previously unrecognised tax loss, tax credit or temporary difference of a prior period that is used to reduce deferred tax expense. [Refer: Deferred tax expense (income); Temporary differences [member]; Unused tax losses [member]; Unused tax credits [member]]

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- Definition

Income Taxes

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