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Integration Costs - Summary of Transaction Costs (Details) - CAD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Business Combinations [Abstract]
Transaction Costs	$ 0	$ 0	$ 0	$ 65
Integration Related Costs	25	24	48	37
Severance Payments	3	10	4	155
Total transaction costs	$ 28	$ 34	$ 52	$ 257

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Business Combinations [Abstract]

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Integration-Related Costs For Transaction Recognized Separately From Acquisition Of Assets And Assumption Of Liabilities In Business Combination

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Severance Costs Recognized Separately From Acquisition Of Assets And Assumption Of Liabilities In Business Combination

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The amount of acquisition-related costs for transactions recognised separately from the acquisition of assets and the assumption of liabilities in business combinations. [Refer: Business combinations [member]]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The amounts recognised for transaction recognised separately from the acquisition of assets and the assumption of liabilities in business combinations. [Refer: Business combinations [member]]

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