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Acquisitions - Summary of Transaction Costs (Details) - CAD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2021
Business Combinations [Abstract] |  |
Transaction Costs | $ 0 | $ 65
Integration Related Costs | 29 | 66
Severance Payments | 16 | 171
Total transaction costs | $ 45 | $ 302

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- Definition Integration-Related Costs For Transaction Recognized Separately From Acquisition Of Assets And Assumption Of Liabilities In Business Combination + References No definition available. + Details
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- Definition Severance Costs Recognized Separately From Acquisition Of Assets And Assumption Of Liabilities In Business Combination + References No definition available. + Details
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- Definition 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]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2021-01-01 -Paragraph B64 -Subparagraph m -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2021-en-r&anchor=para_B64_m&doctype=Appendix&subtype=B -URIDate 2021-03-24 + Details
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