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Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Loss), Net of Tax (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of analysis of other comprehensive income by item [line items] |  |
Accumulated other comprehensive income, beginning balance | $ 1,594 | $ 1,472
Other comprehensiveincome (loss) | (606) | 122
Accumulated other comprehensive income, ending balance | 988 | 1,594
Unrealized foreign currency translation gains (losses), net of hedging activities |  |
Disclosure of analysis of other comprehensive income by item [line items] |  |
Accumulated other comprehensive income, beginning balance | 1,155 | 1,359
Other comprehensiveincome (loss) | (202) | (204)
Accumulated other comprehensive income, ending balance | 953 | 1,155
Unrealized gains (losses) on available-for-sale assets |  |
Disclosure of analysis of other comprehensive income by item [line items] |  |
Accumulated other comprehensive income, beginning balance | 632 | 313
Other comprehensiveincome (loss) | (366) | 319
Accumulated other comprehensive income, ending balance | 266 | 632
Unrealized gains (losses) on cash flow hedges |  |
Disclosure of analysis of other comprehensive income by item [line items] |  |
Accumulated other comprehensive income, beginning balance | (13) | (7)
Other comprehensiveincome (loss) | 6 | (6)
Accumulated other comprehensive income, ending balance | (7) | (13)
Share of other comprehensive income (loss) in joint ventures and associates |  |
Disclosure of analysis of other comprehensive income by item [line items] |  |
Accumulated other comprehensive income, beginning balance | (42) | (33)
Other comprehensiveincome (loss) | (5) | (9)
Accumulated other comprehensive income, ending balance | (47) | (42)
Remeasurement of defined benefit plans |  |
Disclosure of analysis of other comprehensive income by item [line items] |  |
Accumulated other comprehensive income, beginning balance | (283) | (305)
Other comprehensiveincome (loss) | (39) | 22
Accumulated other comprehensive income, ending balance | (322) | (283)
Revaluation surplus on transfers to investment properties |  |
Disclosure of analysis of other comprehensive income by item [line items] |  |
Accumulated other comprehensive income, beginning balance | 145 | 145
Other comprehensiveincome (loss) | 0 | 0
Accumulated other comprehensive income, ending balance | 145 | 145
Participating policyholders |  |
Disclosure of analysis of other comprehensive income by item [line items] |  |
Accumulated other comprehensive income, beginning balance | 5 | 11
Other comprehensiveincome (loss) | (3) | (6)
Accumulated other comprehensive income, ending balance | 2 | 5
Shareholders |  |
Disclosure of analysis of other comprehensive income by item [line items] |  |
Accumulated other comprehensive income, beginning balance | 1,589 | 1,461
Other comprehensiveincome (loss) | (603) | 128
Accumulated other comprehensive income, ending balance | $ 986 | $ 1,589

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- Definition The amount of accumulated items of income and expense (including reclassification adjustments) that are not recognised in profit or loss as required or permitted by other IFRSs. [Refer: IFRSs [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of income and expense (including reclassification adjustments) that is not recognised in profit or loss as required or permitted by IFRSs. [Refer: IFRSs [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 106 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_106_d_ii&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2021-01-01 -Paragraph B12 -Subparagraph b -Clause viii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2021-en-r&anchor=para_B12_b_viii&doctype=Appendix&subtype=B -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 81A -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_81A_b&doctype=Standard -URIDate 2021-03-24 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_91_a&doctype=Standard -URIDate 2021-03-24 + Details
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