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Total Invested Assets and Related Net Investment Income - Changes in Asset Fair Value and Currency Change (Details) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Disclosure of fair value measurement of assets [line items] |  |
Total change in fair value through profit or loss assets and liabilities | $ (19,061) | $ (2,437)
Fair value changes on investment properties | 667 | 1,070
Foreign exchange gains (losses) | 535 | (418)
Realized gains (losses) on property and equipment | 100 | 0
Fair value and foreign currency changes on assets and liabilities | (17,759) | (1,785)
Wellesley Office |  |
Disclosure of fair value measurement of assets [line items] |  |
Realized gains (losses) on property and equipment | 100 | 0
Other liabilities |  |
Disclosure of fair value measurement of assets [line items] |  |
Total change in fair value through profit or loss assets and liabilities | 15 | (2)
Cash, cash equivalents and short-term securities |  |
Disclosure of fair value measurement of assets [line items] |  |
Total change in fair value through profit or loss assets and liabilities | 4 | (3)
Debt securities |  |
Disclosure of fair value measurement of assets [line items] |  |
Total change in fair value through profit or loss assets and liabilities | (15,959) | (3,892)
Equity securities |  |
Disclosure of fair value measurement of assets [line items] |  |
Total change in fair value through profit or loss assets and liabilities | (1,125) | 825
Derivative assets |  |
Disclosure of fair value measurement of assets [line items] |  |
Total change in fair value through profit or loss assets and liabilities | (2,148) | 191
Other invested assets |  |
Disclosure of fair value measurement of assets [line items] |  |
Total change in fair value through profit or loss assets and liabilities | $ 152 | $ 444

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- Definition The increase (decrease) in the fair value of a financial asset (or group of financial assets) designated as measured at fair value through profit or loss that is attributable to changes in the credit risk of that asset determined either: (a) as the amount of change in its fair value that is not attributable to changes in market conditions that give rise to market risk ; or (b) using an alternative method the entity believes more faithfully represents the amount of change in its fair value that is attributable to changes in the credit risk of the asset. [Refer: Credit risk [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 9 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_9_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The gains (losses) on disposals of property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 98 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_98_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of exchange differences recognised in profit or loss that arise from foreign currency transactions, excluding those arising on financial instruments measured at fair value through profit or loss in accordance with IFRS 9. [Refer: At fair value [member]; Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 21 -IssueDate 2022-03-24 -Paragraph 52 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=21&code=ifrs-tx-2022-en-r&anchor=para_52_a&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 35 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_35&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The gains (losses) recognised in profit or loss for assets measured at fair value that are attributable to the change in unrealised gains or losses relating to those assets held at the end of the reporting period. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2022-03-24 -Paragraph 93 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_f&doctype=Standard -URIDate 2022-03-24 + Details
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