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Insurance Contract Liabilities and Investment Contract Liabilities - Impact of Method and Assumption Changes (Details) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Disclosure of types of insurance contracts [line items] |  |
Net increase (decrease) before income taxes | $ 273 | $ 116
Mortality / Morbidity |  |
Disclosure of types of insurance contracts [line items] |  |
Net increase (decrease) before income taxes | (89) | 113
Policyholder behaviour |  |
Disclosure of types of insurance contracts [line items] |  |
Net increase (decrease) before income taxes | 219 | 207
Expenses |  |
Disclosure of types of insurance contracts [line items] |  |
Net increase (decrease) before income taxes | (202) | (28)
Investment returns |  |
Disclosure of types of insurance contracts [line items] |  |
Net increase (decrease) before income taxes | 416 | (10)
Model enhancements and other |  |
Disclosure of types of insurance contracts [line items] |  |
Net increase (decrease) before income taxes | $ (71) | $ (166)

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The increase (decrease) in insurance liabilities, net of reinsurance. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2023-01-01 -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-b&anchor=para_85&doctype=Standard&book=b -URIDate 2021-03-24 + Details
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- Details
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