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Commitments, Guarantees and Contingencies - Consolidating Summary Financial Information (Details) - CAD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Disclosure of operating segments [line items] |  |
Outstanding preferred shares subject to the guarantee (in shares) | 0 |
Revenue | $ 23,322,000,000 | $ 35,688,000,000
Shareholders’ net income (loss) | 3,130,000,000 | 4,035,000,000
Invested assets | 177,292,000,000 | 184,522,000,000
Total other general fund assets | 28,322,000,000 | 20,852,000,000
Investments for account of segregated fund holders | 125,292,000,000 | 139,996,000,000
Insurance contract liabilities | 140,418,000,000 | 147,811,000,000
Investment contract liabilities | 3,314,000,000 | 3,368,000,000
Total other general fund liabilities | 32,505,000,000 | 26,122,000,000
Subordinated Debt Issued May 15, 1998 |  |
Disclosure of operating segments [line items] |  |
Principal amount | $ 150,000,000 |
Interest rate | 6.30% |
Consolidation Adjustments |  |
Disclosure of operating segments [line items] |  |
Revenue | $ 493,000,000 | (1,219,000,000)
Shareholders’ net income (loss) | (2,798,000,000) | (3,885,000,000)
Invested assets | (34,738,000,000) | (34,245,000,000)
Total other general fund assets | (27,463,000,000) | (48,715,000,000)
Investments for account of segregated fund holders | 0 | 0
Insurance contract liabilities | (8,527,000,000) | (10,283,000,000)
Investment contract liabilities | 0 | 0
Total other general fund liabilities | (19,815,000,000) | (41,849,000,000)
Parent Company | Reportable Legal Entities |  |
Disclosure of operating segments [line items] |  |
Revenue | 603,000,000 | 320,000,000
Shareholders’ net income (loss) | 3,135,000,000 | 4,035,000,000
Invested assets | 31,897,000,000 | 30,984,000,000
Total other general fund assets | 6,594,000,000 | 12,462,000,000
Investments for account of segregated fund holders | 0 | 0
Insurance contract liabilities | 0 | 0
Investment contract liabilities | 0 | 0
Total other general fund liabilities | 9,916,000,000 | 16,020,000,000
Subsidiary Issuer | Reportable Legal Entities | Sun Life Assurance (consolidated) |  |
Disclosure of operating segments [line items] |  |
Revenue | 12,608,000,000 | 27,527,000,000
Shareholders’ net income (loss) | 1,825,000,000 | 2,823,000,000
Invested assets | 167,638,000,000 | 174,777,000,000
Total other general fund assets | 26,400,000,000 | 24,580,000,000
Investments for account of segregated fund holders | 125,242,000,000 | 139,929,000,000
Insurance contract liabilities | 140,415,000,000 | 147,989,000,000
Investment contract liabilities | 3,314,000,000 | 3,368,000,000
Total other general fund liabilities | 24,638,000,000 | 24,249,000,000
Subsidiary Issuer | Reportable Legal Entities | Other subsidiaries of SLF Inc. |  |
Disclosure of operating segments [line items] |  |
Revenue | 9,618,000,000 | 9,060,000,000
Shareholders’ net income (loss) | 968,000,000 | 1,062,000,000
Invested assets | 12,495,000,000 | 13,006,000,000
Total other general fund assets | 22,791,000,000 | 32,525,000,000
Investments for account of segregated fund holders | 50,000,000 | 67,000,000
Insurance contract liabilities | 8,530,000,000 | 10,105,000,000
Investment contract liabilities | 0 | 0
Total other general fund liabilities | $ 17,766,000,000 | $ 27,702,000,000

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