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Commitments, Guarantees and Contingencies - Consolidating Summary Financial Information (Details) - CAD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of operating segments [line items] |  |
Outstanding preferred shares subject to the guarantee (in shares) | 0 |
Revenue | $ 35,688,000,000 | $ 43,337,000,000
Shareholders’ net income (loss) | 4,035,000,000 | 2,498,000,000
Invested assets | 184,522,000,000 | 177,912,000,000
Total other general fund assets | 20,852,000,000 | 19,178,000,000
Investments for account of segregated fund holders | 139,996,000,000 | 125,921,000,000
Insurance contract liabilities | 147,811,000,000 | 145,773,000,000
Investment contract liabilities | 3,368,000,000 | 3,189,000,000
Total other general fund liabilities | 26,122,000,000 | 22,266,000,000
Sun Life Assurance 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 | $ (1,219,000,000) | (2,160,000,000)
Shareholders’ net income (loss) | (3,885,000,000) | (2,379,000,000)
Invested assets | (34,245,000,000) | (30,520,000,000)
Total other general fund assets | (48,715,000,000) | (33,640,000,000)
Investments for account of segregated fund holders | 0 | 0
Insurance contract liabilities | (10,283,000,000) | (10,813,000,000)
Investment contract liabilities | 0 | 0
Total other general fund liabilities | (41,849,000,000) | (26,745,000,000)
Parent Company | Reportable Legal Entities |  |
Disclosure of operating segments [line items] |  |
Revenue | 320,000,000 | 266,000,000
Shareholders’ net income (loss) | 4,035,000,000 | 2,498,000,000
Invested assets | 30,984,000,000 | 26,019,000,000
Total other general fund assets | 12,462,000,000 | 7,800,000,000
Investments for account of segregated fund holders | 0 | 0
Insurance contract liabilities | 0 | 0
Investment contract liabilities | 0 | 0
Total other general fund liabilities | 16,020,000,000 | 9,350,000,000
Subsidiary Issuer | Reportable Legal Entities | Sun Life Assurance (consolidated) |  |
Disclosure of operating segments [line items] |  |
Revenue | 27,527,000,000 | 35,801,000,000
Shareholders’ net income (loss) | 2,823,000,000 | 1,349,000,000
Invested assets | 174,777,000,000 | 172,439,000,000
Total other general fund assets | 24,580,000,000 | 24,327,000,000
Investments for account of segregated fund holders | 139,929,000,000 | 125,859,000,000
Insurance contract liabilities | 147,989,000,000 | 145,949,000,000
Investment contract liabilities | 3,368,000,000 | 3,189,000,000
Total other general fund liabilities | 24,249,000,000 | 25,920,000,000
Subsidiary Issuer | Reportable Legal Entities | Other Subsidiaries |  |
Disclosure of operating segments [line items] |  |
Revenue | 9,060,000,000 | 9,430,000,000
Shareholders’ net income (loss) | 1,062,000,000 | 1,030,000,000
Invested assets | 13,006,000,000 | 9,974,000,000
Total other general fund assets | 32,525,000,000 | 20,691,000,000
Investments for account of segregated fund holders | 67,000,000 | 62,000,000
Insurance contract liabilities | 10,105,000,000 | 10,637,000,000
Investment contract liabilities | 0 | 0
Total other general fund liabilities | $ 27,702,000,000 | $ 13,741,000,000

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