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Commitments and Contingencies - Summary of Condensed Consolidated Statements of Financial Position for MFC and MFLP (Detail) - CAD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Invested assets | $ 414,001 | $ 427,098 |
Total other assets | 86,378 | 90,757 |
Segregated funds net assets | 348,562 | 399,788 |
Insurance contract liabilities | 371,405 | 392,275 | $ 385,554
Investment contract liabilities | 3,248 | 3,117 |
Segregated funds net liabilities | 348,562 | 399,788 |
Total other liabilities | 69,347 | 63,594 |
MFC [Member] |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Invested assets | 63 | 78 |
Total other assets | 67,543 | 68,866 |
Total other liabilities | 11,545 | 10,536 |
Other subsidiaries of MFC on a combined basis [Member] |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Invested assets | 413,938 | 427,020 |
Total other assets | 90,687 | 94,615 |
Segregated funds net assets | 348,562 | 399,788 |
Insurance contract liabilities | 371,405 | 392,275 |
Investment contract liabilities | 3,248 | 3,117 |
Segregated funds net liabilities | 348,562 | 399,788 |
Total other liabilities | 58,246 | 53,962 |
Consolidating adjustments [Member] |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Total other assets | (71,852) | (72,724) |
Total other liabilities | (444) | (904) |
Manulife Finance (Delaware), L.P.[Member] |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Invested assets | 21 | 3 |
Total other assets | 950 | 1,088 |
Total other liabilities | $ 712 | $ 852 |

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