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Commitments and Contingencies - Summary of Condensed Consolidated Statements of Income Information for MFC and MFLP (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Condensed Income Statements, Captions [Line Items] |  |
Total revenue | $ 17,147 | $ 61,821
Net income (loss) attributed to shareholders | 7,294 | 7,105
MFC [Member] |  |
Condensed Income Statements, Captions [Line Items] |  |
Total revenue | 518 | 563
Net income (loss) attributed to shareholders | 7,294 | 7,105
Other subsidiaries of MFC on a combined basis [Member] |  |
Condensed Income Statements, Captions [Line Items] |  |
Total revenue | 17,732 | 62,323
Net income (loss) attributed to shareholders | 7,071 | 6,842
Consolidating adjustments [Member] |  |
Condensed Income Statements, Captions [Line Items] |  |
Total revenue | (1,103) | (1,065)
Net income (loss) attributed to shareholders | (7,071) | (6,842)
Manulife Finance (Delaware), L.P.[Member] |  |
Condensed Income Statements, Captions [Line Items] |  |
Total revenue | 64 | 41
Net income (loss) attributed to shareholders | $ 21 | $ 3

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