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Risk Management - Summary of Credit Default Swap Protection Sold (Parenthetical) (Detail) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Disclosure of information about credit exposures designated as measured at fair value through profit or loss [abstract] |  |
Credit protection purchased | $ 0 | $ 0

X
- References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Credit derivative purchased credit protection. + References No definition available. + Details
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Namespace Prefix: | mfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration