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IFRS 7 Disclosures - Summary of Potential Impact to MLI's LICAT Total Ratio Resulting from Changes in Public Equity Market Values (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
-30% [member] |  |
Statement [line items] |  |
Impact on MLI's LICAT total ratio | (300) | (500)
-20% [member] |  |
Statement [line items] |  |
Impact on MLI's LICAT total ratio | (100) | (300)
-10% [member] |  |
Statement [line items] |  |
Impact on MLI's LICAT total ratio | (100) | (100)
10% [member] |  |
Statement [line items] |  |
Impact on MLI's LICAT total ratio |  | 100
20% [member] |  |
Statement [line items] |  |
Impact on MLI's LICAT total ratio |  | 400
30% [member] |  |
Statement [line items] |  |
Impact on MLI's LICAT total ratio | (100) | 500

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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