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Risk Management - Summary of Estimated Expected Credit Losses From All Macoreconomic Scenarios (Detail) $ in Millions	Dec. 31, 2023 CAD ($)
Disclosure In Tabular Form Of Estimated Expected Credit Losses From All Macoreconomic Scenarios [Line Items]
Probability-weighted ECLs	$ 929
Base ECLs	659
Difference – in amount	$ 270
Difference – in percentage	29.08%

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- Definition

Base line expected credit losses.

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No definition available.

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- Definition

Difference in the expected credit losses between the two methods.

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No definition available.

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Namespace Prefix:	mfc_
Data Type:	xbrli:monetaryItemType
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- Definition

Disclosure in tabular form of estimated expected credit losses from all macoreconomic scenarios.

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No definition available.

+ Details

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- Definition

Estimated expected credit loss based on probability.

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No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

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- Definition

Percentage difference in the expected credit losses between the two methods.

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No definition available.

+ Details

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Namespace Prefix:	mfc_
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Balance Type:	na
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