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Adoption of IFRS 17 - Additional Information (Detail) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of Detailed Information About Adoption of IFRS 17 [Line Items]
Increase (decrease) in equity		$ 15,766
Contractual service margin liability		21,466
Measurement of insurance contract liabilities effect of equity due to risk adjustments	$ 2,100
Measurement of insurance contract liabilities effect of equity due discount rates	1,500
Measurement of insurance contract liabilities effect of equity due to other revaluation changes	$ 3,100
IFRS 17 [Member]
Disclosure of Detailed Information About Adoption of IFRS 17 [Line Items]
Increase (decrease) in equity		$ 11,997

X

- Definition

The increase (decrease) in equity. [Refer: Equity]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 106
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_106_d&doctype=Standard
-URIDate 2023-03-23

+ Details

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Balance Type:	credit
Period Type:	duration

X

- Definition

Contractual service margin liability.

+ References

No definition available.

+ Details

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X

- Definition

Disclosure of detailed information about adoption of ifrs 17.

+ References

No definition available.

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- Definition

Measurement of insurance contract liabilities effect of equity due discount rates.

+ References

No definition available.

+ Details

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X

- Definition

Measurement of insurance contract liabilities' effect of equity due to other revaluation changes.

+ References

No definition available.

+ Details

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X

- Definition

Measurement of insurance contract liabilities effect of equity due to risk adjustments.

+ References

No definition available.

+ Details

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

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