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Accounting and Reporting Changes - Schedule of Balance Sheet and Related Adjustments as of IFRS 17 (Parenthetical) (Detail) - Insurance contract [member] $ in Billions	Jan. 01, 2022 CAD ($)
Non-controlling Interests [Member]
Schedule Of Detailed Information About Balance Sheet And Related Adjustments As Of IFRS 17 [Line Items]
Contractual service margin	$ 0.7
Shareholder Net Income [Member]
Schedule Of Detailed Information About Balance Sheet And Related Adjustments As Of IFRS 17 [Line Items]
Contractual service margin	$ 1.4

X

- Definition

The amount of the contractual service margin. [Refer: Contractual service margin [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2023-01-01
-Name IFRS
-Number 17
-IssueDate 2022-03-24
-Paragraph 109
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2022-en-r&anchor=para_109&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_ContractualServiceMargin
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	mfc_ScheduleOfDetailedInformationAboutBalanceSheetAndRelatedAdjustmentsAsOfIfrs17LineItems
Namespace Prefix:	mfc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_InsuranceContractsAxis=mfc_InsuranceContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ComponentsOfEquityAxis=ifrs-full_NoncontrollingInterestsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ComponentsOfEquityAxis=mfc_ShareholderNetIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: