XML 172 R137.htm IDEA: XBRL DOCUMENT
v3.20.4

Employee Future Benefits - Summary of Disaggregation of Defined Benefit Obligation (Detail) - CAD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Pension defined benefit plans [member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Disaggregation of defined benefit obligation | $ 4,901 | $ 4,817
Retiree welfare plans [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Disaggregation of defined benefit obligation | 638 | 645
U.S. plans [Member] | Pension defined benefit plans [member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Disaggregation of defined benefit obligation | 3,079 | 3,079
U.S. plans [Member] | Pension defined benefit plans [member] | Active [member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Disaggregation of defined benefit obligation | 551 | 550
U.S. plans [Member] | Pension defined benefit plans [member] | Inactive and retired members [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Disaggregation of defined benefit obligation | 2,528 | 2,529
U.S. plans [Member] | Retiree welfare plans [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Disaggregation of defined benefit obligation | 472 | 478
U.S. plans [Member] | Retiree welfare plans [Member] | Active [member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Disaggregation of defined benefit obligation | 27 | 31
U.S. plans [Member] | Retiree welfare plans [Member] | Inactive and retired members [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Disaggregation of defined benefit obligation | 445 | 447
Canadian plans [Member] | Pension defined benefit plans [member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Disaggregation of defined benefit obligation | 1,822 | 1,738
Canadian plans [Member] | Pension defined benefit plans [member] | Active [member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Disaggregation of defined benefit obligation | 211 | 301
Canadian plans [Member] | Pension defined benefit plans [member] | Inactive and retired members [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Disaggregation of defined benefit obligation | 1,611 | 1,437
Canadian plans [Member] | Retiree welfare plans [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Disaggregation of defined benefit obligation | 166 | 167
Canadian plans [Member] | Retiree welfare plans [Member] | Active [member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Disaggregation of defined benefit obligation |  | 25
Canadian plans [Member] | Retiree welfare plans [Member] | Inactive and retired members [Member] |  |
Disclosure of defined benefit plans [Line Items] |  |
Disaggregation of defined benefit obligation | $ 166 | $ 142

X
- Definition The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. [Refer: Plan assets, at fair value] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_57_a&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DefinedBenefitObligationAtPresentValue
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfDefinedBenefitPlansLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=ifrs-full_PensionDefinedBenefitPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=mfc_RetireeWelfarePlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ActuarialAssumptionsAxis=mfc_UsPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_NetDefinedBenefitLiabilityAssetAxis=mfc_ActiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_NetDefinedBenefitLiabilityAssetAxis=mfc_InactiveAndRetiredMembersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ActuarialAssumptionsAxis=mfc_CanadianPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |