XML 149 R114.htm IDEA: XBRL DOCUMENT
v3.20.4

Long-Term Debt - Carrying Value of Long Term Debt Instruments (Parenthetical) (Detail) | Sep. 17, 2020
--- | ---
4.90% Senior notes [Member] |
Disclosure of detailed information about borrowings [Line Items] |
Number of basis points | 4.90%

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_DisclosureOfDetailedInformationAboutBorrowingsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt instrument basis points. + References No definition available. + Details
Name: | mfc_DebtInstrumentBasisPoints
Namespace Prefix: | mfc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=mfc_FourPointNineZeroPercentageSeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |