XML 147 R122.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Long-Term Debt - Carrying Value of Long Term Debt Instruments (Parenthetical) (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2018
5.375% Senior notes [Member] |
Disclosure of detailed information about borrowings [Line Items] |
Number of basis points | 0.40%
3.527% Senior notes [Member] |
Disclosure of detailed information about borrowings [Line Items] |
Number of basis points | 0.20%
4.150% Senior notes [Member] |
Disclosure of detailed information about borrowings [Line Items] |
Number of basis points | 0.35%
4.90% Senior notes [Member] |
Disclosure of detailed information about borrowings [Line Items] |
Number of basis points | 0.35%

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_FivePointThreeSevenFivePercentageSeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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