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Commitments and Contingencies - Schedule of Pledged Assets (Parenthetical) (Detail) - CAD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure Of Pledged Assets [line items] |  |
Borrowings outstanding on the basis of which collateral is given | $ 16,429 | $ 11,678
Federal Home Loan Bank of Indianapolis [Member] | John Hancock Subsidiaries LLC [member] |  |
Disclosure Of Pledged Assets [line items] |  |
Collateral to be placed minimum requirement | 937 |
Borrowings outstanding on the basis of which collateral is given | 500 |
Excess collateral that can be called back | $ 1,853 |

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- Definition The fair value of collateral held that is permitted to be sold or repledged in the absence of default by the owner of the collateral. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 15 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_15_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The gross amount of recognised financial liabilities that are subject either to offsetting or to an enforceable master netting arrangement or similar agreement. [Refer: Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 13C -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_13C_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition Pledged assets. + References No definition available. + Details
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- Details
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- Details
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