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IFRS 7 Disclosures - Schedule of Maturity of Financial Liabilities (Detail) - CAD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure Of Maturity Analysis For Financial Liabilities [line items] |  |
Long-term debt | $ 6,164 | $ 4,543
Capital instruments | 7,829 | 7,120
Derivatives | 14,962 | 10,284
Deposits from bank clients | 20,889 | 21,488
Lease liabilities | 353 |
Less than 1 year [Member] |  |
Disclosure Of Maturity Analysis For Financial Liabilities [line items] |  |
Long-term debt | 0 | 649
Capital instruments | 350 |
Derivatives | 386 | 332
Deposits from bank clients | 16,783 |
Lease liabilities | 116 |
1 to 3 years [Member] |  |
Disclosure Of Maturity Analysis For Financial Liabilities [line items] |  |
Long-term debt | 0 |
Capital instruments | 0 |
Derivatives | 250 | 145
Deposits from bank clients | 2,591 |
Lease liabilities | 115 |
3 to 5 years [Member] |  |
Disclosure Of Maturity Analysis For Financial Liabilities [line items] |  |
Long-term debt | 0 |
Capital instruments | 584 |
Derivatives | 555 | 218
Deposits from bank clients | 1,515 |
Lease liabilities | 47 |
Over 5 years [Member] |  |
Disclosure Of Maturity Analysis For Financial Liabilities [line items] |  |
Long-term debt | 6,164 | 3,894
Capital instruments | 6,895 |
Derivatives | 13,771 | $ 9,589
Deposits from bank clients | 0 |
Lease liabilities | $ 75 |

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- Definition The amount of instruments issued by the entity that represent indebtedness. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of deposit liabilities from customers held by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
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