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Revenue from Service Contracts - Summary of Revenue from Service Contracts by Service Lines and Reporting Segments (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | $ 10,591 | $ 10,399
Real estate management services [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 332 | 342
Asia [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 1,346 | 1,215
Asia [member] | Real estate management services [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 37 | 36
Canada [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 1,013 | 1,088
Canada [member] | Real estate management services [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 144 | 160
U.S. [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 2,711 | 2,654
U.S. [member] | Real estate management services [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 143 | 137
Other revenue [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 7,717 | 7,577
Other revenue [member] | Investment management and other related fees [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 3,456 | 3,442
Other revenue [member] | Transaction processing, administration, and service fees [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 3,285 | 3,115
Other revenue [member] | Distribution fees and other [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 976 | 1,020
Other revenue [member] | Asia [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 637 | 586
Other revenue [member] | Asia [member] | Investment management and other related fees [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 171 | 164
Other revenue [member] | Asia [member] | Transaction processing, administration, and service fees [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 239 | 223
Other revenue [member] | Asia [member] | Distribution fees and other [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 227 | 199
Other revenue [member] | Canada [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 1,032 | 1,040
Other revenue [member] | Canada [member] | Investment management and other related fees [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 202 | 161
Other revenue [member] | Canada [member] | Transaction processing, administration, and service fees [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 814 | 827
Other revenue [member] | Canada [member] | Distribution fees and other [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 16 | 52
Other revenue [member] | U.S. [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 596 | 631
Other revenue [member] | U.S. [member] | Investment management and other related fees [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 514 | 542
Other revenue [member] | U.S. [member] | Transaction processing, administration, and service fees [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 15 | 17
Other revenue [member] | U.S. [member] | Distribution fees and other [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 67 | 72
Revenue from non-service lines [Member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 2,874 | 2,822
Revenue from non-service lines [Member] | Asia [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 709 | 629
Revenue from non-service lines [Member] | Canada [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | (19) | 48
Revenue from non-service lines [Member] | U.S. [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 2,115 | 2,023
Global wealth and asset management [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 5,710 | 5,562
Global wealth and asset management [member] | Other revenue [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 5,703 | 5,562
Global wealth and asset management [member] | Other revenue [member] | Investment management and other related fees [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 2,770 | 2,773
Global wealth and asset management [member] | Other revenue [member] | Transaction processing, administration, and service fees [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 2,215 | 2,048
Global wealth and asset management [member] | Other revenue [member] | Distribution fees and other [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 718 | 741
Global wealth and asset management [member] | Revenue from non-service lines [Member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 7 |
Corporate and other [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | (189) | (120)
Corporate and other [member] | Real estate management services [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 8 | 9
Corporate and other [member] | Other revenue [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | (251) | (242)
Corporate and other [member] | Other revenue [member] | Investment management and other related fees [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | (201) | (198)
Corporate and other [member] | Other revenue [member] | Transaction processing, administration, and service fees [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | 2 |
Corporate and other [member] | Other revenue [member] | Distribution fees and other [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | (52) | (44)
Corporate and other [member] | Revenue from non-service lines [Member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue from contracts with customers | $ 62 | $ 122

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- Definition The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2020-01-01 -Paragraph 113 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_113_a&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2020-01-01 -Paragraph 114 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_114&doctype=Standard -URIDate 2020-01-01 + Details
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