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Employee Future Benefits (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of defined benefit plans [line items] |  |  |
Administration expenses | $ 1 | $ 1 | $ 2
Weighted average duration of defined benefit obligation | 13 years 7 months 6 days |  |
Minimum |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Employer contribution (as percent) | 500.00% |  |
Maximum |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Employer contribution (as percent) | 1000.00% |  |
Registered |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Administration expenses | $ 1 | 1 | 2
Registered | Letter of credit |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Letter of credit, posted | 97 |  |
Registered | Related parties [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Administration expenses | 0 | 0 |
Supplemental Pension Plan |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Administration expenses | $ 0 | 0 | 0
Other |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Maximum age disabled and retired members eligible for benefits | 65 years |  |
Administration expenses | $ 0 | $ 0 | $ 0

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- Definition The amount of the exposure to credit risk on loan commitments and financial guarantee contracts. [Refer: Loan commitments [member]; Financial guarantee contracts [member]; Credit risk [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 35H -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_35H&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 35I -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_35I&doctype=Standard -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 35M -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_35M&doctype=Standard -URIDate 2021-03-24 + Details
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