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Share-Based Payments - Narrative (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 CAD ($) shares day $ / shares | Dec. 31, 2020 CAD ($) shares $ / shares | Dec. 31, 2019 shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Average share price at the date of exercise of stock options (in CAD per share) | $ / shares | $ 64.86 | $ 57.21 |
Compensation expense | $ 757,000,000 | $ 540,000,000 |
Weighted average share price, share options granted (in CAD per share) | $ / shares | $ 8.73 | $ 5.99 |
ESOP offering window period | 6 months |  |
Liabilities accrued | $ 377,000,000 | $ 306,000,000 |
Number of options outstanding (in shares) | shares | 3,042,000 | 3,173,000 | 3,074,000
Stock Option |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Vesting period | 4 years |  |
Maximum exercise period | 10 years |  |
Maximum number of common shares that may be issued under the Executive Stock Option Plan (shares) | shares | 29,525,000 |  |
Compensation expense | $ 6,000,000 | $ 4,000,000 |
Employee Share Ownership Plan |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Compensation expense | $ 9,000,000 | 9,000,000 |
Required service period | 1 year |  |
Employee's contribution, percentage match | 50.00% |  |
Annual compensation match maximum, amount | $ 1,500 |  |
U.S. Employee Stock Purchase Plan |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Annual compensation match maximum, amount | $ 25,000 |  |
Sun Share Plan |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of other equity instruments granted in share-based payment arrangement (shares) | shares | 1 |  |
Number of trading days prior to grant date used for unit valuation | day | 5 |  |
General unit holding period | 36 months |  |
MFS Investment Management Share-Based Awards |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Vesting period | 4 years |  |
Compensation expense | $ 529,000,000 | 387,000,000 |
Liabilities accrued | $ 1,088,000,000 | $ 902,000,000 |
Number of options outstanding (in shares) | 0 | 0 |
MFS Investment Management Stock Options, Restricted Shares, and Outstanding Shares |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Liabilities accrued | $ 848,000,000 | $ 713,000,000 |
Bottom of range | Employee Share Ownership Plan |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Employee contribution election | 1.00% |  |
Bottom of range | U.S. Employee Stock Purchase Plan |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Employee contribution election | 1.00% |  |
Discount rate | 10.00% |  |
Bottom of range | Sun Share Plan |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Performance factor multiplier | 0 |  |
Top of range | Employee Share Ownership Plan |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Employee contribution election | 20.00% |  |
Employee's annual compensation, percentage match | 5.00% |  |
Top of range | U.S. Employee Stock Purchase Plan |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Employee contribution election | 10.00% |  |
Top of range | Sun Share Plan |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Performance factor multiplier | 2 |  |

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- Definition The amount of expense from share-based payment transactions with employees. [Refer: Expense from share-based payment transactions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of liabilities arising from share-based payment transactions. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. [Refer: Share-based payment arrangements [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 51 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_51_b_i&doctype=Standard -URIDate 2021-03-24 + Details
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