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Capital Management - Schedule of Total Capital (Details) - CAD ($) $ in Millions | 1 Months Ended |  |  |
--- | --- | --- | --- | ---
Nov. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Entity Location [Line Items] |  |  |  |
Equity |  | $ 28,073 | $ 25,862 |
Total capital |  | 34,698 | 30,843 |
Subordinated debt |  |  |  |
Entity Location [Line Items] |  |  |  |
Borrowings |  | 6,425 | 4,781 |
Proceeds from current borrowings | $ 2,000 |  |  |
Proceeds subject to contractual terms | $ 1,500 |  |  |
Sun Life ExchangEable Capital Securities |  |  |  |
Entity Location [Line Items] |  |  |  |
Borrowings |  | 200 | 200 |
Shares |  |  |  |
Entity Location [Line Items] |  |  |  |
Equity |  | 24,075 | 22,212 |
Participating policyholders |  |  |  |
Entity Location [Line Items] |  |  |  |
Equity |  | 1,700 | 1,368 | $ 1,091
Non-controlling interests’ equity |  |  |  |
Entity Location [Line Items] |  |  |  |
Equity |  | 59 | 25 | 19
Preferred shares | Shares |  |  |  |
Entity Location [Line Items] |  |  |  |
Equity |  | $ 2,239 | $ 2,257 | $ 2,257

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