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Preferred Shares - Preferred Share Dividends Declared (Details) - CAD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Dec. 12, 2022 | Jun. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of classes of share capital [line items] |  |  |  |
Dividends declared per share (in CAD per share) | $ 0.055 |  |  |
Series A |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Total dividends declared |  |  | $ 7 | $ 7
Dividends declared per share (in CAD per share) | 0.17981 |  |  |
Series B |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Total dividends declared |  |  | $ 3 | 1
Dividend rate on preference shares |  |  | 2.00% |
Dividends declared per share (in CAD per share) | 0.37991 |  |  |
Series C |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Total dividends declared |  |  | $ 14 | 11
Dividend rate on preference shares |  | 3.10% |  |
Dividends declared per share (in CAD per share) | 0.36588 |  |  |
Series D |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Total dividends declared |  |  | $ 1 | 0
Dividend rate on preference shares |  | 3.10% | 3.10% |
Dividends declared per share (in CAD per share) | 0.45578 |  |  |
Series E |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Total dividends declared |  |  | $ 13 | 12
Dividend rate on preference shares |  |  | 3.65% |
Dividends declared per share (in CAD per share) | 0.43088 |  |  |
Series G |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Total dividends declared |  |  | $ 8 | 8
Dividends declared per share (in CAD per share) | $ 0.31175 |  |  |
Preferred Shares |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Total dividends declared |  |  | $ 46 | $ 39

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