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SHARE CAPITAL - Common Shares (Details) - CAD ($) shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Balance at beginning of period (in shares) | 2,025 |  |
Shares issued, net of issue costs (in shares) | 103 |  |
Shares issued, net of issue costs | $ 4,485 |  |
Shares issued on vesting of RSU, net of tax (in shares) | 0 |  |
Shares issued on vesting of RSUs, net of tax | $ 12 |  |
Balance at end of period (in shares) | 2,125 | 2,025 |
Common Shares |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Balance at beginning of period (in shares) | 2,025 | 2,026 | 2,026
Balance at beginning of period, amount | $ 64,760 | $ 64,799 | $ 64,768
Shares issued on exercise of stock options (in shares) | 0 | 2 | 0
Shares issued on exercise of stock options | $ 3 | $ 53 | $ 31
Share purchases at stated value (in shares) | (3) | (3) | 0
Share purchases at stated value | $ (80) | $ (88) | $ 0
Other ( in shares) | 0 | 0 | 0
Other | $ 0 | $ (4) | $ 0
Balance at end of period (in shares) | 2,125 | 2,025 | 2,026
Balance at end of period, amount | $ 69,180 | $ 64,760 | $ 64,799

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