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SHARE CAPITAL - Normal Course Issuer Bid (Details) - CAD ($) $ / shares in Units, $ in Millions | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Feb. 08, 2022 | Jan. 31, 2022 | Mar. 31, 2021
Share Capital |  |  |  |  |  |
Shares repurchased |  | 83,959,000 | 7,527,000 |  |  |
Average repurchase cost per share |  | $ 27.45 | $ 40.83 |  |  |
Share repurchase cost |  | $ 2,304 | $ 307 |  |  |
2021 NCIB |  |  |  |  |  |
Share Capital |  |  |  |  |  |
Repurchase of shares for cancellation, shares authorized | 76,250,000 | 106,700,000 |  |  |  | 44,000,000
Percentage of shares issued and outstanding | 5.00% | 7.00% |  |  |  | 2.90%
Shares repurchased | 84,000,000.0 |  |  |  |  |
Average repurchase cost per share | $ 27.45 |  |  |  |  |
Share repurchase cost | $ 2,300 |  |  |  |  |
2022 NCIB |  |  |  |  |  |
Share Capital |  |  |  |  |  |
Repurchase of shares for cancellation, shares authorized |  |  |  | 71,650,000 |  |
Percentage of shares issued and outstanding |  |  |  | 5.00% |  |
Common shares outstanding |  |  |  |  | 1,435,748,494 |

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