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Share Capital - Normal Course Issuer Bid (Details) - CAD ($) $ / shares in Units, $ in Millions | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2023 | Feb. 03, 2023 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2021 | Mar. 31, 2021
Share Capital |  |  |  |  |  |  |  |
Shares repurchased | 116,908,000 | 83,959,000 |  |  |  |  |  |
Average repurchase cost per share | $ 43.92 | $ 27.45 |  |  |  |  |  |
Share repurchase cost | $ 5,135 | $ 2,304 |  |  |  |  |  |
Common shares issued and outstanding |  |  |  | 1,330,006,760 |  |  |  |
2022 NCIB |  |  |  |  |  |  |  |
Share Capital |  |  |  |  |  |  |  |
Purchase of shares for cancellation, shares authorized |  |  | 132,900,000 |  | 143,500,000 | 71,650,000 |  |
Percentage of shares issued and outstanding |  |  | 10.00% |  | 10.00% | 5.00% |  |
Shares repurchased | 109,800,000 |  |  |  |  |  |  |
2021 NCIB |  |  |  |  |  |  |  |
Share Capital |  |  |  |  |  |  |  |
Purchase of shares for cancellation, shares authorized |  | 106,700,000 |  |  |  |  | 76,250,000 | 44,000,000
Percentage of shares issued and outstanding |  | 7.00% |  |  |  |  | 5.00% | 2.90%
Shares repurchased | 7,100,000 | 84,000,000.0 |  |  |  |  |  |
Average repurchase cost per share |  | $ 27.45 |  |  |  |  |  |
Share repurchase cost |  | $ 2,300 |  |  |  |  |  |

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- Definition The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 79 -Subparagraph a -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_79_a_iv&doctype=Standard -URIDate 2022-03-24 + Details
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