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Share Capital and Warrants - Issued and Outstanding - Common Shares (Detail) - Common shares - CAD ($) shares in Thousands, $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2022 | Dec. 31, 2021
Number of Common Shares |  |
Outstanding, Beginning of Year (in shares) | 2,001,211 | 1,228,870
Issued Under the Arrangement, net of Issuance Costs (in shares) | 0 | 788,518
Issued Upon Exercise of Warrants (in shares) | 6,571 | 314
Issued Under Stock Option Plans (in shares) | 9,606 | 535
Purchases of Common Shares Under NCIB (in shares) | (67,779) | (17,026)
Outstanding, End of Period (in shares) | 1,949,609 | 2,001,211
Amount |  |
Outstanding, Beginning of Year | $ 17,016 | $ 11,040
Issued Under the Arrangement, Net of Issuance Costs | 0 | 6,111
Issued Upon Exercise of Warrants | 65 | 3
Issued Under Stock Option Plans | 149 | 7
Purchase of Common Shares Under NCIB | (577) | (145)
Outstanding, End of Period | $ 16,653 | $ 17,016

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