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Share Capital and Warrants - Issued and Outstanding - Common Shares (Detail) - Common shares - CAD ($)
shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Number of Common Shares    
Outstanding, Beginning of Year 2,001,211 1,228,870
Issued Under the Arrangement, Net of Issuance Costs (Note 5) 0 788,518
Issued Upon Exercise of Warrants 9,399 314
Issued Under Stock Option Plans 11,069 535
Purchase of Common Shares under NCIBs (112,489) (17,026)
Outstanding, End of Year 1,909,190 2,001,211
Amount    
Outstanding, Beginning of Year $ 17,016 $ 11,040
Issued Under the Arrangement, Net of Issuance Costs (Note 5) 0 6,111
Issued Upon Exercise of Warrants 93 3
Issued Under Stock Option Plans 170 7
Purchase of Common Shares under NCIBs (959) (145)
Outstanding, End of Year $ 16,320 $ 17,016