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Share Capital and Warrants - Issued and Outstanding - Warrants (Details) - CAD ($) shares in Thousands, $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Share Purchase Warrants |  |
Number of Warrants |  |
Outstanding, Beginning of Year | 0 |
Issued Under the Arrangement, Net of Issuance Costs (Note 5A) | 65,433 |
Issued Upon Exercise of Warrants | (314) |
Outstanding, End of Year | 65,119 | 0
Amount |  |
Outstanding, Beginning of Year | $ 0 |
Issued Under the Arrangement, Net of Issuance Costs (Note 5A) | 216 |
Issued Upon Exercise of Warrants | (1) |
Outstanding, End of Year | $ 215 | $ 0
Common shares |  |
Number of Warrants |  |
Outstanding, Beginning of Year | 1,228,870 | 1,228,828
Issued Under the Arrangement, Net of Issuance Costs (Note 5A) | 788,518 | 0
Issued Upon Exercise of Warrants | (314) | 0
Outstanding, End of Year | 2,001,211 | 1,228,870
Amount |  |
Outstanding, Beginning of Year | $ 11,040 | $ 11,040
Issued Under the Arrangement, Net of Issuance Costs (Note 5A) | 6,111 | 0
Issued Upon Exercise of Warrants | (3) | 0
Outstanding, End of Year | $ 17,016 | $ 11,040

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