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Supplementary Cash Flow Information - Summary of Supplementary Cash Flow Information (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure Of Supplementary Cash Flow Information [Abstract] |  |  |
Total Current Assets | $ 11,988 | $ 2,976 |
Total Current Liabilities | 7,305 | 2,359 |
Working Capital | 4,683 | 617 |
Adjusted working capital | 3,800 | 653 |
Assets Held for Sale | 1,304 | 0 |
Contingent Payment | 236 | 36 |
Liabilities Related to Assets Held for Sale | 186 | 0 |
Interest Paid | 811 | 381 | $ 457
Interest Received | 24 | 5 | 12
Income Taxes Paid | $ 209 | $ 18 | $ 17

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