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Segments Disclosures - Geographic Information (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of geographical areas [line items] |  |  |
Total revenue from contracts with customers | $ 2,976 | $ 2,721 | $ 2,101
PP&E | 5,556 | 5,320 | 5,822
Right-of-use assets | 126 | 95 | 141
Intangible assets | 252 | 256 | 313
Total long-term other assets | 160 | 142 |
Canada |  |  |
Disclosure of geographical areas [line items] |  |  |
Total revenue from contracts with customers | 1,905 | 1,854 | 1,227
PP&E | 3,817 | 4,051 |
Right-of-use assets | 49 | 52 |
Intangible assets | 123 | 141 |
Total long-term other assets | 62 | 15 |
US |  |  |
Disclosure of geographical areas [line items] |  |  |
Total revenue from contracts with customers | 940 | 731 | 716
PP&E | 1,307 | 860 |
Right-of-use assets | 74 | 39 |
Intangible assets | 101 | 85 |
Total long-term other assets | 34 | 61 |
Australia |  |  |
Disclosure of geographical areas [line items] |  |  |
Total revenue from contracts with customers | 131 | 136 | $ 158
PP&E | 432 | 409 |
Right-of-use assets | 3 | 4 |
Intangible assets | 28 | 30 |
Total long-term other assets | $ 64 | $ 66 |

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