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Segmented Information - Geographical information (Details) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Segmented Information |  |
Operating revenues, net of royalties | $ 49,092 | $ 58,336
Non-Current Assets | 74,646 | 70,001
Canada |  |
Segmented Information |  |
Operating revenues, net of royalties | 41,948 | 49,169
Non-Current Assets | 71,438 | 66,346
United States |  |
Segmented Information |  |
Operating revenues, net of royalties | 6,447 | 7,544
Non-Current Assets | 2,624 | 2,629
Other foreign |  |
Segmented Information |  |
Operating revenues, net of royalties | 697 | 1,623
Non-Current Assets | $ 584 | $ 1,026

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