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Inventories of Crude Oil and Products (Detail) - CAD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Product Information [Line Items] |  |
Crude oil | $ 764 | $ 731
Petroleum products | 396 | 473
Chemical products | 64 | 72
Other | 72 | 21
Total inventories of crude oil and products | $ 1,296 | $ 1,297

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