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Assets Held for Sale and Discontinued Operations - Summary of Assets and Liabilities or Disposal Groups Classified as Held for Sale (Details) - CAD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
ASSETS |  |  |
Cash and cash equivalents | $ 1,883 | $ 1,427 | $ 450
Inventories | 2,685 | 2,390 |
Property, plant and equipment | 40,095 | 37,382 | $ 33,578
TOTAL ASSETS | 52,359 | 47,368 |
Liabilities [abstract] |  |  |
Current portion of lease liabilities | 132 | 127 |
Lease liabilities (Note 20(c)) | 439 | 567 |
Deferred income tax liabilities | 6,778 | 5,973 |
Provisions and other liabilities | 3,166 | 4,023 |
Total liabilities | 25,848 | $ 23,595 |
Discontinued operations |  |  |
ASSETS |  |  |
Cash and cash equivalents | 34 |  |
Inventories | 53 |  |
Prepaid and other current assets | 49 |  |
Financial and other assets | 43 |  |
Property, plant and equipment | 1,387 |  |
TOTAL ASSETS | 1,566 |  |
Liabilities [abstract] |  |  |
Trade accounts payable and other liabilities | 177 |  |
Current portion of lease liabilities | 9 |  |
Current income taxes payable | 46 |  |
Lease liabilities (Note 20(c)) | 200 |  |
Deferred income tax liabilities | 68 |  |
Provisions and other liabilities | 145 |  |
Total liabilities | 645 |  |
Discontinued operations | Quintette |  |  |
ASSETS |  |  |
Cash and cash equivalents | 0 |  |
Inventories | 0 |  |
Prepaid and other current assets | 0 |  |
Financial and other assets | 1 |  |
Property, plant and equipment | 263 |  |
TOTAL ASSETS | 264 |  |
Liabilities [abstract] |  |  |
Trade accounts payable and other liabilities | 5 |  |
Current portion of lease liabilities | 0 |  |
Current income taxes payable | 0 |  |
Lease liabilities (Note 20(c)) | 0 |  |
Deferred income tax liabilities | 50 |  |
Provisions and other liabilities | 35 |  |
Total liabilities | 90 |  |
Discontinued operations | Fort Hills |  |  |
ASSETS |  |  |
Cash and cash equivalents | 34 |  |
Inventories | 53 |  |
Prepaid and other current assets | 49 |  |
Financial and other assets | 42 |  |
Property, plant and equipment | 1,124 |  |
TOTAL ASSETS | 1,302 |  |
Liabilities [abstract] |  |  |
Trade accounts payable and other liabilities | 172 |  |
Current portion of lease liabilities | 9 |  |
Current income taxes payable | 46 |  |
Lease liabilities (Note 20(c)) | 200 |  |
Deferred income tax liabilities | 18 |  |
Provisions and other liabilities | 110 |  |
Total liabilities | $ 555 |  |

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