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Property, Plant and Equipment, Net - Summary of Property, Plant and Equipment (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning Balance | $ 25,411 | $ 27,834
Ending Balance | 34,225 | 25,411
COST |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning Balance | 37,046 | 36,356
Acquisitions (Note 5) | 13,380 |
Additions | 2,515 | 811
Transfers to Liabilities Related to Assets Held for Sale (Note 16) |  | 47
Change in Decommissioning Liabilities | 2 | (6)
Exchange Rate Movements and Other | (136) | (159)
Divestitures | (630) | (3)
Transfers to Assets Held for Sale (Note 16) | (1,276) |
Ending Balance | 50,901 | 37,046
ACCUMULATED DEPRECIATION, DEPLETION AND AMORTIZATION |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning Balance | (11,635) | (8,522)
Depreciation, Depletion and Amortization | 3,999 | 2,223
Impairment Charges (Note 10) (3) | 1,931 | 1,005
Impairment Reversals (Note 10) | (378) |
Exchange Rate Movements and Other | (20) | (115)
Divestitures | 377 |
Transfers to Assets Held for Sale (Note 16) | (114) |
Ending Balance | (16,676) | (11,635)
Oil and Gas Properties |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning Balance | 21,506 | 23,357
Ending Balance | 27,531 | 21,506
Oil and Gas Properties | COST |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning Balance | 29,867 | 29,365
Acquisitions (Note 5) | 8,633 |
Additions | 1,368 | 475
Transfers to Liabilities Related to Assets Held for Sale (Note 16) |  | 47
Change in Decommissioning Liabilities | (63) | (11)
Exchange Rate Movements and Other | 22 | (6)
Divestitures | (630) | (3)
Transfers to Assets Held for Sale (Note 16) | (754) |
Ending Balance | 38,443 | 29,867
Oil and Gas Properties | ACCUMULATED DEPRECIATION, DEPLETION AND AMORTIZATION |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning Balance | (8,361) | (6,008)
Depreciation, Depletion and Amortization | 3,335 | 1,820
Impairment Charges (Note 10) (3) | 0 | 555
Impairment Reversals (Note 10) | (378) |
Exchange Rate Movements and Other | 61 | (22)
Divestitures | 377 |
Transfers to Assets Held for Sale (Note 16) | (90) |
Ending Balance | (10,912) | (8,361)
Processing, Transportation and Storage Assets |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning Balance | 176 | 150
Ending Balance | 175 | 176
Processing, Transportation and Storage Assets | COST |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning Balance | 218 | 183
Acquisitions (Note 5) | 0 |
Additions | 9 | 33
Transfers to Liabilities Related to Assets Held for Sale (Note 16) |  | 0
Change in Decommissioning Liabilities | 1 | 2
Exchange Rate Movements and Other | 0 | 0
Divestitures | 0 | 0
Transfers to Assets Held for Sale (Note 16) | 0 |
Ending Balance | 228 | 218
Processing, Transportation and Storage Assets | ACCUMULATED DEPRECIATION, DEPLETION AND AMORTIZATION |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning Balance | (42) | (33)
Depreciation, Depletion and Amortization | 10 | 9
Impairment Charges (Note 10) (3) | 0 | 0
Impairment Reversals (Note 10) | 0 |
Exchange Rate Movements and Other | 1 | 0
Divestitures | 0 |
Transfers to Assets Held for Sale (Note 16) | 0 |
Ending Balance | (53) | (42)
Manufacturing Assets |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning Balance | 3,476 | 3,981
Ending Balance | 5,923 | 3,476
Manufacturing Assets | COST |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning Balance | 5,671 | 5,577
Acquisitions (Note 5) | 3,901 |
Additions | 1,023 | 243
Transfers to Liabilities Related to Assets Held for Sale (Note 16) |  | 0
Change in Decommissioning Liabilities | 40 | 3
Exchange Rate Movements and Other | (140) | (152)
Divestitures | 0 | 0
Transfers to Assets Held for Sale (Note 16) | 0 |
Ending Balance | 10,495 | 5,671
Manufacturing Assets | ACCUMULATED DEPRECIATION, DEPLETION AND AMORTIZATION |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning Balance | (2,195) | (1,596)
Depreciation, Depletion and Amortization | 526 | 242
Impairment Charges (Note 10) (3) | 1,931 | 450
Impairment Reversals (Note 10) | 0 |
Exchange Rate Movements and Other | (80) | (93)
Divestitures | 0 |
Transfers to Assets Held for Sale (Note 16) | 0 |
Ending Balance | (4,572) | (2,195)
Retail and other |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning Balance | 253 | 346
Ending Balance | 596 | 253
Retail and other | COST |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning Balance | 1,290 | 1,231
Acquisitions (Note 5) | 846 |
Additions | 115 | 60
Transfers to Liabilities Related to Assets Held for Sale (Note 16) |  | 0
Change in Decommissioning Liabilities | 24 | 0
Exchange Rate Movements and Other | (18) | (1)
Divestitures | 0 | 0
Transfers to Assets Held for Sale (Note 16) | (522) |
Ending Balance | 1,735 | 1,290
Retail and other | ACCUMULATED DEPRECIATION, DEPLETION AND AMORTIZATION |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Beginning Balance | (1,037) | (885)
Depreciation, Depletion and Amortization | 128 | 152
Impairment Charges (Note 10) (3) | 0 | 0
Impairment Reversals (Note 10) | 0 |
Exchange Rate Movements and Other | (2) | 0
Divestitures | 0 |
Transfers to Assets Held for Sale (Note 16) | (24) |
Ending Balance | $ (1,139) | $ (1,037)

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