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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2022
Property, plant and equipment [abstract]  
Detailed Information About Property, Plant and Equipment
 
Exploration and Production
Oil Sands
 Mining and Upgrading
Midstream and Refining
Head
Office
Total
 
North
America
North Sea
Offshore
Africa
 
 
 
 
Cost
 
 
 
 
 
 
 
At December 31, 2020$73,997 $7,283 $3,963 $45,710 $457 $485 $131,895 
Additions/Acquisitions4,146 208 48 1,526 9 23 5,960 
Transfers from exploration and evaluation assets
73 — — 150 — — 223 
Derecognitions (1)
(382)3 — (530)— — (909)
Foreign exchange adjustments and other
— (56)(31)— — — (87)
At December 31, 202177,834 7,438 3,980 46,856 466 508 137,082 
Additions/Acquisitions
3,564 304 75 1,380 8 25 5,356 
Transfers from exploration and evaluation assets
71 — — — — — 71 
Derecognitions (1)
(394)(1)— (469)— — (864)
Disposals— — — (35)— — (35)
Foreign exchange adjustments and other
— 517 277 — — 3 797 
At December 31, 2022$81,075 $8,258 $4,332 $47,732 $474 $536 $142,407 
Accumulated depletion and depreciation
 
 
 
 
 
At December 31, 2020$49,641 $5,853 $2,822 $7,289 $168 $370 $66,143 
Expense
3,468 149 118 1,733 15 25 5,508 
Derecognitions (1)
(382)3 — (530)— — (909)
Foreign exchange adjustments and other
5 (54)(17)7 — (1)(60)
At December 31, 202152,732 5,951 2,923 8,499 183 394 70,682 
Expense
3,502 117 148 1,684 15 23 5,489 
Derecognitions (1)
(394)(1)— (469)— — (864)
Disposals— — — (2)— — (2)
Recoverability charge— 1,620 — — — — 1,620 
Foreign exchange adjustments and other
(5)419 206 — — 3 623 
At December 31, 2022$55,835 $8,106 $3,277 $9,712 $198 $420 $77,548 
Net book value
At December 31, 2022$25,240 $152 $1,055 $38,020 $276 $116 $64,859 
At December 31, 2021$25,102 $1,487 $1,057 $38,357 $283 $114 $66,400 
(1)An asset is derecognized when no future economic benefits are expected to arise from its continued use or disposal.
Summary of Net Assets Acquired and Liabilities Assumed The following provides a summary of the net assets acquired relating to the acquisition:
Property, plant and equipment$1,114 
Exploration and evaluation assets13 
Working capital20 
Long-term debt(183)
Asset retirement obligations(18)
Other long-term liabilities(35)
Deferred tax liability(140)
Net assets acquired $771 
The following provides a summary of the gain on acquisition:
Net assets acquired $328 
Less: cash consideration111 
Gain on acquisition$217