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Exploration and Evaluation Assets
 12 Months Ended
Dec. 31, 2021
Exploration For And Evaluation Of Mineral Resources [Abstract]  
Exploration and Evaluation Assets Exploration and Evaluation Assets
 
Exploration and Production
Oil Sands
 Mining and
Upgrading
Total
 
North America
North Sea
Offshore Africa
 
 
Cost
 
 
 
 
 
At December 31, 2019$2,258 $— $69 $252 $2,579 
Additions/Acquisitions
40 — 15 — 55 
Transfers to property, plant and equipment
(194)— — — (194)
Derecognitions and other
(3)— — — (3)
Foreign exchange adjustments
— — (1)— (1)
At December 31, 20202,101 — 83 252 2,436 
Additions/Acquisitions
30 — 8 — 38 
Transfers to property, plant and equipment
(73)— — (150)(223)
Derecognitions and other(1)— — — (1)
At December 31, 2021$2,057 $— $91 $102 $2,250 
On December 17, 2021, the Company completed the acquisition of all the issued and outstanding common shares of Storm Resources Ltd. ("Storm") for total cash consideration of $771 million, including $13 million of exploration and evaluation assets (note 7).
During 2020, the Company completed the acquisition of all the issued and outstanding shares of Painted Pony Energy Ltd. ("Painted Pony") for total cash consideration of $111 million, including $15 million of exploration and evaluation assets (note 7).
During 2019, the Company completed the acquisition of substantially all the assets of Devon Canada Corporation ("Devon") including thermal in situ and heavy crude oil assets, for total cash consideration of $3,412 million, including $91 million of exploration and evaluation assets (note 7).