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EXPLORATION AND EVALUATION ASSETS | 12 Months Ended
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Dec. 31, 2021
EXPLORATION AND EVALUATION ASSETS. |
EXPLORATION AND EVALUATION ASSETS | 18. EXPLORATION AND EVALUATION ASSETS ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31 |  | December 31 | ​
($ millions) |  | 2021 |  | 2020 |
Beginning of year |  | 2 286 |  | 2 428 | ​
Acquisitions and additions |  | 2 |  | 176 | ​
Transfers to oil and gas assets |  | - |  | (170) | ​
Dry hole expenses |  | - |  | (80) | ​
Disposals and derecognition |  | (54) |  | (70) | ​
Foreign exchange adjustments |  | (8) |  | 2 | ​
End of year |  | 2 226 |  | 2 286 | ​
​

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- Definition The entire disclosure for exploration and evaluation assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2021-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=6&code=ifrs-tx-2021-en-r&doctype=Standard&dita_xref=IFRS06_g23-25_TI -URIDate 2021-03-24 + Details
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