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Exploration And Evaluation Assets | 12 Months Ended
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Dec. 31, 2018
EXPLORATION AND EVALUATION ASSETS |
EXPLORATION AND EVALUATION ASSETS | 16. EXPLORATION AND EVALUATION ASSETS
($ millions) |  | 2018 |  | 2017 |  |
Beginning of year |  | 2 052 |  | 2 038 |  |
Acquisitions and additions (Note 31) |  | 316 |  | 53 |  |
Transfers to oil and gas assets |  | (31 | ) | — |  |
Dry hole expenses |  | (11 | ) | (41 | ) |
Disposals |  | (16 | ) | — |  |
Amortization |  | (1 | ) | (1 | ) |
Foreign exchange adjustments |  | 10 |  | 3 |  |
End of year |  | 2 319 |  | 2 052 |  |

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