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EXPLORATION AND EVALUATION ASSETS (Tables)
 12 Months Ended
Dec. 31, 2019
EXPLORATION AND EVALUATION ASSETS  
Exploration and Evaluation Assets rollforward

                                                                                                                                                                                   

($ millions)

 

December 31
2019

 

December 31
2018

 

 

Beginning of year

 

2 319

 

2 052

 

 

Acquisitions and additions (Note 32)

 
193

 
316

 

 

Transfers to oil and gas assets

 

—

 
(31

)

 

Dry hole expenses

 
(66

)
(11

)

 

Disposals

 
(16

)
(16

)

 

Amortization

 

—

 
(1

)

 

Foreign exchange adjustments

 
(2

)
10

 

 

End of year

 

2 428

 

2 319