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Property, plant and equipment (Tables)
9 Months Ended
Sep. 30, 2020
Statement [LineItems]  
Disclosure of Property Plant and Equipment
Oil and Gas assets/ Facilities, Corporate assets
 
Cost
  
Nine months ended
September 30, 2020
   Year ended
December 31, 2019
 
Balance, beginning of period
  
$
10,388
 
  $10,776 
Capital expenditures
  
 
46
 
   103 
Dispositions
  
 
—  
 
   (52
Transfer from/(to) assets held for sale
  
 
423
 
   (423
Net decommissioning dispositions
  
 
(42
   (16
  
 
 
   
 
 
 
Balance, end of period
  
$
10,815
 
  $10,388 
  
 
 
   
 
 
 
 
Accumulated depletion and depreciation
  
Nine months ended
September 30, 2020
   Year ended
December 31, 2019
 
Balance, beginning of period
  
$
8,709
 
  $8,202 
Depletion and depreciation
  
 
99
 
   236 
Impairments
  
 
763
 
   658 
Transfers from/(to) asset held for sale
  
 
346
 
   (346
Dispositions
  
 
—  
 
   (41
  
 
 
   
 
 
 
Balance, end of period
  
$
9,917
 
  $8,709 
  
 
 
   
 
 
 
 
   As at 
Net book value
  
September 30, 2020
   December 31, 2019 
Total
  
$
898
 
  $1,679 
  
 
 
   
 
 
 
Summary of Right of Use Assets The following table includes a break-down of the categories for right-of-use assets.
Cost
                  
   Office  Transportation  Vehicle   Surface   Total 
Balance, January 1, 2019
  $15  $17  $3   $2   $37 
Additions (Terminations)
   (2  —     1    —      (1
  
 
 
  
 
 
  
 
 
   
 
 
   
 
 
 
Balance, December 31, 2019
  $13  $17  $4   $2   $36 
Additions (Terminations)
   (13  (2  2    —      (13
  
 
 
  
 
 
  
 
 
   
 
 
   
 
 
 
Balance, September 30, 2020
  
$
 

  

 
 
$
15
 
 
$
6
 
  
$
2
 
  
$
23
 
  
 
 
  
 
 
  
 
 
   
 
 
   
 
 
 
Accumulated amortization
                   
   Office  Transportation   Vehicle   Surface   Total 
Balance, January 1, 2019
  $—    $—     $—     $—     $—   
Amortization
   3   6    1    —      10 
  
 
 
  
 
 
   
 
 
   
 
 
   
 
 
 
Balance, December 31, 2019
  $3  $6   $1   $—     $10 
Amortization
   —     4    1    —      5 
Termination
   (3  —      —      —      (3
  
 
 
  
 
 
   
 
 
   
 
 
   
 
 
 
Balance, September 30, 2020
  
$
—  
 
 
$
10
 
  
$
2
 
  
$
—  
 
  
$
12
 
  
 
 
  
 
 
   
 
 
   
 
 
   
 
 
 
 
   As at 
Net book value
  
September 30, 2020
   December 31, 2019 
Total
  
$
11
 
  $26 
  
 
 
   
 
 
 
Summary of Property Plant Equipment And Right Of Use Assets
Total PP&E including Oil and Gas assets, Facilities, Corporate assets and
Right-of-use
assets is as follows:
 
   As at 
PP&E
  
September 30, 2020
   December 31, 2019 
Oil and Gas assets, Facilities, Corporate assets
  
$
898
 
  $1,679 
Right-of-use
assets
  
 
11
 
   26 
  
 
 
   
 
 
 
Total
  
$
909
 
  $1,705