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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2021
Property, plant and equipment [abstract]  
Detailed information about property, plant and equipment
 
Exploration and Production
Oil Sands
 Mining and Upgrading
Midstream and Refining
Head
Office
Total
 
North
America
North Sea
Offshore
Africa
 
 
 
 
Cost
 
 
 
 
 
 
 
At December 31, 2019$72,627 

$7,296 

$3,933 

$45,016 

$451 

$466 

$129,789 
Additions/Acquisitions1,789 

104 

94 

1,328 

6 

19 

3,340 
Transfers from E&E assets
194 

— 

— 

— 

— 

— 

194 
Derecognitions and other (1)
(521)

(3)

— 

(634)

— 

— 

(1,158)
Disposals(92)— — — — — (92)
Foreign exchange adjustments and other
— 

(114)

(64)

— 

— 

— 

(178)
At December 31, 202073,997 

7,283 

3,963 

45,710 

457 

485 

131,895 
Additions/Acquisitions
4,146 

208 

48 

1,526 

9 

23 

5,960 
Transfers from E&E assets
73 

— 

— 

150 

— 

— 

223 
Derecognitions and other (1)
(382)

3 

— 

(530)

— 

— 

(909)
Foreign exchange adjustments and other
— 

(56)

(31)

— 

— 

— 

(87)
At December 31, 2021$77,834 $7,438 $3,980 $46,856 $466 $508 $137,082 
Accumulated depletion and depreciation
 
 
 
 
 
At December 31, 2019$46,577 

$5,712 

$2,712 

$6,247 

$153 

$345 

$61,746 
Expense
3,676 

247 

161 

1,668 

15 

25 

5,792 
Derecognitions and other (1)
(521)(3)

— 

(634)— — (1,158)
Disposals(63)— — — — — (63)
Foreign exchange adjustments and other
(28)

(103)

(51)

8 

— 

— 

(174)
At December 31, 202049,641 

5,853 

2,822 

7,289 

168 

370 

66,143 
Expense
3,468 

149 

118 

1,733 

15 

25 

5,508 
Derecognitions and other (1)
(382)

3 

— 

(530)

— 

— 

(909)
Foreign exchange adjustments and other
5 

(54)

(17)

7 

— 

(1)

(60)
At December 31, 2021$52,732 $5,951 $2,923 $8,499 $183 $394 $70,682 
Net book value
- at December 31, 2021$25,102 $1,487 $1,057 $38,357 $283 $114 $66,400 
- at December 31, 2020$24,356 $1,430 $1,141 $38,421 $289 $115 $65,752 
(1) An asset is derecognized when no future economic benefits are expected to arise from its continued use or disposal.
Summary of net assets acquired and liabilities assumed The following provides a summary of the net assets acquired relating to the acquisition:
Property, plant and equipment$1,114 
Exploration and evaluation assets13 
Working capital20 
Long-term debt(183)
Asset retirement obligations(18)
Other long-term liabilities(35)
Deferred tax liability(140)
Net assets acquired $771 
The following provides a summary of the net assets acquired relating to the acquisition:
Property, plant and equipment$750 
Exploration and evaluation assets15 
Other long-term assets204 
Long-term debt(397)
Asset retirement obligations(13)
Other long-term liabilities(442)
Deferred tax asset 211 
Net assets acquired 328 
Less: cash consideration111 
Gain on acquisition$217 
The following provides a summary of the net assets acquired relating to the acquisition:
Property, plant and equipment
$3,325 
Exploration and evaluation assets
91 
Inventory, prepaids and other long-term assets
195 
Accrued liabilities
(21)
Asset retirement obligations
(178)
Net assets acquired$3,412