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Investments (Tables)
 12 Months Ended
Dec. 31, 2021
Financial Instruments [Abstract]  
Summary of investments
As at December 31, 2021 and 2020, the Company had the following investments:
2021

2020
Investment in PrairieSky Royalty Ltd.
$309 

$228 
Investment in Inter Pipeline Ltd.
— 

77 
$309 $305 
The (gain) loss from the investment in PrairieSky was comprised as follows:        
2021

2020

2019
(Gain) loss from investment
$(81)

$117 

$55 
Dividend income
(7)

(9)

(17)
$(88)$108 $38 
The (gain) loss from the investment in Inter Pipeline was comprised as follows:    
2021

2020

2019
(Gain) loss from investment
$(51)

$68 

$(21)
Dividend income
(2)

(5)

(11)
$(53)$63 $(32)