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Goodwill
 12 Months Ended
Dec. 31, 2019
Intangible Assets [Abstract]  
Goodwill
Goodwill
(CAD$ in millions)
 
Steelmaking
Coal Operations

 
Quebrada
Blanca

 
Total

January 1, 2018
 
$
702

 
$
385

 
$
1,087

Changes in foreign exchange rates
 
—

 
34

 
34

December 31, 2018
 
$
702

 
$
419

 
$
1,121

Changes in foreign exchange rates
 
—

 
(20
)
 
(20
)
December 31, 2019
 
$
702

 
$
399

 
$
1,101



The results of our annual goodwill impairment analysis and key assumptions used in the analysis are outlined in Notes 8(b) and 8(c).