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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).

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