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Leases (Tables) | 12 Months Ended
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Dec. 31, 2020
Leases [Abstract] |
Adoption of New IFRS Pronouncements | As at December 31, 2020, $730 million (2019 – $762 million) of right-of-use assets are recorded as part of land, buildings, plant and equipment within property, plant and equipment.
(CAD$ in millions) | 2020 | 2019
Opening net book value | $ | 762 |  | $ | 784 |
Additions | 312 |  | 155 |
Depreciation | (166) |  | (145) |
Changes in foreign exchange rates and other | (178) |  | (32) |
Closing net book value | $ | 730 |  | $ | 762 |
Disclosure of Lease Liability Continuity | Lease Liability Continuity
(CAD$ in millions) | 2020 | 2019
As at January 1 | $ | 672 |  | $ | 680 |
Cash flows |  |
Principal payments | (163) |  | (150) |
Interest payments | (37) |  | (39) |
Non-cash changes |  |
Additions | 319 |  | 170 |
Interest expense (Note 10) | 37 |  | 39 |
Changes in foreign exchange and other | (136) |  | (28) |
As at December 31 | $ | 692 |  | $ | 672 |
Less current portion | (119) |  | (160) |
Long-term lease liabilities | $ | 573 |  | $ | 512 |

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