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Leases (Tables)
12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
Adoption of New IFRS Pronouncements As at December 31, 2021, $704 million (2020 – $730 million) of right-of-use assets are recorded as part of land, buildings, plant and equipment within property, plant and equipment.
(CAD$ in millions)20212020
Opening net book value$730 $762 
   Additions141 312 
   Depreciation(163)(166)
   Changes in foreign exchange rates and other(4)(178)
Closing net book value $704 $730 
Disclosure of Lease Liability Continuity Lease Liability Continuity
(CAD$ in millions)20212020
As at January 1$692 $672 
Cash flows
   Principal payments(139)(163)
   Interest payments(35)(37)
Non-cash changes
   Additions151 319 
   Interest expense (Note 9)
35 37 
   Changes in foreign exchange and other(10)(136)
As at December 31$694 $692 
Less current portion (127)(119)
Long-term lease liabilities$567 $573