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Leases (Tables)
 12 Months Ended
Dec. 31, 2019
Leases [Abstract]  
Adoption of New IFRS Pronouncements
Our significant lease arrangements include contracts for leasing office premises, mining equipment, rail cars, pipelines and road and port facilities. As at December 31, 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)
 
Net book value as at December 31, 2018
$
504

   IFRS 16 adoption (Note 33(a))
280

   Additions
155

   Depreciation
(145
)
   Changes in foreign exchange rates and other
(32
)
Closing net book value as at December 31, 2019
$
762
Disclosure of Maturity Analysis of Lease Liabilities
Minimum lease payments in respect of lease liabilities and the effect of discounting are as follows:
(CAD$ in millions)
 
December 31,
2019

Undiscounted minimum lease payments:
 
 
   Less than one year
 
$
162

   Two to three years
 
193

   Four to five years
 
109

   Thereafter
 
676

 
 
1,140

Effect of discounting
 
(468
)
Present value of minimum lease payments - total lease liabilities
 
672

Less current portion
 
(160
)
Long-term lease liabilities
 
$
512
Disclosure of Lease Liability Continuity
Lease Liability Continuity
(CAD$ in millions)
 
As at December 31, 2018
$
338

IFRS 16 adoption (Note 33(a))
342

Cash flows


   Principal payments
(150
)
   Interest payments
(39
)
Non-cash changes


   Additions
170

   Accretion (Note 10)
39

   Changes in foreign exchange and other
(28
)
As at December 31, 2019
$
672