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Provisions and Other Liabilities (Tables)
 12 Months Ended
Dec. 31, 2019
Other Provisions, Contingent Liabilities And Contingent Assets [Abstract]  
Summary of Provisions and Other Liabilities
2
Summary of Movements in Provisions
The following table summarizes the movements in provisions for the year ended December 31, 2019:
(CAD$ in millions)
 
Decommissioning and
Restoration Provisions

 
Other

 
Total

As at January 1, 2019
 
$
1,614

 
$
194

 
$
1,808

Settled during the year
 
(67
)
 
(45
)
 
(112
)
Change in discount rate
 
527

 
—

 
527

Change in amount and timing of cash flows
 
69

 
91

 
160

Accretion
 
112

 
2

 
114

Other
 
5

 
—

 
5

Changes in foreign exchange rates
 
(26
)
 
(6
)
 
(32
)
As at December 31, 2019
 
2,234

 
236

 
2,470

Less current portion of provisions (Note 18)
 
(90
)
 
(35
)
 
(125
)
Long-term provisions
 
$
2,144

 
$
201

 
$
2,345