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Other long-term obligations
 12 Months Ended
Dec. 31, 2019
Other long-term obligations
6. Other long-term obligations
millions of Canadian dollars
  
2019
 
 
 
          2018
  
Employee retirement benefits
(a) (note 5)
  
 
1,822
 
    
1,195
 
Asset retirement obligations and other environmental liabilities
(b) (d)
  
 
1,388
 
    
1,435
 
Share-based incentive compensation liabilities
(note 8)
  
 
65
 
    
78
 
Operating lease liability
(c) (note 14)
  
 
143
 
    
-
 
Other obligations
  
 
219
 
    
235
 
Total other long-term obligations
  
 
3,637
 
    
2,943
 
(a)
Total recorded employee retirement benefits obligations also included $58
 million in current liabilities (2018 – $55
 
million).
  
(b)
Total asset retirement obligations and other environmental liabilities also included $124
 million in current liabilities (2018 – $118
 
million).
  
(c)
Effective January 1, 2019, Imperial adopted the Financial Accounting Standards Board’s standard,
Leases (Topic 842),
as amended. The standard requires all leases to be recorded on the balance sheet as a right of use asset and liability. The long-term lease liability for operating leases is included in Other long-term obligations (see note 14).
  
(d)
For 2019, the asset retirement obligations were discounted at 6
 percent (2018 - 6
 
percent).
 
 
Asset retirement obligations incurred in the current period were Level 3 fair value measurements. The following table summarizes the activity in the liability for asset retirement obligations:
 
millions of Canadian dollars
  
2019
 
 
          2018
 
Balance as at January 1
  
 
1,417
 
 
 
1,397
 
Additions (deductions)
  
 
(23
) 
 
 
(5
) 
Accretion
  
 
80
 
 
 
85
 
Settlement
  
 
(74
) 
 
 
(60
) 
Balance as at December 31
  
 
1,400
 
 
 
1,417