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Other comprehensive income (loss) information (Tables)
 3 Months Ended
Mar. 31, 2022
Changes in Accumulated Other Comprehensive Income (Loss)
Changes in accumulated other comprehensive income (loss):
 
 
 
 
 
 
 
 
 
 
millions of Canadian dollars
   
 
    2022
 
            2021  
Balance at January 1
   
 
(1,177
) 
        (1,989 ) 
Postretirement benefits liability adjustment:
                    
Current period change excluding amounts reclassified from accumulated other comprehensive income
   
 
24
 
        54  
Amounts reclassified from accumulated other comprehensive income
   
 
21
 
        33   
 
Balance at March 31
   
 
 
 
(1,132
 
) 
     
 
 
 
(1,902
 
) 
Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) - Before Tax Income (Expense)
 
 
 
 
 
 
Amounts reclassified out of accumulated other comprehensive income (loss) - before tax income (expense):
 
 
 
 
 
 
 
 
 
   
    
 
Three Months
 
       to March 31  
millions of Canadian dollars
   
 
    2022
 
            2021  
Amortization of postretirement benefits liability adjustment included in net benefit cost
(a)
   
 
(28
) 
        (44 )  
(a) This accumulated other comprehensive income component is included in the computation of net benefit cost (note 4).
 
Income Tax Expense (Credit) for Components of Other Comprehensive Income (Loss)
 
 
 
 
 
 
Income tax expense (credit) for components of other comprehensive income (loss):
 
 
 
 
 
 
 
 
 
   
       Three Months  
     to March 31  
millions of Canadian dollars
   
 
    2022
 
            2021  
Postretirement benefits liability adjustments:
                    
Postretirement benefits liability adjustment (excluding amortization)
   
 
8
 
        17  
Amortization of postretirement benefits liability adjustment included in net benefit cost
   
 
7
 
        11  
     
Total
   
 
15
 
        28