XML 133 R115.htm IDEA: XBRL DOCUMENT v3.10.0.1
Employee Defined Benefit Obligations - Summary of Reconciliation for Net Defined Benefit Liability (Detail) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of net defined benefit liability (asset) [Line Items]    
Net defined benefit asset $ (10.0) $ (12.7)
Net defined benefit liability 68.6 44.8
Included in pre-tax profit or loss    
Net defined benefit liability asset included in profit or loss 12.8 2.5
Pension defined benefit plans [member]    
Disclosure of net defined benefit liability (asset) [Line Items]    
Balance, beginning of the year 18.5 50.5
Net defined benefit asset (10.0) (12.7)
Acquisition of PBA 16.5  
Net defined benefit liability 55.5 31.2
Included in pre-tax profit or loss    
Interest expense (income) 0.6 1.5
Past service cost 10.5  
Administrative expenses paid by the Plans 1.7 1.0
Net defined benefit liability asset included in profit or loss 12.8 2.5
Included in other comprehensive income    
Return on the plan assets (excluding interest income) 17.4 (30.1)
Actuarial (gains) losses arising from:    
Changes in demographic assumptions (0.8) (8.1)
Changes in financial assumptions (9.3) 29.5
Experience adjustments 5.5 (5.3)
Effect of movement in exchange rates 1.2 0.8
Net defined benefit liability asset included in other comprehensive income 14.0 (13.2)
Other    
Benefits paid (0.2)  
Contributions by employer (16.1) (21.3)
Other net defined benefit liability asset (16.3) (21.3)
Balance, end of the year 45.5 18.5
Defined benefit obligation [member]    
Included in pre-tax profit or loss    
Past service cost 10.5  
Defined benefit obligation [member] | Pension defined benefit plans [member]    
Disclosure of net defined benefit liability (asset) [Line Items]    
Balance, beginning of the year 397.7 374.6
Acquisition of PBA 80.9  
Included in pre-tax profit or loss    
Interest expense (income) 10.8 10.4
Past service cost 10.5  
Net defined benefit liability asset included in profit or loss 21.3 10.4
Actuarial (gains) losses arising from:    
Changes in demographic assumptions (0.8) (8.1)
Changes in financial assumptions (9.3) 29.5
Experience adjustments 5.5 (5.3)
Effect of movement in exchange rates 11.5 10.2
Net defined benefit liability asset included in other comprehensive income 6.9 26.3
Other    
Benefits paid (12.5) (13.6)
Other net defined benefit liability asset (12.5) (13.6)
Balance, end of the year 494.3 397.7
Fair value of plan assets [member] | Pension defined benefit plans [member]    
Disclosure of net defined benefit liability (asset) [Line Items]    
Balance, beginning of the year (379.2) (324.1)
Acquisition of PBA (64.4)  
Included in pre-tax profit or loss    
Interest expense (income) (10.2) (8.9)
Administrative expenses paid by the Plans 1.7 1.0
Net defined benefit liability asset included in profit or loss (8.5) (7.9)
Included in other comprehensive income    
Return on the plan assets (excluding interest income) 17.4 (30.1)
Actuarial (gains) losses arising from:    
Effect of movement in exchange rates (10.3) (9.4)
Net defined benefit liability asset included in other comprehensive income 7.1 (39.5)
Other    
Benefits paid 12.3 13.6
Contributions by employer (16.1) (21.3)
Other net defined benefit liability asset (3.8) (7.7)
Balance, end of the year $ (448.8) $ (379.2)