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Pension and Other Benefits (Tables)
 9 Months Ended
Sep. 30, 2019
Retirement Benefits [Abstract]  
Net Periodic Benefit Cost for Defined Benefit Pension Plans and Other Benefits
Net periodic benefit costs for defined benefit pension plans and other benefits recognized in the three and nine months ended September 30, 2019 and 2018 included the following components:
 
For the three months ended September 30
 
Pensions
 
Other benefits
(in millions of Canadian dollars)
2019
2018
 
2019
2018
Current service cost (benefits earned by employees)
$
27

$
30

 
$
3

$
3

Other components of net periodic benefit (recovery) cost:
 
 
 
 
 
Interest cost on benefit obligation
113

110

 
4

5

Expected return on fund assets
(236
)
(239
)
 
—

—

Recognized net actuarial loss
20

29

 
1

—

Amortization of prior service costs
(1
)
(1
)
 
—

—

Total other components of net periodic benefit (recovery) cost
(104
)
(101
)
 
5

5

Net periodic benefit (recovery) cost
$
(77
)
$
(71
)
 
$
8

$
8



 
For the nine months ended September 30
 
Pensions
 
Other benefits
(in millions of Canadian dollars)
2019
2018
 
2019
2018
Current service cost (benefits earned by employees)
$
81

$
90

 
$
9

$
9

Other components of net periodic benefit (recovery) cost:
 
 
 
 
 
Interest cost on benefit obligation
338

329

 
14

14

Expected return on fund assets
(710
)
(716
)
 
—

—

Recognized net actuarial loss
61

86

 
3

2

Amortization of prior service costs
(1
)
(2
)
 
1

—

Total other components of net periodic benefit (recovery) cost
(312
)
(303
)
 
18

16

Net periodic benefit (recovery) cost
$
(231
)
$
(213
)
 
$
27

$
25