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Employee Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2018
Compensation And Retirement Disclosure [Abstract]  
Summary of Components of Net Periodic Benefit Cost for Pension Benefits

The following table summarizes the components of net periodic benefit cost for the Company’s pension benefits:

 

 

Three Months Ended September 30,

 

 

Nine Months Ended September 30,

 

(in millions)

 

2018

 

 

2017

 

 

2018

 

 

2017

 

Service cost

 

$

10

 

 

$

10

 

 

$

30

 

 

$

29

 

Interest cost

 

 

5

 

 

 

6

 

 

 

15

 

 

 

16

 

Expected return on plan assets

 

 

(11

)

 

 

(10

)

 

 

(33

)

 

 

(29

)

Amortization of actuarial losses

 

 

—

 

 

 

1

 

 

 

—

 

 

 

1

 

Curtailments

 

 

(1

)

 

 

—

 

 

 

(1

)

 

 

—

 

 

 

$

3

 

 

$

7

 

 

$

11

 

 

$

17