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Benefit Plans
 6 Months Ended
Jun. 30, 2019
Retirement Benefits [Abstract]  
Benefit Plans
10. Benefit Plans
The Company and its subsidiaries have several
non-contributory
defined benefit plans and postretirement benefit plans covering eligible employees and retirees.
The following table presents the components of net periodic (benefit) cost for the plans:
                                 
 
Pension Benefits
 
 
Three Months Ended
 
 
Six Months Ended
 
 
June 30,
 
 
June 30,
 
 
2019
 
 
2018
 
 
2019
 
 
2018
 
(In millions)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Service cost
 
$
1
 
 
$
2
 
 
$
3
 
 
$
4
 
Interest cost
 
 
30
 
 
 
28
 
 
 
59
 
 
 
55
 
Expected return on plan assets
 
 
(40
) 
 
 
(45
)
 
 
(80
)
 
 
(90
)
Amortization of unrecognized net loss
 
 
12
 
 
 
10
 
 
 
23
 
 
 
21
 
Settlement charge
 
 
2
 
 
 
3
 
 
 
2
 
 
 
7
 
Net periodic (benefit) cost
 
$
5
 
 
$
(2
)
 
$
7
 
 
$
(3
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Other Postretirement Benefits
 
 
Three Months Ended
 
 
Six Months Ended
 
 
June 30,
 
 
June 30,
 
 
2019
 
 
2018
 
 
2019
 
 
2018
 
(In millions)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Interest cost
 
 
 
 
 
 
 
$
1
 
 
$
1
 
Expected return on plan assets
 
$
(1
) 
 
$
(1
)
 
 
(2
)
 
 
(2
)
Amortization of unrecognized prior service benefit
 
 
 
 
 
 
 
 
 
 
 
 
(1
)
Net periodic benefit
 
$
(1
) 
 
$
(1
)
 
$
(1
) 
 
$
(2
)