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Pension Plan and Other Postretirement Benefits (Tables)
 6 Months Ended
Jun. 30, 2019
Retirement Benefits [Abstract]  
Pension and Other Postretirement Benefit Costs

The Company maintains defined pension and other postretirement benefit plans, which cover substantially all of the Company’s employees.  Net periodic pension costs include the following components for the three and six months ended June 30, 2019 and 2018:

 
 
Pension Benefits

Consolidated Statements of
Operations Classification of
Net Periodic Benefit Cost
 
For the three months ended June 30,
 
For the six months ended June 30,
(in millions)
 
2019
 
2018
 
2019
 
2018
Service cost
General and administrative expenses
 
$
2

 
$
3

 
$
4

 
$
6

Interest cost
Other Income (Loss), Net
 
1

 
1

 
2

 
3

Expected return on plan assets
Other Income (Loss), Net
 
(1
)
 
(2
)
 
(3
)
 
(4
)
Amortization of prior service cost
Other Income (Loss), Net
 
—

 
—

 
—

 
—

Amortization of net loss
Other Income (Loss), Net
 
—

 
—

 
1

 
—

Settlement loss
Other Income (Loss), Net
 
4

 
—

 
4

 
—

Net periodic benefit cost
 
 
$
6

 
$
2

 
$
8

 
$
5