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Pension and Other Postretirement Benefits
 3 Months Ended
Mar. 30, 2018
Retirement Benefits [Abstract]  
Pension and Other Postretirement Benefits
. Pension and Other Postretirement Benefits
The following table summarizes the components of net periodic benefit cost for the Company’s pension and other postretirement benefit plans.
 
Pension Plans
 
Postretirement Benefit Plans
 
First Quarter Ended
 
First Quarter Ended
 
March 30,
2018
 
March 31,
2017
 
March 30,
2018
 
March 31,
2017
 
(in millions)
Components of net periodic benefit cost:
 

 
 

 
 

 
 

Service cost
$
26

 
$
25

 
$
—

 
$
1

Interest cost
36

 
35

 
1

 
1

Expected return on plan assets
(56
)
 
(49
)
 
(1
)
 
(1
)
Amortization of net loss (gains)
19

 
16

 
(1
)
 
(1
)
Net periodic benefit cost
$
25


$
27


$
(1
)

$
—

The components of net periodic benefit cost other than the service cost component are included in interest and other income, net, in the unaudited condensed consolidated statements of operations. Service cost is included in operating costs and expenses in the unaudited condensed consolidated statements of operations.
Contributions. The Company contributed cash of $3 million to its pension plans and $1 million to its other postretirement benefit plans during the quarterly period ended March 30, 2018. The Company expects to contribute an additional $97 million to its pension plans and $9 million to its other postretirement benefit plans during the remainder of 2018.