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Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2018
Retirement Benefits [Abstract]  
Components of net periodic cost (benefit)
The components of net periodic pension cost (benefit) are presented in the following table.
Three months ended March 31
Pension Plans
(In millions)
2018
 
2017
Net periodic pension cost (benefit)
 
 
 
Service cost
$
—

 
$
—

Non-service cost:
 
 
 
Interest cost on projected benefit obligation
23

 
26

Expected return on plan assets
(40
)
 
(39
)
Amortization of net actuarial loss
9

 
9

Settlement loss
4

 
2

Total non-service cost
(4
)
 
(2
)
Total net periodic pension cost (benefit)
$
(4
)
 
$
(2
)

For the three months ended March 31, 2018, the Company recognized $1 million of non-service cost in Insurance claims and policyholders' benefits and $3 million of non-service cost in Other operating expenses. For the three months ended March 31, 2017, the Company recognized $1 million of non-service costs in Insurance claims and policyholders' benefits and $1 million of non-service costs in Other operating expenses.