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Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2020
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
 
 
 
(In millions)
2020
 
2019
Net periodic pension cost (benefit)
 
 
 
Interest cost on projected benefit obligation
$
20

 
$
25

Expected return on plan assets
(39
)
 
(36
)
Amortization of net actuarial (gain) loss
11

 
10

Settlement loss
1

 
—

Total net periodic pension cost (benefit)
$
(7
)
 
$
(1
)