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Benefit Plans
 9 Months Ended
Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]  
Benefit Plans
Note G. Benefit Plans
The components of net periodic cost (benefit) are presented in the following table.
Periods ended September 30
Three Months
 
Nine Months
(In millions)
2016
 
2015
 
2016
 
2015
Pension cost (benefit)
 
 
 
 
 
 
 
Service cost
$
—

 
$
—

 
$
—

 
$
4

Interest cost on projected benefit obligation
29

 
29

 
85

 
85

Expected return on plan assets
(41
)
 
(44
)
 
(121
)
 
(131
)
Amortization of net actuarial loss
9

 
7

 
28

 
26

Net periodic pension cost (benefit)
$
(3
)
 
$
(8
)
 
$
(8
)
 
$
(16
)