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Retirement Benefits and Trusteed Assets (Notes)
 3 Months Ended
Mar. 31, 2014
Pension and Other Postretirement Benefit Expense [Abstract]  
Retirement Benefits and Trusted Assets Disclosure [Text Block]
RETIREMENT BENEFITS AND TRUSTEED ASSETS

The following table details the components of net periodic benefit costs for pension benefits and other postretirement benefits:
 
Pension Benefits
 
Other Postretirement Benefits
 
2014
 
2013
 
2014
 
2013
Three Months Ended March 31
(In millions)
Service cost
$
17

 
$
19

 
$
7

 
$
12

Interest cost
40

 
36

 
17

 
18

Expected return on plan assets
(48
)
 
(46
)
 
(21
)
 
(18
)
Amortization of:
 
 
 
 
 
 
 
Net actuarial loss
27

 
36

 
3

 
12

Prior service credit
—

 
—

 
(27
)
 
(17
)
Net periodic benefit cost (credit)
$
36

 
$
45

 
$
(21
)
 
$
7



Pension and Other Postretirement Contributions

During the first three months of 2014, the Company contributed $30 million to its pension plans. At the discretion of management, and depending upon financial market conditions, the Company may make up to an additional $115 million contribution to its pension plans in 2014.

At the discretion of management, the Company may make up to a $120 million contribution to its other postretirement benefit plans in 2014.