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Pension Plan And Other Postretirement Benefits (Tables)
 6 Months Ended
Jun. 30, 2015
Pension Plan And Other Postretirement Benefits [Abstract]  
Pension And Other Postretirement Benefit Costs

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pension Benefits

 

 

For the three months ended

 

For the six months ended

 

 

June 30,

 

June 30,

 

 

2015

 

2014

 

2015

 

2014

 

 

(in millions)

 

 

 

 

 

 

 

 

 

 

 

 

 

Service cost

 

$
4 

 

$
3 

 

$
8 

 

$
7 

Interest cost

 

 
2 

 

 
2 

 

 
3 

 

 
3 

Expected return on plan assets

 

 
(2)

 

 
(2)

 

 
(4)

 

 
(4)

Amortization of prior service cost

 

 

– 

 

 

–  

 

 

– 

 

 

– 

Amortization of net loss

 

 

– 

 

 

–  

 

 
1 

 

 

– 

 

 

 

 

 

 

 

 

 

 

 

 

 

Net periodic benefit cost

 

$
4 

 

$
3 

 

$
8 

 

$
6