XML 26 R25.htm IDEA: XBRL DOCUMENT v2.4.0.6
Retirement Benefits (Tables)
 3 Months Ended
Mar. 31, 2013
Compensation and Retirement Disclosure [Abstract]  
Components Of Net Periodic Benefit Cost
The following tables provide the components of net periodic benefit cost for the three months ended March 31, 2013 and 2012 (in millions):
 
Pension Benefits
 
Three Months Ended
March 31,
 
2013
 
2012
Components of net periodic benefit cost
 
 
 
Service cost
$
1

 
$
104

Interest cost
163

 
191

Expected return on assets
(180
)
 
(166
)
Amortization of:
 
 
 
    Prior service cost
7

 
4

    Unrecognized net (gain) loss
23

 
61

Net periodic benefit cost
$
14

 
$
194

 
Retiree Medical and Other Benefits
 
Three Months Ended
March 31,
 
2013
 
2012
Components of net periodic benefit cost
 
 
 
Service cost
$
—

 
$
15

Interest cost
13

 
38

Expected return on assets
(4
)
 
(4
)
Amortization of:
 
 
 
Prior service cost
(61
)
 
(7
)
Unrecognized net (gain) loss
(2
)
 
(2
)
Net periodic benefit cost
$
(54
)
 
$
40