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Pension And Postretirement Plan Expenses
3 Months Ended
Dec. 31, 2012
Pension And Postretirement Plan Expenses [Abstract]  
Pension And Postretirement Plan Expenses
Total periodic pension and postretirement expense is summarized below (in millions):
 
Three Months Ended December 31,
 
2011

 
2012

Service cost
$
22

 
26

Interest cost
60

 
56

Expected return on plan assets
(80
)
 
(83
)
Net amortization
43

 
58

Total
$
45

 
57