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Postretirement Plans (Tables)
 12 Months Ended
Sep. 30, 2013
Postemployment Benefits [Abstract]  
Components Of Net Postretirement Benefits Expense
 
2011

 
2012

 
2013

Service cost
$
3

 
2

 
2

Interest cost
17

 
16

 
12

Net amortization
(7
)
 
(11
)
 
(13
)
     Net postretirement expense
$
13

 
7

 
1
Reconciliations Of Actuarial Present Value Of Accumulated Postretirement Benefit Obligations
 
2012

 
2013

Benefit obligation, beginning
$
392

 
367

     Service cost
2

 
2

     Interest cost
16

 
12

     Actuarial (gain) loss
(10
)
 
(83
)
     Benefits paid
(17
)
 
(20
)
     Plan amendments
(16
)
 
—

Benefit obligation, ending (recognized in balance sheet)
$
367

 
278