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Postretirement Plans (Tables)
 12 Months Ended
Sep. 30, 2014
Postemployment Benefits [Abstract]  
Components Of Net Postretirement Benefits Expense
 
2012

 
2013

 
2014

Service cost
$
2

 
2

 
1

Interest cost
16

 
12

 
11

Net amortization
(11
)
 
(13
)
 
(21
)
     Net postretirement expense
$
7

 
1

 
(9
)
Reconciliations Of Actuarial Present Value Of Accumulated Postretirement Benefit Obligations
 
2013

 
2014

Benefit obligation, beginning
$
367

 
278

     Service cost
2

 
1

     Interest cost
12

 
11

     Actuarial (gain) loss
(83
)
 
(12
)
     Benefits paid
(20
)
 
(17
)
     Plan amendments
—

 
(13
)
Benefit obligation, ending (recognized in balance sheet)
$
278

 
248