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Contingencies (Tables)
 9 Months Ended
Jun. 30, 2015
Loss Contingencies [Line Items]  
Schedule of Environmental Loss Contingencies by Site
The following are the components of the Superfund and non-Superfund environmental reserves (in millions):
 
Superfund Sites
 
Non-Superfund Sites
 
Total
Beginning balance at September 30, 2014
$
2

 
$
17

 
$
19

Payments and other
—

 
(4
)
 
(4
)
Accruals
—

 
2

 
2

Balance at June 30, 2015
$
2

 
$
15

 
$
17
Maremont Asbestos  
Loss Contingencies [Line Items]  
Asbestos Related Reserves and Recoveries
Maremont’s asbestos-related reserves and corresponding asbestos-related recoveries are summarized as follows (in millions):
 
June 30,
2015
 
September 30,
2014
Pending and future claims
$
73

 
$
73

Billed but unpaid claims
2

 
3

Asbestos-related liabilities
$
75

 
$
76

Asbestos-related insurance recoveries
$
43

 
$
49
Rockwell Asbestos  
Loss Contingencies [Line Items]  
Asbestos Related Reserves and Recoveries
The Rockwell legacy asbestos-related reserves and corresponding asbestos-related recoveries are summarized as follows (in millions):
 
June 30,
2015
 
September 30,
2014
Pending and future claims
$
48

 
$
48

Billed but unpaid claims
2

 
2

Asbestos-related liabilities
$
50

 
$
50

Asbestos-related insurance recoveries
$
11

 
$
11