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Shareowners Equity (Tables)
 12 Months Ended
Sep. 30, 2012
Equity [Abstract]  
Changes in outstanding common shares
Changes in outstanding common shares are summarized as follows (in millions):
 
 
2012
 
2011
 
2010
Beginning balance
 
141.9

 
141.7

 
142.1

Treasury stock purchases
 
(3.7
)
 
(4.0
)
 
(2.2
)
Shares delivered under incentive plans
 
1.6

 
4.2

 
1.8

Ending balance
 
139.8

 
141.9

 
141.7
Accumulated other comprehensive loss
Accumulated other comprehensive loss consists of (in millions):
 
 
September 30,
 
 
2012
 
2011
Pension and other postretirement benefit plan adjustments (Note 12)
 
$
(1,226.0
)
 
$
(1,033.6
)
Accumulated currency translation adjustments
 
0.5

 
35.5

Net unrealized gains on cash flow hedges
 
0.2

 
5.2

Accumulated other comprehensive loss
 
$
(1,225.3
)
 
$
(992.9
)