Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Sep. 30, 2012
Accounting Policies [Abstract]  
Property
Property consisted of: 
 
September 30,
 
2012
 
2011
 
 
 
 
Land
$
13.0

 
$
12.2

Buildings and leasehold improvements
135.3

 
131.3

Machinery and equipment
410.3

 
395.3

Software
21.9

 
—

Construction in progress
19.0

 
6.3

 
599.5

 
545.1

Accumulated depreciation
(194.4
)
 
(133.0
)
 
$
405.1

 
$
412.1

The $21.9 increase in software assets is primarily related to certain internally developed administrative software and software licenses which were transferred to Post from Ralcorp in connection with the Spin-Off.
Other intangible assets
Other intangible assets consisted of: 
 
September 30, 2012
 
September 30, 2011
 
Carrying
Amount
 
Accum.
Amort.
 
Net
Amount
 
Carrying
Amount
 
Accum.
Amort.
 
Net
Amount
Subject to amortization:
 
 
 
 
 
 
 
 
 
 
 
Customer relationships
$
153.9

 
$
(32.1
)
 
$
121.8

 
$
153.9

 
$
(24.4
)
 
$
129.5

Trademarks/brands
91.0

 
(20.4
)
 
70.6

 
91.0

 
(15.5
)
 
75.5

 
$
244.9

 
$
(52.5
)
 
$
192.4

 
$
244.9

 
$
(39.9
)
 
$
205.0

Not subject to amortization:


 


 


 


 


 


Trademarks/brands
543.6

 
—

 
543.6

 
543.6

 
—

 
543.6

 
$
788.5

 
$
(52.5
)
 
$
736.0

 
$
788.5

 
$
(39.9
)
 
$
748.6