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Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2013
Commitments and Contingencies Disclosure [Abstract]  
Changes in warranty liability
Changes in the Company’s warranty liability during the three and six months ended March 31, 2013 and 2012 were as follows:
 
 
Three Months Ended
March 31,
 
Six Months Ended
March 31,
 
 
2013
 
2012
 
2013
 
2012
 
 
(In millions)
Warranty liability, beginning of period
 
$
56.6

 
$
46.0

 
$
56.8

 
$
46.2

Warranties issued
 
6.1

 
4.3

 
11.6

 
8.3

Changes in liability for pre-existing warranties
 
1.6

 
1.5

 
5.2

 
3.4

Settlements made
 
(7.0
)
 
(2.9
)
 
(16.3
)
 
(9.0
)
Warranty liability, end of period
 
$
57.3

 
$
48.9

 
$
57.3

 
$
48.9
Rollforward of the reserve of legal claims
Following is a rollforward of the balance of the reserves for the six months ended March 31, 2013:
 
Six Months Ended
 
March 31, 2013
 
(In millions)
Reserves for legal claims, beginning of period
$
544.9

Payments
(13.2
)
Decrease in reserves
(12.0
)
Reserves for legal claims, end of period
$
519.7