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Commitments and Contingencies (Tables)
 9 Months Ended
Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]  
Changes in warranty liability
Changes in the Company’s warranty liability during the three and nine months ended June 30, 2017 and 2016 were as follows:

 
 
Three Months Ended 
 June 30,
 
Nine Months Ended 
 June 30,
 
 
2017
 
2016
 
2017
 
2016
 
 
(In millions)
Warranty liability, beginning of period
 
$
112.8

 
$
87.9

 
$
104.4

 
$
82.0

Warranties issued
 
17.6

 
14.3

 
45.9

 
37.2

Changes in liability for pre-existing warranties
 
8.2

 
2.4

 
14.5

 
5.6

Settlements made
 
(18.3
)
 
(10.9
)
 
(44.5
)
 
(31.1
)
Warranty liability, end of period
 
$
120.3

 
$
93.7

 
$
120.3

 
$
93.7
Changes in legal claims reserves
Changes in the Company’s legal claims reserves during the nine months ended June 30, 2017 and 2016 were as follows:
 
Nine Months Ended 
 June 30,
 
2017
 
2016
 
(In millions)
Reserves for legal claims, beginning of period
$
423.5

 
$
451.0

Increase in reserves
86.2

 
15.2

Payments
(56.2
)
 
(39.8
)
Reserves for legal claims, end of period
$
453.5

 
$
426.4