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Commitments and Contingencies (Tables)
 12 Months Ended
Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]  
Changes in warranty liability
Changes in the Company’s warranty liability during fiscal 2017 and 2016 were as follows:
 
September 30,
 
2017
 
2016
 
(In millions)
Warranty liability, beginning of year
$
104.4

 
$
82.0

Warranties issued
69.7

 
54.2

Changes in liability for pre-existing warranties
30.0

 
13.9

Settlements made
(60.4
)
 
(45.7
)
Warranty liability, end of year
$
143.7

 
$
104.4
Rollforward of reserves for legal claims
Changes in the Company’s legal claims reserves during fiscal 2017 and 2016 were as follows:
 
September 30,
 
2017
 
2016
 
(In millions)
Reserves for legal claims, beginning of year
$
423.5

 
$
451.0

Increase in reserves
91.0

 
25.4

Payments
(93.9
)
 
(52.9
)
Reserves for legal claims, end of year
$
420.6

 
$
423.5
Minimum annual lease payments
At September 30, 2017, the future minimum annual lease payments under these agreements are as follows (in millions):
2018
$
15.5

2019
9.8

2020
5.7

2021
4.1

2022
2.6

Thereafter
1.1

 
$
38.8