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BALANCE SHEET COMPONENTS (Tables)
6 Months Ended
Mar. 31, 2017
Balance Sheet Components [Abstract]  
Available-for-sale Securities:
The following tables summarize the Company's available-for-sale securities:
 
March 31, 2017
(In millions)
Amortized Cost
 
Gross Unrealized Gains
 
Gross Unrealized Losses
 
Fair Value
Corporate debt securities:
 
 
 
 
 
 
 
Original CPTC loans
$
60.5

 
$

 
$

 
$
60.5

   Total available-for-sale securities
$
60.5

 
$

 
$

 
$
60.5


 
September 30, 2016
(In millions)
Amortized Cost
 
Gross Unrealized Gains
 
Gross Unrealized Losses
 
Fair Value
Corporate debt securities:
 
 
 
 
 
 
 
Original CPTC loans
$
95.3

 
$

 
$

 
$
95.3

   Total available-for-sale securities
$
95.3

 
$

 
$

 
$
95.3

Inventories:
The following table summarizes the Company's inventories:
(In millions)
March 31,
2017
 
September 30,
2016
Raw materials and parts
$
267.8

 
$
257.9

Work-in-process
84.2

 
69.6

Finished goods
101.7

 
114.9

Total inventories
$
453.7

 
$
442.4

Other long-term liabilities:
The following table summarizes the Company's other long-term liabilities:
(In millions)
March 31,
2017
 
September 30,
2016
Long-term income taxes payable
$
47.1

 
$
44.5

Deferred income taxes
17.9

 
24.5

Other
78.6

 
86.8

Total other long-term liabilities
$
143.6

 
$
155.8