BALANCE SHEET COMPONENTS - Components of Inventories (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Sep. 30, 2016
Balance Sheet Components [Abstract]
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	[1]

[1] The condensed consolidated balance sheet as of September 30, 2016 was derived from audited financial statements as of that date, but does not include all disclosures required by accounting principles generally accepted in the United States of America.