OTHER FINANCIAL INFORMATION - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Jun. 28, 2019	Sep. 28, 2018		Jun. 29, 2018	Sep. 29, 2017
Other Financial Information [Abstract]
Cash and cash equivalents	$ 520.7	$ 504.8	[1]
Restricted cash - current (1)	13.7	3.1
Restricted cash - long-term (2)	8.5	8.5
Total cash, cash equivalents, and restricted cash	$ 542.9	$ 516.4		$ 545.1	$ 718.5

[1] The condensed consolidated balance sheet as of September 28, 2018, 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.