RECEIVABLES - Schedule of Trade and Unbilled Receivables, Net and Notes Receivable (Details) - USD ($) $ in Millions	Jan. 01, 2021	Oct. 02, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade and unbilled receivables, gross	$ 1,189.4	$ 1,198.1
Allowance for credit losses	(61.2)	(58.3)
Trade and unbilled receivables, net	1,128.2	1,139.8
Short-term	1,029.3	1,066.1
Long-term	98.9	73.7
Notes Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Short-term notes receivable	11.8	11.8
Long-term notes receivable	$ 37.5	$ 36.7