CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jan. 01, 2021	Oct. 02, 2020
Statement of Financial Position [Abstract]
Trade and unbilled receivables, allowance for credit loss, current	$ 55.2	$ 52.3
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	1,000,000.0	1,000,000.0
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	189,000,000.0	189,000,000.0
Common stock, shares issued (in shares)	91,800,000	91,200,000
Common stock, shares outstanding (in shares)	91,800,000	91,200,000