Taxes on Earnings - Schedule of Taxes on Earnings (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 02, 2020	Sep. 27, 2019	Sep. 28, 2018
Current provision:
Federal	$ 4.7	$ 39.0	$ 188.3
State and local	(0.5)	5.2	8.0
Foreign	57.5	69.3	47.9
Total current	61.7	113.5	244.2
Deferred provision (benefit):
Federal	18.2	4.0	43.7
State and local	0.6	2.8	(3.3)
Foreign	8.4	8.3	17.2
Total deferred	27.2	15.1	57.6
Taxes on earnings	$ 88.9	$ 128.6	$ 301.8