Taxes on Earnings - Schedule of Effective Income Tax Rate (Detail)	12 Months Ended
	Oct. 02, 2020	Sep. 27, 2019	Sep. 28, 2018
Income Tax Disclosure [Abstract]
Federal statutory income tax rate	21.00%	21.00%	24.60%
Impact of U.S. Tax Reform	0.60%	2.10%	46.30%
State and local taxes, net of federal tax benefit	1.30%	2.60%	0.50%
Non-U.S. income taxed at different rates, net	4.50%	1.50%	(0.60%)
Foreign-derived intangible income deduction	(1.10%)	(1.40%)	0.00%
Resolution of tax contingencies due to expiration of statutes of limitation	(2.30%)	(1.80%)	(2.50%)
Excess stock deduction	(2.10%)	(1.60%)	(1.50%)
Goodwill impairment	0.00%	2.50%	0.00%
Change in acquirer's deferred taxes related to purchase accounting	0.00%	0.70%	(1.80%)
In-process R&D expense	0.00%	1.10%	0.00%
U.S. minimum tax	2.00%	0.40%	0.00%
Other	0.90%	3.50%	1.80%
Effective tax rate	24.80%	30.60%	66.80%