Employee Stock Plans - Activity for Restricted Stock Restricted Stock Units and Performance Units (Detail) shares in Millions	12 Months Ended
	Oct. 02, 2020 $ / shares shares
Number of Shares
Beginning balance (in shares) | shares	0.7
Granted (in shares) | shares	0.4
Vested (in shares) | shares	(0.3)
Cancelled or expired (in shares) | shares	(0.1)
Ending balance (in shares) | shares	0.7
Weighted Average Grant-Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 108.35
Granted (in dollars per share) | $ / shares	146.03
Vested (in dollars per share) | $ / shares	99.00
Canceled or expired (in dollars per share) | $ / shares	124.71
Ending balance (in dollars per share) | $ / shares	$ 133.82