Employee Stock and Benefit Plans (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions	12 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Sep. 29, 2019
Maximum permitted contribution to Employee Stock Purchase Plan, percent	10.00%
Discounted stock purchase price, percent of market value	95.00%
Number of shares issued under plan	0.5
Matching contributions	$ 145,100,000	$ 132,700,000	$ 122,100,000
Stock Options and Restricted Stock Units [Member]
Common stock available for issuance	41.0
Employee Stock [Member]
Common stock available for issuance	11.3
Stock Options [Member]
Award expiration period (years)	10 years
Total unrecognized stock-based compensation expense, net of estimated forfeitures	$ 100,000
Weighted average recognition period for total unrecognized stock-based compensation expense (in years)	6 months
Total intrinsic value of stock options exercised	$ 219,000,000	236,000,000	466,000,000
Total fair value of options vested	14,000,000	$ 25,000,000	$ 31,000,000
Restricted Stock Units (RSUs) [Member]
Total unrecognized stock-based compensation expense, net of estimated forfeitures	$ 145,000,000
Weighted average recognition period for total unrecognized stock-based compensation expense (in years)	2 years
Granted, weighted average grant date fair value per share	$ 96.05	$ 81.96	$ 68.14
Total fair value of RSUs vested	$ 226,000,000	$ 211,000,000	$ 255,000,000
Director [Member] | Stock Options [Member] | Maximum [Member]
Award vesting period for non-employee directors (years)	1 year