Employee Stock and Benefit Plans (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Sep. 27, 2015
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	$ 101.4	$ 86.2	$ 70.9
Stock Options and Restricted Stock Units [Member]
Common stock available for issuance	73.5
Employee Stock [Member]
Common stock available for issuance	13.3
Stock Options [Member]
Award expiration period (years)	10 years
Total unrecognized stock-based compensation expense, net of estimated forfeitures	$ 38.0
Weighted average recognition period for total unrecognized stock-based compensation expense (in years)	2 years 8 months 12 days
Total intrinsic value of stock options exercised	$ 181.0	254.0	358.0
Total fair value of options vested	40.0	$ 37.0	$ 36.0
Restricted Stock Units (RSUs) [Member]
Total unrecognized stock-based compensation expense, net of estimated forfeitures	$ 75.0
Weighted average recognition period for total unrecognized stock-based compensation expense (in years)	2 years
Granted, weighted average grant date fair value per share	$ 54,300,000.00	$ 58.81	$ 38.56
Total fair value of RSUs vested	$ 182.0	$ 169.0	$ 137.0
Director [Member] | Stock Options [Member] | Minimum [Member]
Award vesting period for non-employee directors (years)	1 year
Director [Member] | Stock Options [Member] | Maximum [Member]
Award vesting period for non-employee directors (years)	3 years