Employee Stock and Benefit Plans (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Sep. 28, 2014
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	$ 86.2	$ 70.9	$ 73.0
Stock Options and Restricted Stock Units [Member]
Common stock available for issuance	86.7
Employee Stock [Member]
Common stock available for issuance	13.9
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 9 months 18 days
Total intrinsic value of stock options exercised	$ 254.0	358.0	258.0
Total fair value of options vested	37.0	$ 36.0	$ 44.0
Restricted Stock Units (RSUs) [Member]
Total unrecognized stock-based compensation expense, net of estimated forfeitures	$ 116.0
Weighted average recognition period for total unrecognized stock-based compensation expense (in years)	2 years
Granted, weighted average grant date fair value per share	$ 58.81	$ 38.56	$ 40.07
Total fair value of RSUs vested	$ 169.0	$ 137.0	$ 103.0
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