Stockholders' Equity (Stock Options) (Details) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Sep. 29, 2017 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Balance outstanding at October 2, 2015 (in shares) | shares	4.8
Granted (in shares) | shares	0.2
Exercised (in shares) | shares	(1.8)
Canceled/forfeited (in shares) | shares	(0.2)
Balance outstanding at September 30, 2016 (in shares) | shares	3.0
Shares exercisable (in shares) | shares	1.4
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Stock options outstanding, weighted average exercise price, beginning balance | $ / shares	$ 41.42
Granted, weighted average exercise price | $ / shares	77.58
Exercised, weighted average exercise price | $ / shares	29.13
Canceled/forfeited, weighted average exercise price | $ / shares	60.60
Stock options outstanding, weighted average exercise price, ending balance | $ / shares	50.36
Weighted average exercise price (in dollars per share) | $ / shares	$ 35.00
Weighted average remaining contractual life, outstanding	3 years 7 months
Weighted average remaining contractual life, exercisable	2 years 7 months
Aggregate intrinsic value | $	$ 152.8
Aggregate intrinsic value | $	$ 95.6