Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended																12 Months Ended
	Sep. 28, 2018		Jun. 29, 2018		Mar. 30, 2018		Dec. 29, 2017		Sep. 29, 2017		Jun. 30, 2017		Mar. 31, 2017		Dec. 30, 2016		Sep. 28, 2018		Sep. 29, 2017		Sep. 30, 2016
Selected Quarterly Financial Information [Abstract]
Net revenue	$ 1,008.4		$ 894.3		$ 913.4		$ 1,051.9		$ 984.6		$ 900.8		$ 851.7		$ 914.3		$ 3,868.0		$ 3,651.4		$ 3,289.0
Gross Profit	503.6		451.6		458.7		536.8		498.9		453.6		425.4		463.9		1,950.7		1,841.8		1,665.2
Net income	$ 285.5		$ 286.5		$ 276.0		$ 70.4		$ 281.3		$ 246.2		$ 224.9		$ 257.8		$ 918.4		$ 1,010.2		$ 995.2
Net income, basic (in dollars per share)	$ 1.60	[1]	$ 1.58	[1]	$ 1.51	[1]	$ 0.38	[1]	$ 1.53	[1]	$ 1.34	[1]	$ 1.22	[1]	$ 1.39	[1]	$ 5.06	[1]	$ 5.48	[1]	$ 5.27
Net income, diluted (in dollars per share)	$ 1.58	[1]	$ 1.57	[1]	$ 1.50	[1]	$ 0.38	[1]	$ 1.51	[1]	$ 1.32	[1]	$ 1.20	[1]	$ 1.38	[1]	$ 5.01	[1]	$ 5.41	[1]	$ 5.18

[1] Earnings per share calculations for each of the quarters are based on the weighted average number of shares outstanding and included common stock equivalents in each period. Therefore, the sums of the quarters do not necessarily equal the full year earnings per share.