Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jul. 01, 2016	Jul. 03, 2015	Jul. 01, 2016	Jul. 03, 2015
Income Statement [Abstract]
Net revenue	$ 751.7	$ 810.0	$ 2,453.6	$ 2,377.6
Cost of goods sold	373.4	416.9	1,212.8	1,259.3
Gross profit	378.3	393.1	1,240.8	1,118.3
Operating expenses:
Research and development	77.9	76.8	239.2	220.8
Selling, general and administrative	46.9	48.6	142.6	143.9
Amortization of intangibles	10.0	8.4	27.0	25.2
Restructuring and other charges	4.9	0.5	5.2	2.9
Total operating expenses	139.7	134.3	414.0	392.8
Operating income	238.6	258.8	826.8	725.5
Other (expense) income, net	(2.4)	0.6	(5.8)	1.9
Merger termination fee	0.0	0.0	88.5	0.0
Income before income taxes	236.2	259.4	909.5	727.4
Provision for income taxes	51.2	52.0	161.1	158.3
Net income	$ 185.0	$ 207.4	$ 748.4	$ 569.1
Earnings per share:
Basic (in dollars per share)	$ 0.98	$ 1.09	$ 3.94	$ 3.00
Diluted (in dollars per share)	$ 0.97	$ 1.06	$ 3.87	$ 2.92
Weighted average shares:
Basic (in shares)	188.7	190.0	189.8	189.5
Diluted (in shares)	191.7	195.4	193.2	194.9
Cash dividends declared and paid per share (usd per share)	$ 0.26	$ 0.13	$ 0.78	$ 0.39