Consolidated Statements Of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 28, 2014	Mar. 29, 2013	Mar. 28, 2014	Mar. 29, 2013
Net revenue	$ 481.0	$ 425.2	$ 986.2	$ 878.9
Cost of goods sold	268.6	248.5	551.8	509.6
Gross profit	212.4	176.7	434.4	369.3
Operating expenses:
Research and development	61.6	56.3	120.0	114.4
Selling, general and administrative	41.9	39.7	83.0	77.8
Amortization of intangibles	6.3	7.2	12.8	15.4
Restructuring and other charges	0	4.8	0	6.4
Total operating expenses	109.8	108.0	215.8	214.0
Operating income	102.6	68.7	218.6	155.3
Other expense, net	(0.1)	(1.4)	(0.1)	(1.1)
Income before income taxes	102.5	67.3	218.5	154.2
Provision for income taxes	25.6	5.6	47.1	26.0
Net income	$ 76.9	$ 61.7	$ 171.4	$ 128.2
Earnings per share:
Basic (in dollars per share)	$ 0.41	$ 0.33	$ 0.92	$ 0.68
Diluted (in dollars per share)	$ 0.40	$ 0.32	$ 0.89	$ 0.66
Weighted average shares:
Basic (in shares)	187.4	188.7	186.8	189.1
Diluted (in shares)	192.2	193.1	191.7	193.6