Condensed Consolidated and Combined Statements of Income (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
Income Statement [Abstract]
Net sales	$ 557.8	$ 585.3	$ 1,098.0	$ 1,089.3
Cost of sales	295.2	311.8	579.8	582.3
Gross profit	262.6	273.5	518.2	507.0
Selling, general and administrative expenses	194.1	160.7	340.3	307.5
Research and development expenses	41.4	39.2	80.4	77.6
Separation costs	2.6	14.4	4.8	26.4
Restructuring charges, net	21.7	6.4	29.7	6.6
Gains on divestiture and license	(0.9)	(0.7)	(13.8)	(1.4)
Operating income	3.7	53.5	76.8	90.3
Interest expense	(12.4)	(0.1)	(22.2)	(0.2)
Interest income	0.5	0.1	0.8	0.1
Other (expense) income, net	(0.4)	0	(1.0)	0.2
(Loss) income from continuing operations before income taxes	(8.6)	53.5	54.4	90.4
Provision for income taxes	(20.3)	19.0	(3.7)	36.1
Income from continuing operations	11.7	34.5	58.1	54.3
Loss from discontinued operations, net of income taxes	(0.1)	(0.5)	(0.9)	(1.1)
Net income	$ 11.6	$ 34.0	$ 57.2	$ 53.2
Basic earnings (loss) per share (Note 7):
Income from continuing operations (in usd per share)	$ 0.20	$ 0.60	$ 1.00	$ 0.94
Loss from discontinued operations (in usd per share)	$ 0.00	$ (0.01)	$ (0.02)	$ (0.02)
Net income (in usd per share)	$ 0.20	$ 0.59	$ 0.99	$ 0.92
Basic weighted-averaged shares outstanding (in shares)	58.2	57.7	58.0	57.7
Diluted earnings (loss) per share (Note 7):
Income from continuing operations (in usd per share)	$ 0.20	$ 0.60	$ 0.99	$ 0.94
Loss from discontinued operations (in usd per share)	$ 0.00	$ (0.01)	$ (0.02)	$ (0.02)
Net income (in usd per share)	$ 0.20	$ 0.59	$ 0.97	$ 0.92
Diluted weighted-average shares outstanding (in shares)	59.1	57.7	58.7	57.7