Condensed Consolidated and Combined Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 27, 2013	Dec. 28, 2012
Income Statement [Abstract]
Net sales	$ 540.2	$ 504.0
Cost of sales	284.6	270.5
Gross profit	255.6	233.5
Selling, general and administrative expenses	146.2	146.8
Research and development expenses	39.0	38.4
Separation costs	2.2	12.0
Restructuring charges, net	8.0	0.2
Gains on divestiture and license	(12.9)	(0.7)
Operating income	73.1	36.8
Interest expense	(9.8)	(0.1)
Interest income	0.3	0
Other (expense) income, net	(0.6)	0.2
Income from continuing operations before income taxes	63.0	36.9
Provision for income taxes	16.6	17.1
Income from continuing operations	46.4	19.8
Loss from discontinued operations, net of income taxes	(0.8)	(0.6)
Net income	$ 45.6	$ 19.2
Basic earnings (loss) per share (Note 7):
Income from continuing operations (in usd per share)	$ 0.80	$ 0.34
Loss from discontinued operations (in usd per share)	$ (0.01)	$ (0.01)
Net income (in usd per share)	$ 0.79	$ 0.33
Basic weighted-averaged shares outstanding (in shares)	57.8	57.7
Diluted earnings (loss) per share (Note 7):
Income from continuing operations (in usd per share)	$ 0.79	$ 0.34
Loss from discontinued operations (in usd per share)	$ (0.01)	$ (0.01)
Net income (in usd per share)	$ 0.78	$ 0.33
Diluted weighted-average shares outstanding (in shares)	58.4	57.7