Condensed Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 24, 2016	Jun. 30, 2017	Jun. 24, 2016
Net sales	$ 824.5	$ 866.6	$ 1,635.4	$ 1,682.4
Cost of sales	408.4	377.8	800.7	768.5
Gross profit	416.1	488.8	834.7	913.9
Selling, general and administrative expenses	232.1	224.9	540.2	434.2
Research and development expenses	69.2	74.8	131.4	132.9
Restructuring charges, net	0.6	14.0	17.8	22.4
Non-restructuring impairment charges	0.0	0.0	0.0	16.9
Losses (gains) on divestiture and license	2.1	0.0	(57.0)	0.0
Operating income	112.1	175.1	202.3	307.5
Interest expense	(92.2)	(95.6)	(186.4)	(192.8)
Interest income	0.6	0.4	1.5	0.6
Other income (expense), net	10.0	(1.3)	2.5	(2.0)
Income from continuing operations before income taxes	30.5	78.6	19.9	113.3
Income tax benefit	(40.1)	(98.1)	(79.6)	(161.9)
Income from continuing operations	70.6	176.7	99.5	275.2
(Loss) income from discontinued operations, net of income taxes	(7.8)	22.6	362.5	42.4
Net income	$ 62.8	$ 199.3	$ 462.0	$ 317.6
Basic earnings per share (Note 7):
Income from continuing operations, per share	$ 0.72	$ 1.63	$ 0.99	$ 2.50
(Loss) income from discontinued operations, per share	(0.08)	0.21	3.59	0.39
Net income, per share	$ 0.64	$ 1.84	$ 4.58	$ 2.89
Basic weighted-averaged shares outstanding (in shares)	98.5	108.6	100.9	109.9
Diluted earnings per share (Note 7):
Income from continuing operations, per share	$ 0.72	$ 1.62	$ 0.98	$ 2.48
(Loss) income from discontinued operations, per share	(0.08)	0.21	3.58	0.38
Net income, per share	$ 0.64	$ 1.82	$ 4.57	$ 2.87
Diluted weighted-average shares outstanding (in shares)	98.7	109.4	101.2	110.8