Condensed Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 25, 2020	Sep. 27, 2019	Sep. 25, 2020	Sep. 27, 2019
Net sales (includes refined estimate of the retrospective one-time charge of $0.7 and $535.1 related to the Medicaid lawsuit for the three and nine months ended September 25, 2020, respectively)	$ 698.3	$ 743.7	$ 1,530.6	$ 2,357.6
Cost of sales	403.0	419.4	1,171.7	1,309.3
Gross profit	295.3	324.3	358.9	1,048.3
Selling, general and administrative expenses	220.8	205.7	683.2	661.8
Research and development expenses	65.5	103.1	225.8	268.0
Restructuring charges, net	3.2	7.2	15.8	11.2
Non-restructuring impairment charges	0.0	0.0	63.5	113.5
Gains on divestiture	(9.7)	0.0	(10.1)	0.0
Medicaid lawsuit (Note 11)			640.2
Opioid-related litigation settlement (Note 11)	(25.8)	0.0	(34.1)	0.0
Operating income (loss)	41.5	8.3	(690.3)	(6.2)
Interest expense	(62.2)	(77.6)	(200.9)	(231.8)
Interest income	0.9	2.9	5.4	6.6
Other income, net	0.0	37.9	1.1	128.6
Loss from continuing operations before income taxes	(19.8)	(28.5)	(884.7)	(102.8)
Income tax benefit	(211.6)	(27.6)	(69.2)	(256.6)
Income (loss) from continuing operations	191.8	(0.9)	(815.5)	153.8
(Loss) income from discontinued operations, net of income taxes	(0.2)	(0.2)	23.8	$ 6.8
Net income (loss)	$ 191.6	$ (1.1)	$ (791.7)
Basic earnings (loss) per share (Note 5):
Income (loss) from continuing operations	$ 2.27	$ (0.01)	$ (9.66)	$ 1.84
(Loss) income from discontinued operations	0	0	0.28	0.08
Net income (loss)	$ 2.26	$ (0.01)	$ (9.38)	$ 1.92
Basic weighted-averaged shares outstanding (in shares)	84.6	84.0	84.4	83.8
Diluted earnings (loss) per share (Note 5):
Income (loss) from continuing operations	$ 2.27	$ (0.01)	$ (9.66)	$ 1.83
(Loss) income from discontinued operations	0	0	0.28	0.08
Net income (loss)	$ 2.26	$ (0.01)	$ (9.38)	$ 1.91
Diluted weighted-average shares outstanding (in shares)	84.6	84.0	84.4	84.2
Sales [Member]
Medicaid lawsuit (Note 11)	$ 0.7	$ 0.0	$ 535.1	$ 0.0
Operating Expense [Member]
Medicaid lawsuit (Note 11)	(0.2)	0.0	105.1	0.0
Retained Earnings (Deficit)
Net income (loss)	$ 191.6	$ (1.1)	$ (791.7)	$ 160.6