Quarterly Financial Data (unaudited) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended																12 Months Ended
	Dec. 31, 2018		Sep. 29, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017		Sep. 30, 2017		Jul. 01, 2017		Apr. 01, 2017		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Quarterly Financial Data [Abstract]
Net sales	$ 1,195.2		$ 1,133.1	[1]	$ 1,186.4	[2]	$ 1,217.0		$ 1,283.0		$ 1,231.3	[3]	$ 1,237.9	[4]	$ 1,194.0	[5]	$ 4,731.7	[6]	$ 4,946.2	[6]	$ 5,280.6	[6]
Gross profit	443.0		424.8	[1]	471.0	[2]	492.7		512.7		497.8	[3]	504.6	[4]	464.4	[5]	1,831.5		1,979.5		2,051.8
Change in financial assets	(122.8)		(74.9)	[1]	(0.6)	[2]	9.6		0.7		2.6	[3]	38.7	[4]	(17.1)	[5]	(188.7)		24.9		2,608.2
Net income	$ 81.5		$ (67.5)	[1]	$ 36.2	[2]	$ 80.8		$ 73.1		$ 44.5	[3]	$ (69.6)	[4]	$ 71.6	[5]	$ 131.0		$ 119.6		$ (4,012.8)
Earnings (loss) per share
Basic (in dollars per share)	$ 0.60	[7]	$ (0.49)	[1],[7]	$ 0.26	[2],[7]	$ 0.57	[7]	$ 0.52	[8]	$ 0.31	[3],[8]	$ (0.49)	[4],[8]	$ 0.50	[5],[8]	$ 0.95		$ 0.84		$ (28.01)
Diluted (in dollars per share)	$ 0.60	[7]	$ (0.49)	[1],[7]	$ 0.26	[2],[7]	$ 0.57	[7]	$ 0.52	[8]	$ 0.31	[3],[8]	$ (0.49)	[4],[8]	$ 0.50	[5],[8]	$ 0.95		$ 0.84		$ (28.01)
Weighted-average shares outstanding
Basic (in shares)	135.9		137.4	[1]	138.1	[2]	140.8		140.8		141.3	[3]	143.3	[4]	143.4	[5]	137.8		142.3		143.3
Diluted (in shares)	136.3		137.4	[1]	138.7	[2]	141.4		141.2		141.7	[3]	143.3	[4]	143.6	[5]	138.3		142.6		143.3
Selected Quarterly Financial Information [Abstract]
Acquisition related costs and contingent consideration adjustments					$ 53.2
Impairment charges			$ 221.8														$ 224.4		$ 47.5		$ 2,631.0
Restructuring			$ 18.0												$ 38.7		21.0		61.0		31.0
Impairment of intangible assets, indefinite-lived															12.2
Gain (loss) on disposition of business															$ (21.8)
Impairment of intangible assets													$ 18.5
Loss on extinguishment of debt							$ 0.5						$ 135.2				$ 0.5		$ 135.2		$ 1.1
Held-for-sale impairment charges											$ 3.3
Fixed asset impairment											$ 4.0

[1] Includes of $221.8 million and of $18.0 million

[2] Includes of $53.2 million.

[3] Includes of $3.3 million, and of $4.0 million.

[4] Includes of $18.5 million, and of $135.2 million.

[5] Includes of $12.2 million, of $21.8 million, and restructuring expense of $38.7 million.

[6] (1)    The net sales by geography is derived from the location of the entity that sells to a third party.

[7] The sum of individual per share amounts may not equal due to rounding.

[8] The sum of individual per share amounts may not equal due to rounding.