Quarterly Financial Data (Details) - USD ($) $ / shares in Units, shares in Millions	3 Months Ended																					6 Months Ended		12 Months Ended
	Dec. 31, 2017		Sep. 30, 2017		Jul. 01, 2017		Apr. 01, 2017		Dec. 31, 2016	Dec. 31, 2016		Oct. 01, 2016		Jul. 02, 2016		Apr. 02, 2016		Dec. 31, 2015		Sep. 26, 2015		Dec. 31, 2015	Dec. 27, 2014	Dec. 31, 2017	Dec. 31, 2016	Jun. 27, 2015
Quarterly Financial Data [Line Items]
Net sales	$ 1,283,000,000	[1]	$ 1,231,300,000	[2]	$ 1,237,900,000	[3]	$ 1,194,000,000	[4]		$ 1,331,200,000	[5]	$ 1,261,600,000	[6]	$ 1,340,500,000	[7]	$ 1,347,300,000	[8]	$ 1,359,100,000	[9]	$ 1,273,100,000	[10]	$ 2,632,200,000	$ 1,844,700,000	$ 4,946,200,000	$ 5,280,600,000	$ 4,227,100,000
Gross profit	512,700,000	[1]	497,800,000	[2]	504,600,000	[3]	464,400,000	[4]		487,700,000	[5]	484,500,000	[6]	546,500,000	[7]	533,100,000	[8]	543,700,000	[9]	535,200,000	[10]	1,078,900,000	673,800,000	1,979,500,000	2,051,800,000	1,644,200,000
Change in financial assets	700,000	[1]	2,600,000	[2]	38,700,000	[3]	(17,100,000)	[4]	$ 1,100,000,000	1,115,600,000	[5]	377,400,000	[6]	910,800,000	[7]	204,400,000	[8]	116,600,000	[9]	(173,800,000)	[10]	(57,300,000)	(46,900,000)	24,900,000	2,608,200,000	(78,500,000)
Net income (loss)	$ 73,100,000	[1]	$ 44,500,000	[2]	$ (69,600,000)	[3]	$ 71,600,000	[4]		$ (1,359,100,000)	[5]	$ (1,590,200,000)	[6]	$ (534,300,000)	[7]	$ (529,200,000)	[8]	$ (218,400,000)	[9]	$ 260,900,000	[10]	$ 42,500,000	$ 180,600,000	$ 119,600,000	$ (4,012,800,000)	$ 136,100,000
Earnings (loss) per share
Basic (in dollars per share)	$ 0.52	[1],[11]	$ 0.31	[2],[11]	$ (0.49)	[3],[11]	$ 0.50	[4],[11]		$ (9.48)	[5],[11]	$ (11.10)	[6],[11]	$ (3.73)	[7],[11]	$ (3.70)	[8],[11]	$ (1.51)	[9],[11]	$ 1.78	[10],[11]	$ 0.29	$ 1.34	$ 0.84	$ (28.01)	$ 0.97
Diluted (in dollars per share)	$ 0.52	[1],[11]	$ 0.31	[2],[11]	$ (0.49)	[3],[11]	$ 0.50	[4],[11]		$ (9.48)	[5],[11]	$ (11.10)	[6],[11]	$ (3.73)	[7],[11]	$ (3.70)	[8],[11]	$ (1.51)	[9],[11]	$ 1.78	[10],[11]	$ 0.29	$ 1.34	$ 0.84	$ (28.01)	$ 0.97
Weighted-average shares outstanding
Basic (in shares)	140.8	[1],[11]	141.3	[2],[11]	143.3	[3],[11]	143.4	[4],[11]		143.4	[5],[11]	143.3	[6],[11]	143.2	[7],[11]	143.2	[8],[11]	144.9	[9],[11]	146.3	[10],[11]	145.6	135.1	142.3	143.3	139.3
Diluted (in shares)	141.2	[1],[11]	141.7	[2],[11]	143.3	[3],[11]	143.6	[4],[11]		143.4	[5],[11]	143.3	[6],[11]	143.2	[7],[11]	143.2	[8],[11]	144.9	[9],[11]	146.9	[10],[11]	146.1	135.6	142.6	143.3	139.8
Selected Quarterly Financial Information [Abstract]
Impairment of intangible assets, indefinite-lived							$ 12,200,000															$ 185,100,000		$ 12,700,000	$ 849,500,000
Gain (loss) on disposition of business							21,800,000
Restructuring							$ 38,700,000											$ 24,700,000				26,900,000	$ 4,200,000	61,000,000	31,000,000	$ 5,100,000
Impairment of intangible assets					$ 18,500,000					$ 378,600,000		$ 866,600,000				$ 273,300,000		185,100,000								0
Goodwill impairment charge										224,100,000		737,900				$ 130,500,000						0			1,092,500,000
Loss on extinguishment of debt					$ 135,200,000																	900,000	$ 9,600,000	$ 135,200,000	1,100,000	$ 10,500,000
Held-for-sale impairment charges			$ 3,300,000							$ 4,500,000		$ 10,200,000		$ 10,500,000
Fixed asset impairment			$ 4,000,000
Legal fee charge (reversal)																		71,300,000		$ 15,600,000
Gain (loss) related to litigation settlement	$ 200,000
Other than temporary impairment losses, investments, portion recognized in earnings, net, available-for-sale securities																		10,700,000				$ 10,700,000			$ 1,800,000
Held for sale | API
Selected Quarterly Financial Information [Abstract]
Held-for-sale impairment charges																		$ 29,000,000

[1] (5) Includes unusual litigation charge reversal of $0.2 million.Year Ended December 31, 2016FirstQuarter (2) SecondQuarter (3) ThirdQuarter (4) FourthQuarter (5)Net sales$1,347.3 $1,340.5 $1,261.6 $1,331.2Gross profit$533.1 $546.5 $484.5 $487.7Change in financial assets$204.4 $910.8 $377.4 $1,115.6Net loss$(529.2) $(534.3) $(1,590.2) $(1,359.1)Loss per share(1): Basic$(3.70) $(3.73) $(11.10) $(9.48)Diluted$(3.70) $(3.73) $(11.10) $(9.48)Weighted average shares outstanding Basic143.2 143.2 143.3 143.4Diluted143.2 143.2 143.3 143.4

[2] Includes held-for-sale impairment charges of $3.3 million, and fixed asset impairment charges of $4.0 million.

[3] Includes intangible asset impairment charges of $18.5 million, changes in financial assets of $38.7 million, and loss on early debt extinguishment of $135.2 million.

[4] Includes IPR&D impairment charges of $12.2 million, gain on certain divestiture of $21.8 million, and restructuring charges of $38.7 million.

[5] Includes intangible asset impairment charges of $378.6 million, goodwill impairment charge of $224.1 million, and a reduction in held-for-sale impairment charges of $4.5 million.

[6] Includes intangible asset impairment charges of $866.6 million, goodwill impairment charge of $737.9 thousand, and held-for-sale impairment charges of $10.2 million.

[7] Includes held-for-sale impairment charges of $10.5 million and change in financial assets of $910.8 million.

[8] Includes an intangible asset impairment charges of $273.3 million, and a goodwill impairment charge of $130.5 million.

[9] Includes an intangible asset impairment charge of $185.1 million, Mylan defense-related fees of $71.3 million, an impairment charge on our India API held for sale assets of $29.0 million, restructuring charges of $24.7 million, and an investment impairment charge of $10.7 million.

[10] Includes Mylan defense-related fees of $15.6 million.

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