Segment and Geographic Information (Details) - USD ($) $ in Millions		3 Months Ended													12 Months Ended
		Dec. 31, 2018	Sep. 29, 2018	[1]	Jun. 30, 2018	[2]	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	[3]	Jul. 01, 2017	[4]	Apr. 01, 2017	[5]	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Segment Reporting Information [Line Items]
Net sales		$ 1,195.2	$ 1,133.1		$ 1,186.4		$ 1,217.0	$ 1,283.0	$ 1,231.3		$ 1,237.9		$ 1,194.0		$ 4,731.7	[6]	$ 4,946.2	[6]	$ 5,280.6	[6]
Operating income (loss)															$ 236.5		$ 598.2		$ (1,999.7)
Operating income %															5.00%		12.10%		(37.90%)
Assets		10,983.4						11,628.8							$ 10,983.4		$ 11,628.8		$ 13,870.1
Capital expenditures															102.6		88.6		106.2
Depreciation/amortization															423.6		444.8		457.0
Property, plant and equipment, net		829.1						833.1							829.1		833.1		870.1
Change in financial assets		(122.8)	$ (74.9)		$ (0.6)		$ 9.6	0.7	$ 2.6		$ 38.7		$ (17.1)		(188.7)		24.9		2,608.2
CHCA
Segment Reporting Information [Line Items]
Net sales	[7]														2,411.6		2,429.9		2,507.1
Operating income (loss)															147.6		445.0
Assets								3,786.8									3,786.8
CHCI
Segment Reporting Information [Line Items]
Net sales															1,495.9		1,491.0		1,652.2
Operating income (loss)															16.5
Assets								5,029.0									5,029.0
RX
Segment Reporting Information [Line Items]
Net sales															824.2		969.7		1,042.8
Operating income (loss)															222.6
Assets								2,813.0									2,813.0
Other(1)
Segment Reporting Information [Line Items]
Net sales															0.0
Operating income (loss)															0.0
Unallocated
Segment Reporting Information [Line Items]
Operating income (loss)															(150.2)		(175.6)
Ireland
Segment Reporting Information [Line Items]
Net sales															25.7		30.4		89.1
Property, plant and equipment, net		9.8						4.6							9.8		4.6
United States
Segment Reporting Information [Line Items]
Net sales	[6]														3,098.3		3,272.3		3,353.0
Property, plant and equipment, net		548.7						538.3							548.7		538.3
Europe
Segment Reporting Information [Line Items]
Net sales	[6],[8]														1,347.6		1,343.6		$ 1,582.1
Property, plant and equipment, net		152.3						160.2							152.3		160.2
Israel
Segment Reporting Information [Line Items]
Property, plant and equipment, net		77.6						81.5							77.6		81.5
All other countries
Segment Reporting Information [Line Items]
Property, plant and equipment, net		50.5						53.1							$ 50.5		$ 53.1
Walmart | Net sales | Customer Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk percentage															12.80%		13.00%		13.00%
Operating Segments | CHCA
Segment Reporting Information [Line Items]
Net sales															$ 2,411.6		$ 2,429.9		$ 2,507.1
Operating income (loss)																			$ 399.8
Operating income %															6.10%		18.30%		15.90%
Assets		3,571.7													$ 3,571.7				$ 3,351.3
Capital expenditures															65.0		$ 39.5		59.1
Depreciation/amortization															104.8		115.2		119.1
Property, plant and equipment, net		530.3						512.7							530.3		512.7		528.3
Change in financial assets															$ 0.0		0.0		0.0
Operating Segments | CHCI
Segment Reporting Information [Line Items]
Net sales																	1,491.0		1,652.2
Operating income (loss)																	$ 12.5		$ (2,087.4)
Operating income %															1.10%		0.80%		(126.30%)
Assets		4,729.2													$ 4,729.2				$ 4,795.2
Capital expenditures															21.8		$ 27.5		23.7
Depreciation/amortization															223.2		223.7		210.0
Property, plant and equipment, net		165.0						180.9							165.0		180.9		167.2
Change in financial assets															0.0		0.0		0.0
Operating Segments | RX
Segment Reporting Information [Line Items]
Net sales															$ 824.2		969.7		1,042.8
Operating income (loss)																	$ 307.6		$ (0.2)
Operating income %															27.00%		31.70%		0.00%
Assets		2,682.5													$ 2,682.5				$ 2,646.4
Capital expenditures															15.8		$ 21.6		20.4
Depreciation/amortization															95.6		100.1		120.1
Property, plant and equipment, net		133.8						139.5							133.8		139.5		129.7
Change in financial assets															$ 0.0		0.0		0.0
Operating Segments | Other(1)
Segment Reporting Information [Line Items]
Net sales																	55.6		78.5
Operating income (loss)																	$ 8.7		$ (195.1)
Operating income %															0.00%		15.60%		7.80%
Assets		0.0						0.0							$ 0.0		$ 0.0		$ 3,077.2
Capital expenditures															0.0		0.0		3.0
Depreciation/amortization															0.0		5.8		7.8
Property, plant and equipment, net		0.0						0.0							0.0		0.0		44.9
Change in financial assets															$ 0.0		$ 0.0		2,608.2
Unallocated
Segment Reporting Information [Line Items]
Net sales																			0.0
Operating income (loss)																			$ (116.8)
Operating income %															0.00%		0.00%		0.00%
Assets		0.0						0.0							$ 0.0		$ 0.0		$ 0.0
Capital expenditures															0.0		0.0		0.0
Depreciation/amortization															0.0		0.0		0.0
Property, plant and equipment, net		$ 0.0						$ 0.0							0.0		0.0		0.0
Change in financial assets															(188.7)		24.9		$ 0.0
Unallocated | Unallocated
Segment Reporting Information [Line Items]
Net sales															$ 0.0		$ 0.0

[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] (1)    Includes net sales from our OTC contract manufacturing business.

[8] (2)Includes Ireland net sales of $25.7 million, $30.4 million, and $89.1 million for the years ended December 31, 2018, December 31, 2017, and December 31, 2016, respectively.