Segment Results - Schedule of Reconciliations of Consolidated Adjusted Income (Loss) Before Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Total consolidated loss from continuing operations before income tax	$ (94,584)	$ (46,244)	$ (96,293)	$ (528,491)
Interest expense, net	134,809	130,059	267,484	254,049
Amortization of intangible assets	140,400	153,200	286,017	310,400
Inventory step-up			0	190
Asset impairment charges	88,438	22,767	253,886	471,183
Acquisition-related costs	(5,507)	5,161	(43,008)	11,996
Gain on extinguishment of debt	0	0	(119,828)	0
Severance costs	400	5,400	2,200	30,600
Accelerated depreciation		18,100		35,200
Other restructuring charges
Segment Reporting Information [Line Items]
Restructuring expenses	1,700	5,400	1,900	9,700
Inventory write-offs
Segment Reporting Information [Line Items]
Restructuring expenses		200		2,600
Segment reconciling items
Segment Reporting Information [Line Items]
Interest expense, net	134,809	130,059	267,484	254,049
Corporate unallocated costs	38,365	43,046	86,460	95,506
Amortization of intangible assets	140,418	153,215	286,017	310,387
Inventory step-up	0	124	0	190
Upfront and milestone payments to partners	1,444	36,964	2,383	38,296
Separation benefits and other cost reduction initiatives	2,124	29,153	4,149	78,140
Certain litigation-related and other contingencies, net	10,315	19,620	10,321	17,120
Asset impairment charges	88,438	22,767	253,886	471,183
Acquisition-related costs	(5,507)	5,161	(43,008)	11,996
Gain on extinguishment of debt	0	0	(119,828)	0
Foreign currency impact related to the remeasurement of intercompany debt instruments	2,262	(574)	3,796	(3,088)
Other, net	(2,176)	(27,433)	(2,176)	(28,173)
Operating segments
Segment Reporting Information [Line Items]
Total segment adjusted income from continuing operations before income tax	$ 315,908	$ 365,858	$ 653,191	$ 717,115