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, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Total consolidated income (loss) from continuing operations before income tax	$ 25,252	$ (94,584)	$ 46,501	$ (96,293)
Amortization of intangible assets	104,500	140,400	221,735	286,000
Asset impairment charges	0	88,438	97,785	253,886
Acquisition-related costs	6,045	(5,507)	18,507	(43,008)
Gain on extinguishment of debt	0	0	0	(119,828)
Total segment adjusted income from continuing operations before income tax	347,625	334,892	781,467	688,864
Payments of debt restructuring costs	30,700		30,700
Retention Bonus
Segment Reporting Information [Line Items]
Expenses	17,900		4,100
Accelerated depreciation
Segment Reporting Information [Line Items]
Expenses	1,800		8,400
Employee severance
Segment Reporting Information [Line Items]
Expenses		400		2,200
Other restructuring charges
Segment Reporting Information [Line Items]
Expenses	3,600	1,700	6,400	1,900
Segment reconciling items
Segment Reporting Information [Line Items]
Interest expense, net	129,164	134,809	262,041	267,484
Corporate unallocated costs	33,590	38,365	76,912	86,460
Amortization of intangible assets	104,498	140,418	221,735	286,017
Upfront and milestone payments to partners	444	1,444	2,194	2,383
Continuity and separation benefits and other cost reduction initiatives	9,444	2,124	32,664	4,149
Certain litigation-related and other contingencies, net	(8,572)	10,315	(25,748)	10,321
Certain legal costs	18,005	18,984	33,541	35,673
Asset impairment charges	0	88,438	97,785	253,886
Acquisition-related costs	6,045	(5,507)	18,507	(43,008)
Gain on extinguishment of debt	0	0	0	(119,828)
Foreign currency impact related to the remeasurement of intercompany debt instruments	3,005	2,262	(4,089)	3,796
Other, net	26,750	(2,176)	19,424	(2,176)
Operating segments
Segment Reporting Information [Line Items]
Total segment adjusted income from continuing operations before income tax	$ 347,625	$ 334,892	$ 781,467	$ 688,864

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