Segment Results - Schedule of Reconciliations of Consolidated Adjusted Income (Loss) Before Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Total consolidated income (loss) from continuing operations before income tax	$ 21,249	$ (1,709)
Amortization of intangible assets	117,237	145,600
Asset impairment charges	97,785	165,448
Acquisition-related costs	12,462	(37,501)
Gain on extinguishment of debt	0	(119,828)
Retention Bonus
Segment Reporting Information [Line Items]
Expenses	13,700
Accelerated depreciation
Segment Reporting Information [Line Items]
Expenses	6,600
Employee severance
Segment Reporting Information [Line Items]
Expenses	100	1,800
Other restructuring charges
Segment Reporting Information [Line Items]
Expenses	2,800	200
Segment reconciling items
Segment Reporting Information [Line Items]
Interest expense, net	132,877	132,675
Corporate unallocated costs	43,322	48,095
Amortization of intangible assets	117,237	145,599
Upfront and milestone payments to partners	1,750	939
Separation benefits and other cost reduction initiatives	23,220	2,025
Certain litigation-related and other contingencies, net	(17,176)	6
Certain legal costs	15,536	16,689
Asset impairment charges	97,785	165,448
Acquisition-related costs	12,462	(37,501)
Gain on extinguishment of debt	0	(119,828)
Foreign currency impact related to the remeasurement of intercompany debt instruments	(7,094)	1,534
Other, net	(7,326)	0
Operating segments
Segment Reporting Information [Line Items]
Total consolidated income (loss) from continuing operations before income tax	$ 433,842	$ 353,972

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