Segment Results - Schedule Of Reconciliations Of Consolidated Adjusted Income (Loss) Before Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Total consolidated loss from continuing operations before income tax	$ (1,709)	$ (482,247)
Interest expense, net	132,675	123,990
Amortization of intangible assets	145,599	157,200
Asset impairment charges	165,448	448,416
Acquisition-related costs	(37,501)	6,835
Gain (loss) on extinguishment of debt	(119,828)	0
Severance costs	1,800	25,200
Accelerated depreciation		17,100
Inventory write-offs
Segment Reporting Information [Line Items]
Restructuring expenses		2,400
Other restructuring charges
Segment Reporting Information [Line Items]
Restructuring expenses	200	4,300
Segment reconciling items
Segment Reporting Information [Line Items]
Interest expense, net	132,675	123,990
Corporate unallocated costs	48,095	52,460
Amortization of intangible assets	145,599	157,172
Inventory step-up	0	66
Upfront and milestone payments to partners	939	1,332
Separation benefits and other cost reduction initiatives	2,025	48,987
Certain litigation-related and other contingencies, net	6	(2,500)
Asset impairment charges	165,448	448,416
Acquisition-related costs	(37,501)	6,835
Gain (loss) on extinguishment of debt	(119,828)	0
Foreign currency impact related to the remeasurement of intercompany debt instruments	1,534	(2,514)
Other, net	0	(740)
Operating segments
Segment Reporting Information [Line Items]
Total segment adjusted income from continuing operations before income tax	$ 337,283	$ 351,257