CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
TOTAL REVENUES, NET	$ 634,860	$ 729,426	$ 2,142,853	$ 2,149,564
COSTS AND EXPENSES:
Cost of revenues	348,077	389,165	1,072,972	1,169,282
Selling, general and administrative	182,259	168,329	522,285	471,749
Research and development	32,055	36,519	94,165	96,353
Litigation-related and other contingencies, net	1,810	(14,414)	(23,938)	(4,093)
Asset impairment charges	8,412	4,766	106,197	258,652
Acquisition-related and integration items, net	(1,407)	16,025	17,100	(26,983)
Interest expense, net	135,648	136,903	397,689	404,387
Gain on extinguishment of debt	0	0	0	(119,828)
Other (income) expense, net	(7,194)	16,203	(25,318)	20,408
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAX	(64,800)	(24,070)	(18,299)	(120,363)
INCOME TAX EXPENSE (BENEFIT)	4,174	17,361	(124,516)	31,732
(LOSS) INCOME FROM CONTINUING OPERATIONS	(68,974)	(41,431)	106,217	(152,095)
DISCONTINUED OPERATIONS, NET OF TAX (NOTE 3)	(6,913)	(37,984)	(41,616)	(51,898)
NET (LOSS) INCOME	$ (75,887)	$ (79,415)	$ 64,601	$ (203,993)
NET (LOSS) INCOME PER SHARE—BASIC:
Continuing operations (in dollars per share)	$ (0.30)	$ (0.18)	$ 0.46	$ (0.67)
Discontinued operations (in dollars per share)	(0.03)	(0.17)	(0.18)	(0.23)
Basic (in dollars per share)	(0.33)	(0.35)	0.28	(0.90)
NET (LOSS) INCOME PER SHARE—DILUTED:
Continuing operations (in dollars per share)	(0.30)	(0.18)	0.46	(0.67)
Discontinued operations (in dollars per share)	(0.03)	(0.17)	(0.18)	(0.23)
Diluted (in dollars per share)	$ (0.33)	$ (0.35)	$ 0.28	$ (0.90)
WEIGHTED AVERAGE SHARES:
Basic (in shares)	230,040	226,598	228,985	225,804
Diluted (in shares)	230,040	226,598	233,379	225,804