CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
TOTAL REVENUES, NET	$ 729,426	$ 745,466	$ 2,149,564	$ 2,160,689
COSTS AND EXPENSES:
Cost of revenues	389,165	412,965	1,169,282	1,198,468
Selling, general and administrative	168,329	163,791	471,749	478,615
Research and development	36,519	39,683	96,353	160,431
Litigation-related and other contingencies, net	(14,414)	(1,750)	(4,093)	15,370
Asset impairment charges	4,766	142,217	258,652	613,400
Acquisition-related and integration items	16,025	1,288	(26,983)	13,284
Interest expense, net	136,903	131,847	404,387	385,896
Gain on extinguishment of debt	0	0	(119,828)	0
Other expense (income), net	16,203	(1,507)	20,408	(33,216)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAX	(24,070)	(143,068)	(120,363)	(671,559)
INCOME TAX EXPENSE	17,361	3,003	31,732	24,729
LOSS FROM CONTINUING OPERATIONS	(41,431)	(146,071)	(152,095)	(696,288)
DISCONTINUED OPERATIONS, NET OF TAX (NOTE 3)	(37,984)	(27,134)	(51,898)	(43,273)
NET LOSS	$ (79,415)	$ (173,205)	$ (203,993)	$ (739,561)
NET LOSS PER SHARE—BASIC:
Continuing operations (in dollars per share)	$ (0.18)	$ (0.65)	$ (0.67)	$ (3.11)
Discontinued operations (in dollars per share)	(0.17)	(0.12)	(0.23)	(0.19)
Basic (in dollars per share)	(0.35)	(0.77)	(0.90)	(3.30)
NET LOSS PER SHARE—DILUTED:
Continuing operations (in dollars per share)	(0.18)	(0.65)	(0.67)	(3.11)
Discontinued operations (in dollars per share)	(0.17)	(0.12)	(0.23)	(0.19)
Diluted (in dollars per share)	$ (0.35)	$ (0.77)	$ (0.90)	$ (3.30)
WEIGHTED AVERAGE SHARES:
Basic (in shares)	226,598	224,132	225,804	223,829
Diluted (in shares)	226,598	224,132	225,804	223,829