CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
TOTAL REVENUES, NET	$ 820,405	$ 720,411
COSTS AND EXPENSES:
Cost of revenues	388,799	391,909
Selling, general and administrative	166,768	151,123
Research and development	31,615	33,486
Litigation-related and other contingencies, net	(17,176)	6
Asset impairment charges	97,785	165,448
Acquisition-related and integration items, net	12,462	(37,501)
Interest expense, net	132,877	132,675
Gain on extinguishment of debt	0	(119,828)
Other (income) expense, net	(13,974)	4,802
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAX	21,249	(1,709)
INCOME TAX (BENEFIT) EXPENSE	(136,332)	10,903
INCOME (LOSS) FROM CONTINUING OPERATIONS	157,581	(12,612)
DISCONTINUED OPERATIONS, NET OF TAX (NOTE 3)	(27,651)	(5,961)
NET INCOME (LOSS)	$ 129,930	$ (18,573)
NET INCOME (LOSS) PER SHARE—BASIC:
Continuing operations (in dollars per share)	$ 0.69	$ (0.06)
Discontinued operations (in dollars per share)	(0.12)	(0.02)
Basic (in dollars per share)	0.57	(0.08)
NET INCOME (LOSS) PER SHARE—DILUTED:
Continuing operations (in dollars per share)	0.68	(0.06)
Discontinued operations (in dollars per share)	(0.12)	(0.02)
Diluted (in dollars per share)	$ 0.56	$ (0.08)
WEIGHTED AVERAGE SHARES:
Basic (in shares)	227,198	224,594
Diluted (in shares)	233,014	224,594