Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
TOTAL REVENUES	$ 745,466	$ 786,887	$ 2,160,689	$ 2,700,218
COSTS AND EXPENSES:
Cost of revenues	412,965	514,522	1,198,468	1,722,885
Selling, general and administrative	163,791	135,880	478,615	468,675
Research and development	39,683	39,644	160,431	123,522
Litigation-related and other contingencies, net	(1,750)	(12,352)	15,370	(14,016)
Asset impairment charges	142,217	94,924	613,400	1,023,930
Acquisition-related and integration items	1,288	16,641	13,284	31,711
OPERATING LOSS FROM CONTINUING OPERATIONS	(12,728)	(2,372)	(318,879)	(656,489)
INTEREST EXPENSE, NET	131,847	127,521	385,896	361,267
LOSS ON EXTINGUISHMENT OF DEBT	0	0	0	(51,734)
OTHER INCOME, NET	(1,507)	(2,097)	(33,216)	(10,843)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAX	(143,068)	(127,796)	(671,559)	(1,058,647)
INCOME TAX EXPENSE (BENEFIT)	3,003	(28,109)	24,729	(97,517)
LOSS FROM CONTINUING OPERATIONS	(146,071)	(99,687)	(696,288)	(961,130)
DISCONTINUED OPERATIONS, NET OF TAX (NOTE 3)	(27,134)	3,017	(43,273)	(705,886)
NET LOSS	$ (173,205)	$ (96,670)	$ (739,561)	$ (1,667,016)
NET (LOSS) INCOME PER SHARE—BASIC:
Continuing operations (in dollars per share)	$ (0.65)	$ (0.45)	$ (3.11)	$ (4.31)
Discontinued operations (in dollars per share)	(0.12)	0.02	(0.19)	(3.16)
Basic (in dollars per share)	(0.77)	(0.43)	(3.30)	(7.47)
NET (LOSS) INCOME PER SHARE—DILUTED:
Continuing operations (in dollars per share)	(0.65)	(0.45)	(3.11)	(4.31)
Discontinued operations (in dollars per share)	(0.12)	0.02	(0.19)	(3.16)
Diluted (in dollars per share)	$ (0.77)	$ (0.43)	$ (3.30)	$ (7.47)
WEIGHTED AVERAGE SHARES:
Basic (shares)	224,132	223,299	223,829	223,157
Diluted (shares)	224,132	223,299	223,829	223,157