CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
REVENUES	$ 2,287	$ 7,242	$ 6,748
COSTS AND EXPENSES:
Operating costs and expenses (exclusive of items shown separately below)	1,518	4,802	4,444
Depreciation and amortization	535	1,580	1,568
Other operating expenses, net	16	69	42
Total costs and expenses	2,069	6,451	6,054
Income from operations	218	791	694
OTHER EXPENSES:
Interest expense, net	(217)	(871)	(638)
Loss on extinguishment of debt	0	(128)	0
Gain (loss) on derivative instruments, net	5	(10)	(3)
Other expense, net	0	(3)	0
Total other expenses	(212)	(1,012)	(641)
Income (loss) before income taxes	6	(221)	53
Income tax benefit (expense)	(59)	72	(188)
Net income (loss)	$ (53)	$ (149)	$ (135)
EARNINGS (LOSS) PER COMMON SHARE
Loss Per Share, Basic and Diluted (in dollars per share)	$ (0.49)	$ (1.33)	$ (1.26)
Weighted average common shares outstanding, basic and diluted (in shares)	108,792,605	111,790,076	107,744,534