Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows provided from (used by) operating activities:
Net loss	$ (424)	$ (775)
Adjustments to reconcile net loss to net cash provided from (used by) operating activities:
Depreciation and amortization	1,462	1,670
(Gain) loss on extinguishment of debt	(31)	89
Pension settlement costs	34	77
Stock-based compensation expense	14	10
Amortization of deferred financing costs	26	26
Other adjustments	(24)	(11)
Deferred income taxes	(12)	(286)
Goodwill impairment	400	670
Change in accounts receivable	43	161
Change in accounts payable and other liabilities	(239)	(449)
Change in prepaid expenses, income taxes and other assets	(40)	3
Net cash provided from operating activities	1,209	1,185
Cash flows provided from (used by) investing activities:
Capital expenditures - Business operations	(947)	(846)
Capital expenditures - Integration activities		(19)
Proceeds on sale of assets	11	109
Other	4	6
Net cash used by investing activities	(932)	(750)
Cash flows provided from (used by) financing activities:
Proceeds from long-term debt borrowings	1,840	1,500
Long-term debt payments	(1,997)	(1,662)
Financing costs paid	(43)	(15)
Premium paid to retire debt	(17)	(80)
Dividends paid on common stock		(219)
Dividends paid on preferred stock	(107)	(161)
Capital lease obligation payments	(30)	(30)
Other	(11)	(4)
Net cash used by financing activities	(365)	(671)
Decrease in cash, cash equivalents, and restricted cash	(88)	(236)
Cash, cash equivalents, and restricted cash at January 1,	376	522
Cash, cash equivalents, and restricted cash at September 30,	288	286
Cash paid (received) during the period for:
Interest	1,266	1,373
Income tax payments (refunds), net	$ 5	$ (4)