Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows provided from (used by) operating activities:
Net loss	$ (775)	$ (293)
Adjustments to reconcile net loss to net cash provided from (used by) operating activities:
Depreciation and amortization	1,670	1,469
Loss on extinguishment of debt and debt exchanges	89	7
Pension settlement costs	77
Pension/OPEB costs	22	59
Stock-based compensation expense	10	21
Amortization of deferred financing costs	26	38
Other adjustments	(11)
Deferred income taxes	(286)	(163)
Goodwill Impairment	670
Change in accounts receivable	161	(56)
Change in accounts payable and other liabilities	(471)	(108)
Change in prepaid expenses, income taxes and other current assets	3	(12)
Net cash provided from operating activities	1,185	962
Cash flows provided from (used by) investing activities:
Capital expenditures - Business operations	(846)	(960)
Capital expenditures - Integration activities	(19)	(99)
Cash paid for the CTF Acquisition		(9,886)
Proceeds on sale of assets	109
Other	6
Net cash used by investing activities	(750)	(10,945)
Cash flows provided from (used by) financing activities:
Proceeds from long-term debt borrowings	1,500	1,625
Long-term debt payments	(1,662)	(113)
Financing costs paid	(15)	(38)
Premium paid to retire debt	(80)
Dividends paid on common stock	(219)	(370)
Dividends paid on preferred stock	(161)	(161)
Capital lease obligation payments	(30)	(8)
Taxes paid on behalf of employees for shares withheld	(5)	(10)
Other	1	9
Net cash provided from (used by) financing activities	(671)	934
Decrease in cash, cash equivalents, and restricted cash	(236)	(9,049)
Cash, cash equivalents, and restricted cash at January 1,	522	9,380
Cash, cash equivalents, and restricted cash at September 30,	286	331
Cash paid (received) during the period for:
Interest	1,373	1,277
Income tax refunds, net	$ (4)	$ (35)