CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
OPERATING ACTIVITIES
Net (loss) income	$ (5,492)	$ 679
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	3,619	3,858
Impairment of goodwill and other assets	6,516	46
Deferred income taxes	350	486
Provision for uncollectible accounts	116	119
Net (gain) loss on early retirement of debt	(70)	30
Share-based compensation	114	144
Changes in current assets and liabilities:
Accounts receivable	(7)	(8)
Accounts payable	(265)	(151)
Accrued income and other taxes	131	217
Other current assets and liabilities, net	(323)	(42)
Retirement benefits	(24)	(639)
Changes in other noncurrent assets and liabilities, net	72	324
Other, net	34	(27)
Net cash provided by operating activities	4,771	5,036
INVESTING ACTIVITIES
Capital expenditures	(2,688)	(2,260)
Proceeds from sale of property, plant and equipment and other assets	54	125
Other, net	(37)	(61)
Net cash used in investing activities	(2,671)	(2,196)
FINANCING ACTIVITIES
Net proceeds from issuance of long-term debt	988	130
Payments of long-term debt	(1,459)	(1,539)
Net proceeds on revolving line of credit	150	185
Dividends paid	(829)	(1,735)
Other, net	(37)	(48)
Net cash used in financing activities	(1,187)	(3,007)
Net increase (decrease) in cash, cash equivalents and restricted cash	913	(167)
Cash, cash equivalents and restricted cash at beginning of period	518	587
Cash, cash equivalents and restricted cash at end of period	1,431	420
Supplemental cash flow information:
Income taxes refunded, net	54	674
Interest paid (net of capitalized interest of $50 and $42)	(1,506)	(1,571)
Total	$ 518	$ 587