CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
OPERATING ACTIVITIES
Net income (loss)	$ 691	$ (5,794)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	2,322	2,384
Impairment of goodwill	0	6,506
Deferred income taxes	220	244
Provision for uncollectible accounts	90	85
Net loss (gain) on early retirement of debt	86	(66)
Share-based compensation	89	76
Changes in current assets and liabilities:
Accounts receivable	(2)	(132)
Accounts payable	(227)	(266)
Accrued income and other taxes	(3)	20
Other current assets and liabilities, net	(203)	(233)
Retirement benefits	(62)	(8)
Changes in other noncurrent assets and liabilities, net	51	67
Other, net	(4)	0
Net cash provided by operating activities	3,048	2,883
INVESTING ACTIVITIES
Capital expenditures	(1,983)	(1,731)
Proceeds from sale of property, plant and equipment and other assets	84	26
Other, net	1	(12)
Net cash used in investing activities	(1,898)	(1,717)
FINANCING ACTIVITIES
Net proceeds from issuance of long-term debt	2,425	0
Payments of long-term debt	(3,696)	(760)
Net proceeds from revolving line of credit	825	100
Dividends paid	(562)	(554)
Other, net	(75)	(30)
Net cash used in financing activities	(1,083)	(1,244)
Net increase (decrease) in cash, cash equivalents and restricted cash	67	(78)
Cash, cash equivalents and restricted cash at beginning of period	1,717	518
Cash, cash equivalents and restricted cash at end of period	1,784	440
Supplemental cash flow information:
Income taxes paid, net	(20)	(22)
Interest paid (net of capitalized interest of $43 and $32)	(828)	(1,050)
Total	$ 1,784	$ 440