CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CASH FLOW FROM OPERATING ACTIVITIES
Net loss	$ (146)	$ (2,013)
Adjustments to reconcile net loss to net cash provided by operating activities:
Discontinued operations, net	445	0
Depreciation, depletion and amortization of assets	2,194	2,309
Deferred income tax benefit	(81)	(218)
Asset impairments and other charges	135	1,768
Gains on sales of equity investments and other assets, net	(111)	(7)
Other noncash benefits to income	(301)	(355)
Changes in operating assets and liabilities:
(Increase) decrease in receivables	(937)	3,909
(Increase) in inventory	(311)	(68)
(Increase) decrease in other current assets	(82)	254
(Decrease) in accounts payable and accrued liabilities	(42)	(4,332)
Increase in current domestic and foreign income taxes	25	48
Operating cash flow from continuing operations	788	1,295
Operating cash flow from discontinued operations, net of taxes	122	44
Net cash provided by operating activities	910	1,339
CASH FLOW FROM INVESTING ACTIVITIES
Capital expenditures	(579)	(1,300)
Change in capital accrual	(75)	(435)
Purchases of businesses and assets, net	(105)	(35)
Proceeds from sales of equity investments and other assets, net	496	112
Equity investments and other, net	(10)	142
Investing cash flow from continuing operations	(273)	(1,516)
Investing cash flow from discontinued operations	(9)	(14)
Net cash used by investing activities	(282)	(1,530)
CASH FLOW FROM FINANCING ACTIVITIES
Payments of long-term debt	(174)	0
Proceeds from issuance of common stock	6	90
Purchases of treasury stock	(3)	0
Cash dividends paid on common and preferred stock	(211)	(913)
Financing portion of net cash received (paid) for derivative instruments	45
Financing portion of net cash received (paid) for derivative instruments		(149)
Other financing, net	(15)	(47)
Financing cash flow from continuing operations	(352)	(1,019)
Financing cash flow from discontinued operations	(2)	0
Net cash used by financing activities	(354)	(1,019)
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents	274	(1,210)
Cash, cash equivalents, restricted cash and restricted cash equivalents — beginning of period	2,194	3,574
Cash, cash equivalents, restricted cash and restricted cash equivalents — end of period	$ 2,468	$ 2,364