Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ (1,015)	$ 152
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Depreciation, depletion and amortization	348	416
Impairments and other charges	1,073	61
Changes in assets and liabilities:
Receivables	(371)	(339)
Accounts payable	250	60
Inventories	(79)	(236)
Other operating activities	19	(158)
Total cash flows provided by operating activities	225	(44)
Cash flows from investing activities:
Capital expenditures	(213)	(437)
Proceeds from sales of property, plant and equipment	69	43
Other investing activities	(21)	(17)
Total cash flows used in investing activities	(165)	(411)
Cash flows from financing activities:
Payments on long-term borrowings	(1,651)	(8)
Proceeds from issuance of long-term debt, net	994	0
Dividends to shareholders	(158)	(157)
Stock repurchase program	(100)	0
Other financing activities	12	10
Total cash flows used in financing activities	(903)	(155)
Effect of exchange rate changes on cash	(40)	(18)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(883)	(628)
Cash and equivalents at beginning of period	2,268	2,008
Cash and equivalents at end of period	1,385	1,380
Cash payments during the period for:
Interest	144	128
Income taxes	$ 116	$ 81