Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income (loss)	$ 525	$ 989
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Depreciation, depletion and amortization	1,253	1,184
Impairments and other charges	308	265
Changes in assets and liabilities:
Inventories	(380)	(542)
Accounts payable	(283)	601
Receivables	7	(431)
Other operating activities	(152)	239
Total cash flows provided by operating activities	1,278	2,305
Cash flows from investing activities:
Capital expenditures	(1,190)	(1,475)
Proceeds from sales of property, plant and equipment	143	158
Payments to acquire businesses	(31)	(166)
Other investing activities	(52)	44
Total cash flows used in investing activities	(1,130)	(1,439)
Cash flows from financing activities:
Dividends to shareholders	(472)	(473)
Stock repurchase program	(100)	(200)
Payments on long-term borrowings	(11)	(436)
Other financing activities	33	28
Total cash flows used in financing activities	(550)	(1,081)
Effect of exchange rate changes on cash	(35)	(65)
Decrease in cash and equivalents	(437)	(280)
Cash and equivalents at beginning of period	2,008	2,337
Cash and equivalents at end of period	1,571	2,057
Cash payments during the period for:
Interest	394	415
Income taxes	$ 288	$ 191