Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income (loss)	$ 229	$ 555
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Depreciation, depletion and amortization	836	784
Impairments and other charges	308	265
Changes in assets and liabilities:
Receivables	(394)	(352)
Inventories	(347)	(306)
Accounts payable	(14)	495
Other operating activities	(211)	87
Total cash flows provided by operating activities	407	1,528
Cash flows from investing activities:
Capital expenditures	(845)	(1,066)
Proceeds from sales of property, plant and equipment	87	121
Payments to acquire businesses	(21)	(148)
Other investing activities	(32)	(344)
Total cash flows used in investing activities	(811)	(1,437)
Cash flows from financing activities:
Dividends to shareholders	(314)	(316)
Stock repurchase program	(100)	0
Other financing activities	6	(14)
Total cash flows used in financing activities	(408)	(330)
Effect of exchange rate changes on cash	(20)	(40)
Decrease in cash and equivalents	(832)	(279)
Cash and equivalents at beginning of period	2,008	2,337
Cash and equivalents at end of period	1,176	2,058
Cash payments during the period for:
Interest	266	286
Income taxes	$ 208	$ 135