Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income (loss)	$ 989	$ 357
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Depreciation, depletion and amortization	1,184	1,163
Impairments and other charges	312	262
Changes in assets and liabilities:
Accounts payable	601	611
Inventories	(542)	(49)
Receivables	(431)	(1,064)
Other	192	177
Total cash flows provided by operating activities	2,305	1,457
Cash flows from investing activities:
Capital expenditures	(1,475)	(934)
Sales of investment securities	522	67
Purchases of investment securities	(420)	(77)
Payments to acquire businesses, net of cash acquired	(166)	(628)
Proceeds from sales of property, plant and equipment	158	111
Other investing activities	(58)	(46)
Total cash flows used in investing activities	(1,439)	(1,507)
Cash flows from financing activities:
Dividends to shareholders	(473)	(469)
Payments on long-term borrowings	(436)	(1,633)
Stock repurchase program	(200)	0
Other financing activities	28	92
Total cash flows used in financing activities	(1,081)	(2,010)
Effect of exchange rate changes on cash	(65)	(51)
Decrease in cash and equivalents	(280)	(2,111)
Cash and equivalents at beginning of period	2,337	4,009
Cash and equivalents at end of period	2,057	1,898
Cash payments during the period for:
Interest	415	455
Income taxes	$ 191	$ (240)