Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income (loss)	$ (1,129)	$ 1,657	$ (468)
Adjustments to reconcile net income (loss) to cash flows from operating activities:
Impairments and other charges	2,506	265	647
Cash impact of impairments and other charges - severance payments	(144)	0	0
Depreciation, depletion and amortization	1,625	1,606	1,556
Deferred income tax provision (benefit), continuing operations	(396)	(267)	734
Changes in assets and liabilities:
Receivables	636	(186)	(1,350)
Accounts payable	(595)	483	753
Inventories	(202)	(681)	(29)
Other operating activities	144	280	625
Total cash flows provided by (used in) operating activities	2,445	3,157	2,468
Cash flows from investing activities:
Capital expenditures	(1,530)	(2,026)	(1,373)
Proceeds from sales of property, plant and equipment	190	218	158
Payments to acquire businesses, net of cash acquired	(33)	(187)	(628)
Other investing activities	(72)	2	(84)
Total cash flows provided by (used in) investing activities	(1,445)	(1,993)	(1,927)
Cash flows from financing activities:
Dividends to shareholders	(630)	(630)	(626)
Proceeds from issuance of common stock	118	195	158
Stock repurchase program	(100)	(400)	0
Payments on long-term borrowings	(13)	(445)	(1,641)
Other financing activities	(70)	(139)	(52)
Total cash flows provided by (used in) financing activities	(695)	(1,419)	(2,161)
Effect of exchange rate changes on cash	(45)	(74)	(52)
Increase (decrease) in cash and equivalents	260	(329)	(1,672)
Cash and equivalents at beginning of year	2,008	2,337	4,009
Cash and equivalents at end of year	2,268	2,008	2,337
Cash payments (receipts) during the period for:
Interest	534	556	594
Income taxes	$ 363	$ 178	$ (178)