Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ 171	$ (1,015)
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Impairments and other charges	0	1,073
Depreciation, depletion and amortization	226	348
Changes in assets and liabilities:
Receivables	(145)	(371)
Accounts payable	205	250
Inventories	(1)	(79)
Other operating activities	(186)	132
Total cash flows provided by operating activities	203	225
Cash flows from investing activities:
Capital expenditures	(104)	(213)
Proceeds from sales of property, plant and equipment	58	69
Other investing activities	(16)	(21)
Total cash flows used in investing activities	(62)	(165)
Cash flows from financing activities:
Payments on long-term borrowings	(188)	(1,651)
Proceeds from issuance of long-term debt, net	0	994
Dividends to shareholders	(40)	(158)
Stock repurchase program	0	(100)
Other financing activities	5	12
Total cash flows used in financing activities	(223)	(903)
Effect of exchange rate changes on cash	(35)	(40)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(117)	(883)
Cash and equivalents at beginning of period	2,563	2,268
Cash and equivalents at end of period	2,446	1,385
Cash payments during the period for:
Interest	138	144
Income taxes	$ 54	116
Maximum Percentage Gross Trade Receivables From One Customer	10.00%
Increase (Decrease) in Employee Related Liabilities	$ (67)	$ (113)