Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income (loss)	$ 401	$ (2,696)
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Impairments and other charges	0	3,220
Depreciation, depletion and amortization	449	599
Deferred Income Tax Expense (Benefit)	0	(353)
Changes in assets and liabilities:
Receivables	(306)	1,079
Accounts payable	323	(744)
Inventories	(6)	(39)
Other operating activities	(231)	175
Total cash flows provided by operating activities	612	823
Cash flows from investing activities:
Capital expenditures	(295)	(355)
Proceeds from sales of property, plant and equipment	105	122
Other investing activities	(31)	(48)
Total cash flows used in investing activities	(221)	(281)
Cash flows from financing activities:
Payments on long-term borrowings	(192)	(1,653)
Proceeds from issuance of long-term debt, net	0	994
Dividends to shareholders	(80)	(198)
Stock repurchase program	0	(100)
Other financing activities	4	20
Total cash flows used in financing activities	(268)	(937)
Effect of exchange rate changes on cash	(28)	(62)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	95	(457)
Cash and equivalents at beginning of period	2,563	2,268
Cash and equivalents at end of period	2,658	1,811
Cash payments during the period for:
Interest	261	258
Income taxes	$ 123	197
Maximum Percentage Gross Trade Receivables From One Customer	10.00%
Increase (Decrease) in Employee Related Liabilities	$ (18)	$ (418)