Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities:
Net income	$ (796)	$ 335
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	1,241	1,159
Impairments	97	24
Exploratory dry well costs and unproved property impairments	40	69
Net gain on disposal of assets	(7)	(34)
Deferred income taxes	(14)	(33)
Net (gain) loss on derivative instruments	(132)	75
Net settlements of derivative instruments	57	27
Pension and other post retirement benefits, net	(31)	(41)
Stock-based compensation	28	32
Equity method investments, net	180	12
Changes in:
Current receivables	489	(95)
Inventories	(5)	3
Current accounts payable and accrued liabilities	(456)	(158)
Other current assets and liabilities	46	119
All other operating, net	(27)	(182)
Net cash provided by operating activities	710	1,312
Investing activities:
Additions to property, plant and equipment	(946)	(1,262)
Additions to other assets	12	42
Acquisitions, net of cash acquired	3	0
Disposal of assets, net of cash transferred to the buyer	9	69
Equity method investments - return of capital	7	49
All other investing, net	0	(27)
Net cash used in investing activities	(915)	(1,129)
Financing activities:
Purchases of common stock	(92)	(266)
Dividends paid	(40)	(82)
All other financing, net	1	(2)
Net cash used in financing activities	(131)	(350)
Effect of exchange rate on cash and cash equivalents	0	1
Net decrease in cash and cash equivalents	(336)	(166)
Cash and cash equivalents at beginning of period	858	1,462
Cash and cash equivalents at end of period	522	1,296
Total cash and cash equivalents	$ 522	$ 1,296