Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities:
Net income (loss)	$ (1,113)	$ 500
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	1,795	1,781
Impairments	98	24
Exploratory dry well costs and unproved property impairments	63	85
Net gain on disposal of assets	(8)	(56)
Deferred income taxes	(2)	(34)
Net (gain) loss on derivative instruments	(131)	28
Net settlements of derivative instruments	92	41
Pension and other post retirement benefits, net	(35)	(51)
Stock-based compensation	43	45
Equity method investments, net	189	26
Changes in:
Current receivables	467	(99)
Inventories	(5)	4
Current accounts payable and accrued liabilities	(478)	(164)
Other current assets and liabilities	83	108
All other operating, net	(3)	(189)
Net cash provided by operating activities	1,055	2,049
Investing activities:
Additions to property, plant and equipment	(1,090)	(1,934)
Additions to other assets	15	41
Acquisitions, net of cash acquired	(1)	0
Disposal of assets, net of cash transferred to the buyer	9	(84)
Equity method investments - return of capital	7	51
All other investing, net	0	2
Net cash used in investing activities	(1,060)	(1,924)
Financing activities:
Borrowings	400	0
Purchases of common stock	(92)	(296)
Dividends paid	(40)	(122)
All other financing, net	(2)	(4)
Net cash provided by (used in) financing activities	266	(422)
Net increase (decrease) in cash and cash equivalents	261	(297)
Cash and cash equivalents at beginning of period	858	1,462
Cash and cash equivalents at end of period	$ 1,119	$ 1,165