Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH FLOW FROM OPERATING ACTIVITIES
Net income (loss)	$ (522)	$ 4,131	$ 1,311
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Discontinued operations, net	15	0	0
Depreciation, depletion and amortization of assets	5,981	3,977	4,002
Deferred income tax (benefit) provision	(1,027)	371	(719)
Other noncash charges to income	940	34	219
Asset impairments and other charges	1,328	561	545
Gain on sales of equity investments and other assets, net	(622)	(974)	(667)
Undistributed earnings from affiliates	(50)	(43)	(68)
Dry hole expense	89	56	51
Increase in receivables
Increase in receivables	(44)	(740)	(158)
Decrease (increase) in inventories	77	(108)	(349)
Decrease in other current assets	186	94	39
(Decrease) increase in accounts payable and accrued liabilities	793	195	(89)
Increase in current domestic and foreign income taxes	59	38	64
Other operating, net	0	77	680
Operating cash flow from continuing operations	7,203	7,669	4,861
Operating cash flow from discontinued operations, net of taxes	172	0	0
Net cash provided by operating activities	7,375	7,669	4,861
Capital expenditures
Capital expenditures	(6,355)	(4,975)	(3,599)
Change in capital accrual	(282)	55	122
Purchase of businesses and assets, net	(28,088)	(928)	(1,064)
Proceeds from sale of assets and equity investments, net	6,143	2,824	1,403
Equity investments and other, net	(291)	(182)	59
Investing cash flow from continuing operations	(28,873)	(3,206)	(3,079)
Investing cash flow from discontinued operations	(154)	0	0
Net cash used by investing activities	(29,027)	(3,206)	(3,079)
Proceeds from long-term debt, net - Occidental
Proceeds from long-term debt, net	21,557	978	0
Proceeds from issuance of common and preferred stock	10,028	33	28
Purchases of treasury stock	(237)	(1,248)	(25)
Cash dividends paid	(2,624)	(2,374)	(2,346)
Distributions to noncontrolling interest	(257)	0	0
Other financing, net	229	9	0
Financing cash flow from continuing operations	22,196	(3,102)	(2,343)
Financing cash flow from discontinued operations	(3)	0	0
Net cash provided (used) by financing activities	22,193	(3,102)	(2,343)
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents	541	1,361	(561)
Cash and cash equivalents — beginning of year	3,033	1,672	2,233
Cash, cash equivalents, restricted cash and restricted cash equivalents — end of year	3,574	3,033	1,672
WES
Proceeds from long-term debt, net - Occidental
Proceeds from long-term debt, net	1,459	0	0
Payments of long-term debt, net	(1,000)	0	0
Occidental
Proceeds from long-term debt, net - Occidental
Payments of long-term debt, net	$ (6,959)	$ (500)	$ 0