Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CASH FLOW FROM OPERATING ACTIVITIES
Net income (loss)	$ (574)	$ (7,829)	$ 630
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Income from discontinued operations	(428)	(317)	(760)
Depreciation, depletion and amortization of assets	4,268	4,544	4,261
Deferred income tax benefit	(517)	(1,372)	(1,178)
Other noncash charges to income	121	159	101
Asset impairments and related items	665	9,684	7,379
Gain on sale of equity investments and other assets	(202)	(101)	(2,505)
Undistributed earnings from equity investments	3	6	38
Dry hole expenses	33	10	99
Changes in operating assets and liabilities:
Decrease (increase) in receivables	(1,091)	1,431	1,413
Decrease (increase) in inventories	17	(24)	(112)
Decrease in other current assets	65	33	89
(Decrease) increase in accounts payable and accrued liabilities	603	(1,989)	(530)
(Decrease) increase in current domestic and foreign income taxes	17	(331)	(54)
Other operating, net	(461)	(650)
Operating cash flow from continuing operations	2,519	3,254	8,871
Operating cash flow from discontinued operations, net of taxes	864	97	2,197
Net cash provided by operating activities	3,383	3,351	11,068
CASH FLOW FROM INVESTING ACTIVITIES
Capital expenditures	(2,717)	(5,272)	(8,930)
Change in capital accrual	(114)	(592)	542
Payments for purchases of assets and businesses	(2,044)	(109)	(1,687)
Sales of equity investments and assets, net	302	819	4,177
Other, net	(169)	(269)	(346)
Investing cash flow from continuing operations	(4,742)	(5,423)	(6,244)
Investing cash flow from discontinued operations			(2,226)
Net cash used by investing activities	(4,742)	(5,423)	(8,470)
CASH FLOW FROM FINANCING ACTIVITIES
Change in restricted cash	1,193	2,826	(4,019)
Special cash distributions from California Resources			6,100
Proceeds from long-term debt	4,203	1,478
Payments of long-term debt	(2,710)		(107)
Proceeds from issuance of common stock	36	37	33
Purchases of treasury stock	(22)	(593)	(2,500)
Contributions from noncontrolling interest			375
Cash dividends paid	(2,309)	(2,264)	(2,210)
Other, net			2
Financing cash flow from continuing operations	391	1,484	(2,326)
Financing cash flow from discontinued operations			124
Net cash provided (used) by financing activities	391	1,484	(2,202)
Increase (decrease) in cash and cash equivalents	(968)	(588)	396
Cash and cash equivalents - beginning of year	3,201	3,789	3,393
Cash and cash equivalents - end of year	$ 2,233	$ 3,201	$ 3,789