CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash Flows from Operating Activities
Net income (loss)	$ 1,443	$ 2,113
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation, depletion, and amortization	1,962	1,957
Deferred income taxes	563	143
Dry hole expense and impairments of unproved properties	263	1,187
Impairments	39	162
(Gains) losses on divestitures, net	(157)	29
Unrealized (gains) losses on derivatives, net	(395)	83
Other	121	120
Changes in assets and liabilities
Deepwater Horizon settlement and related costs	1	24
Algeria exceptional profits tax settlement	698	(1,691)
Tronox-related contingent loss		(250)
(Increase) decrease in accounts receivable	257	351
Increase (decrease) in accounts payable and accrued expenses	221	(486)
Other items—net	(11)	148
Net cash provided by (used in) operating activities	5,005	3,890
Cash Flows from Investing Activities
Additions to properties and equipment and dry hole costs	(3,531)	(3,553)
Acquisition of midstream business	(135)
Divestitures of properties and equipment and other assets	418	258
Other—net	(341)	(112)
Net cash provided by (used in) investing activities	(3,589)	(3,407)
Cash Flows from Financing Activities
Borrowings, net of issuance costs	495	886
Repayments of debt	(245)	(1,305)
Increase (decrease) in outstanding checks	145	(39)
Dividends paid	(92)	(91)
Repurchase of common stock	(30)	(23)
Issuance of common stock, including tax benefit on stock option exercises	95	38
Sale of subsidiary units	415	212
Distributions to noncontrolling interest owners	(68)	(52)
Contributions from noncontrolling interest owners	1	11
Net cash provided by (used in) financing activities	716	(363)
Effect of Exchange Rate Changes on Cash	(22)	(23)
Net Increase (Decrease) in Cash and Cash Equivalents	2,110	97
Cash and Cash Equivalents at Beginning of Period	2,471	2,697
Cash and Cash Equivalents at End of Period	$ 4,581	$ 2,794