CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Flows from Operating Activities
Net income (loss)	$ (3,128)	$ (2,360)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Depreciation, depletion, and amortization	2,470	2,172
Deferred income taxes	(1,187)	188
Dry hole expense and impairments of unproved properties	1,040	609
Impairments	2,813	120
(Gains) losses on divestitures, net	425	(1,468)
Total (gains) losses on derivatives, net	(158)	786
Operating portion of net cash received (paid) in settlement of derivative instruments	172	(186)
Other	74	108
Changes in assets and liabilities
(Increase) decrease in accounts receivable	(105)	(183)
Increase (decrease) in accounts payable and accrued expenses	(199)	21
Other items—net	(269)	(27)
Net cash provided by (used in) operating activities	(3,261)	4,191
Cash Flows from Investing Activities
Additions to properties and equipment and dry hole costs	(3,501)	(5,100)
Acquisition of businesses	(3)	(4)
Divestitures of properties and equipment and other assets	700	3,286
Other—net	19	(282)
Net cash provided by (used in) investing activities	(2,785)	(2,100)
Cash Flows from Financing Activities
Borrowings, net of issuance costs	4,787	1,077
Repayments of debt	(3,857)	(1,255)
Financing portion of net cash received (paid) for derivative instruments	(77)	(222)
Increase (decrease) in outstanding checks	(109)	178
Dividends paid	(277)	(230)
Repurchase of common stock	(37)	(35)
Issuance of common stock, including tax benefit on share-based compensation awards	19	73
Distributions to noncontrolling interest owners	(135)	(102)
Net cash provided by (used in) financing activities	849	(424)
Effect of Exchange Rate Changes on Cash	1	0
Net Increase (Decrease) in Cash and Cash Equivalents	(5,196)	1,667
Cash and Cash Equivalents at Beginning of Period	7,369	3,698
Cash and Cash Equivalents at End of Period	2,173	5,365
Deepwater Horizon [Member] | Pending Litigation [Member]
Changes in assets and liabilities
Litigation-related contingent costs	1	92
Tronox Litigation [Member] | Judicial Ruling [Member]
Changes in assets and liabilities
Litigation-related contingent costs	(5,210)	4,319
Subsidiary Equity Transactions [Member]
Cash Flows from Financing Activities
Proceeds from equity issuances	187	92
7.50% Tangible Equity Units [Member]
Cash Flows from Financing Activities
Borrowings, net of issuance costs	98
Proceeds from equity issuances	$ 348	$ 0