CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash Flows from Operating Activities
Net income (loss)	$ (275)	$ (998)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Depreciation, depletion, and amortization	1,115	1,149
Deferred income taxes	(660)	(413)
Dry hole expense and impairments of unproved properties	1,012	35
Impairments	373	16
(Gains) losses on divestitures, net	(804)	(2)
Total (gains) losses on derivatives, net	(147)	299
Operating portion of net cash received (paid) in settlement of derivative instruments	(8)	105
Other	83	115
Changes in assets and liabilities
(Increase) decrease in accounts receivable	68	46
Increase (decrease) in accounts payable and other current liabilities	395	(326)
Other items, net	(29)	(163)
Net cash provided by (used in) operating activities	1,123	(137)
Cash Flows from Investing Activities
Additions to properties and equipment	(1,194)	(1,022)
Divestitures of properties and equipment and other assets	2,851	35
Other, net	65	14
Net cash provided by (used in) investing activities	1,722	(973)
Cash Flows from Financing Activities
Borrowings, net of issuance costs	0	4,682
Repayments of debt	(10)	(1,608)
Financing portion of net cash received (paid) for derivative instruments	(37)	(555)
Increase (decrease) in outstanding checks	28	(150)
Dividends paid	(28)	(25)
Repurchase of common stock	(21)	(30)
Issuance of common stock	0	30
Sale of subsidiary units	0	440
Distributions to noncontrolling interest owners	(105)	(78)
Proceeds from conveyance of future hard minerals royalty revenues, net of transaction costs	0	413
Payments of future hard minerals royalty revenues conveyed	(25)	0
Net cash provided by (used in) financing activities	(198)	3,119
Effect of Exchange Rate Changes on Cash	0	(1)
Net Increase (Decrease) in Cash and Cash Equivalents	2,647	2,008
Cash and Cash Equivalents at Beginning of Period	3,184	939
Cash and Cash Equivalents at End of Period	$ 5,831	$ 2,947