Statement of Consolidated Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss) including noncontrolling interest	$ 267	$ (371)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Loss (gain) on divestitures	(341)	1
Exploratory dry hole expense and unproved leasehold impairments	67	71
Depreciation, depletion, and amortization	576	678
Asset retirement obligation accretion	36	38
Impairments	8	0
Deferred income tax provision (benefit)	83	(1)
Other	34	55
Changes in operating assets and liabilities:
Receivables	(41)	135
Inventories	12	10
Drilling advances	(12)	(17)
Deferred charges and other	(10)	(117)
Accounts payable	(56)	(75)
Accrued expenses	(175)	(141)
Deferred credits and noncurrent liabilities	7	(27)
NET CASH PROVIDED BY OPERATING ACTIVITIES	455	239
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property	(322)	(546)
Leasehold and property acquisitions	(49)	(19)
Additions to gas gathering, transmission, and processing facilities	(142)	0
Proceeds from sale of other oil and gas properties	426	0
Other, net	(6)	10
NET CASH USED IN INVESTING ACTIVITIES	(93)	(555)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments on fixed-rate debt	(70)	0
Distributions to noncontrolling interest	(57)	(54)
Dividends paid	(95)	(95)
Other	4	2
NET CASH USED IN FINANCING ACTIVITIES	(218)	(147)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	144	(463)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	1,377	1,467
CASH AND CASH EQUIVALENTS AT END OF PERIOD	1,521	1,004
SUPPLEMENTARY CASH FLOW DATA:
Interest paid, net of capitalized interest	140	141
Income taxes paid, net of refunds	$ 65	$ 84