Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating activities:
Net income (loss)	$ (407)	$ (276)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Deferred income taxes	(320)	(179)
Depreciation, depletion and amortization	609	821
Impairments	1	0
Pension and other postretirement benefits, net	14	(7)
Exploratory dry well costs and unproved property impairments	11	67
Net (gain) loss on disposal of assets	60	(1)
Equity method investments, net	30	3
Changes in:
Current receivables, changes in	133	388
Inventories, changes in	7	(22)
Current accounts payable and accrued liabilities, changes in	(121)	(469)
All other operating, net	57	(16)
Net Cash Provided by (Used in) Continuing Operations	74	309
Investing activities:
Additions to property, plant and equipment	(454)	(1,452)
Disposal of assets	17	2
Investments - return of capital	14	10
All other investing, net	2	(2)
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(421)	(1,442)
Financing activities:
Proceeds from Issuance of Common Stock	1,232	0
Dividends paid	(34)	(142)
All other financing, net	0	4
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	1,198	(138)
Effect of Exchange Rate on Cash and Cash Equivalents, Continuing Operations	0	(1)
Net increase (decrease) in cash and cash equivalents	851	(1,272)
Cash and cash equivalents at beginning of period	1,221	2,398
Cash and cash equivalents at end of period	$ 2,072	$ 1,126