Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities:
Net income (loss)	$ (577)	$ (662)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Deferred income taxes	(392)	(185)
Depreciation, depletion and amortization	1,170	1,572
Impairments	1	44
Net (gain) loss on derivative instruments	88	17
Net cash received (paid) in settlement of derivative instruments	46	4
Pension and other postretirement benefits, net	14	14
Exploratory dry well costs and unproved property impairments	166	148
Net (gain) loss on disposal of assets	(234)	(1)
Equity method investments, net	22	37
Changes in:
Current receivables, changes in	88	534
Inventories, changes in	30	21
Current accounts payable and accrued liabilities, changes in	(211)	(770)
All other operating, net	41	(56)
Net cash provided by operating activities	252	717
Investing activities:
Additions to property, plant and equipment	(753)	(2,320)
Disposal of assets	758	2
Investments - return of capital	37	31
Purchases of short-term investments	0	925
Deposit for acquisition	89	0
All other investing, net	2	(1)
Net cash used in investing activities	(45)	(3,213)
Financing activities:
Borrowings	0	1,996
Debt issuance costs	0	19
Debt repayments	0	34
Common stock issuance	1,236	0
Dividends paid	(77)	(285)
All other financing, net	0	11
Net cash provided by (used in) financing activities	1,159	1,669
Effect of Exchange Rate on Cash and Cash Equivalents, Continuing Operations	(3)	1
Net increase (decrease) in cash and cash equivalents	1,363	(826)
Cash and cash equivalents at beginning of period	1,221	2,398
Cash and cash equivalents at end of period	$ 2,584	$ 1,572