Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net loss	$ (3,468)	$ (3,589)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation, depletion and amortization	542	930
Asset impairments	3,035	5,460
Deferred income tax benefit	(207)	(2,047)
Derivatives and other financial instruments	194	(430)
Cash settlements on derivatives and financial instruments	(104)	719
Other noncash charges	(67)	225
Net change in working capital	198	215
Change in long-term other assets	53	141
Change in long-term other liabilities	(27)	24
Net cash from operating activities	149	1,648
Cash flows from investing activities:
Capital expenditures	(749)	(1,717)
Acquisitions of property, equipment and businesses	(1,627)	(404)
Divestitures of property and equipment	18	2
Other	(1)	3
Net cash from investing activities	(2,359)	(2,116)
Cash flows from financing activities:
Borrowings of long-term debt, net of issuance costs	396	957
Repayments of long-term debt	(259)	(487)
Net short-term debt borrowings (repayments)	(626)	15
Issuance of common stock	$ 1,469
Sale of subsidiary units		569
Issuance of subsidiary units	$ 727	2
Dividends paid on common stock	(125)	(99)
Distributions to noncontrolling interests	(73)	(53)
Other		(12)
Net cash from financing activities	1,509	892
Effect of exchange rate changes on cash	26	(46)
Net change in cash and cash equivalents	(675)	378
Cash and cash equivalents at beginning of period	2,310	1,480
Cash and cash equivalents at end of period	$ 1,635	$ 1,858