CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME (LOSS)	$ 967	$ (938)
ADJUSTMENTS TO RECONCILE NET INCOME TO CASH PROVIDED BY OPERATING ACTIVITIES:
Depreciation, depletion and amortization	2,179	2,089
Deferred income tax expense (benefit)	585	(623)
Derivative (income) expense	(90)	(828)
Cash (payments) receipts on derivative settlements, net	(91)	388
Stock-based compensation	78	93
Net (gains) losses on sales of fixed assets	(290)	6
Impairment of natural gas and oil properties	0	3,315
Impairments of fixed assets and other	317	256
Losses on investments	30	147
(Gains) losses on sales of investments	7	(1,061)
Losses on purchases of debt	12	0
Impairment of investment	10	0
Restructuring and other termination benefits	164	4
Other	35	76
Changes in assets and liabilities	(352)	(946)
Net Cash Provided By Operating Activities	3,561	1,978
CASH FLOWS FROM INVESTING ACTIVITIES:
Drilling and completion costs	(4,470)	(7,525)
Acquisitions of proved and unproved properties	(811)	(2,813)
Proceeds from divestitures of proved and unproved properties	2,789	2,445
Additions to other property and equipment	(639)	(1,916)
Proceeds from sales of other assets	796	219
Additions to investments	(8)	(261)
Proceeds from sales of investments	115	2,000
(Increase) decrease in restricted cash	177	(280)
Other	4	(23)
Net Cash Used In Investing Activities	(2,047)	(8,154)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from credit facilities borrowings	7,136	13,986
Payments on credit facilities borrowings	(7,268)	(13,614)
Proceeds from issuance of senior notes, net of discount and offering costs	2,274	1,263
Proceeds from issuance of term loans, net of discount and offering costs	0	3,789
Cash paid to purchase debt	(2,116)	0
Cash paid for common stock dividends	(175)	(170)
Cash paid for preferred stock dividends	(128)	(128)
Cash paid on financing derivatives	(62)	(36)
Cash paid for prepayment of mortgage	(55)	0
Proceeds from sales of noncontrolling interests	5	1,056
Proceeds from other financings	22	225
Cash paid to purchase preferred shares of a subsidiary	(212)	0
Distributions to noncontrolling interest owners	(164)	(163)
Other	(71)	(227)
Net Cash Provided By (Used In) Financing Activities	(814)	5,981
Change in cash and cash equivalents classified as current assets held for sale	0	(14)
Net increase (decrease) in cash and cash equivalents	700	(209)
Cash and cash equivalents, beginning of period	287	351
Cash and cash equivalents, end of period	987	142
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest, net of capitalized interest	62	0
Income taxes, net of refunds received	14	31
Change in accrued drilling and completion costs	(97)	(103)
Change in accrued acquisitions of proved and unproved properties	(1)	60
Change in accrued additions to other property and equipment	$ (80)	$ 57