CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME (LOSS)	$ 894	$ (594)	$ 1,757
ADJUSTMENTS TO RECONCILE NET INCOME (LOSS) TO CASH PROVIDED BY OPERATING ACTIVITIES:
Depreciation, depletion and amortization	2,903	2,811	1,923
Deferred income tax expense (benefit)	526	(427)	1,110
Derivative gains, net	(71)	(926)	(751)
Cash (payments) receipts on derivative settlements, net	(106)	226	725
Stock-based compensation	98	120	153
Net gains on sales of fixed assets	(302)	(267)	(437)
Impairment of natural gas and oil properties	0	3,315	0
Impairments of fixed assets and other	483	316	46
(Gains) losses on investments	229	164	(41)
(Gains) losses on sales of investments	7	(1,092)	0
Losses on purchases of debt and extinguishment of other financing	40	200	5
Restructuring and other termination costs	175	2	0
Other	80	72	(3)
(Increase) decrease in accounts receivable and other assets	5	(68)	(530)
Increase (decrease) in accounts payable, accrued liabilities and other	(347)	(1,015)	1,946
Net Cash Provided By Operating Activities	4,614	2,837	5,903
CASH FLOWS FROM INVESTING ACTIVITIES:
Drilling and completion costs	(5,604)	(8,930)	(7,467)
Acquisitions of proved and unproved properties	(1,032)	(3,161)	(4,974)
Proceeds from divestitures of proved and unproved properties	3,467	5,884	7,651
Additions to other property and equipment	(972)	(2,651)	(2,009)
Proceeds from sales of other assets	922	2,492	1,312
Proceeds from (additions to) investments	(44)	(395)	101
Proceeds from sales of investments	115	2,000	0
Acquisition of drilling company	0	0	(339)
(Increase) decrease in restricted cash	177	(222)	(44)
Other	4	(1)	(43)
Net Cash Used In Investing Activities	(2,967)	(4,984)	(5,812)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from credit facilities borrowings	7,669	20,318	15,509
Payments on credit facilities borrowings	(7,682)	(21,650)	(17,466)
Proceeds from issuance of senior notes, net of discount and offering costs	2,274	1,263	1,614
Proceeds from issuance of term loans, net of discount and offering costs	0	5,722	0
Repayments of Long-term Debt	(2,141)	(4,000)	(2,015)
Cash paid for common stock dividends	(233)	(227)	(207)
Cash paid for preferred stock dividends	(171)	(171)	(172)
Cash paid on financing derivatives	(91)	(37)	1,043
Cash paid to extinguish other financing	(141)	0	0
Cash paid for prepayment of mortgage	(55)	0	0
Proceeds from sales of noncontrolling interests	6	1,077	1,348
Proceeds from other financings	0	257	300
Cash paid to purchase preferred shares of a subsidiary	(212)	0	0
Distributions to noncontrolling interest owners	(215)	(218)	(9)
Other	(105)	(251)	213
Net Cash Provided By (Used In) Financing Activities	(1,097)	2,083	158
Net increase (decrease) in cash and cash equivalents	550	(64)	249
Cash and cash equivalents, beginning of period	287	351	102
Cash and cash equivalents, end of period	837	287	351
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest, net of capitalized interest	(43)	0	0
Income taxes, net of refunds received	26	44	(25)
Change in accrued drilling and completion costs	(63)	(75)	176
Change in accrued acquisitions of proved and unproved properties	(1)	242	81
Change in accrued additions to other property and equipment	$ (81)	$ (25)	$ 64