CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flows From Operating Activities
Net loss	$ (2,433)	$ (2,449)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, depletion and amortization	349	877
Impairment of natural gas and oil properties	2,321	4,374
Amortization of debt issuance costs	12	50
Deferred income taxes	(20)	(1,539)
Loss on derivatives, net of settlement	48	105
Stock-based compensation	24	18
(Gain) loss on sale of assets, net		(276)
Restructuring charges	30
Loss on early extinguishment of debt	51
Other	5	2
Change in assets and liabilities:
Accounts receivable	53	175
Accounts payable	(72)	(55)
Taxes payable	(17)	(43)
Interest payable	(14)	(1)
Other assets and liabilities		(11)
Net cash provided by operating activities	337	1,227
Cash Flows From Investing Activities
Capital investments	(391)	(1,392)
Acquisitions		(582)
Proceeds from sale of property and equipment	434	704
Other		7
Net cash provided by (used in) investing activities	43	(1,263)
Cash Flows From Financing Activities
Payments on current portion of long-term debt	(1)	(1)
Payments on long-term debt	(1,175)	(500)
Payments on short-term debt		(4,500)
Payments on revolving credit facility	(3,268)	(2,168)
Borrowings under revolving credit facility	3,152	2,148
Payments on commercial paper	(242)	(5,179)
Borrowings under commercial paper	242	5,699
Change in bank drafts outstanding	(19)	26
Proceeds from issuance of long-term debt	1,191	2,200
Debt issuance costs	(17)	(17)
Proceeds from issuance of common stock	1,247	669
Proceeds from issuance of mandatory convertible preferred stock		1,673
Preferred stock dividend	(27)	(52)
Other	(4)
Net cash provided by (used in) financing activities	1,079	(2)
Increase (decrease) in cash and cash equivalents	1,459	(38)
Cash and cash equivalents at beginning of year	15	53
Cash and cash equivalents at end of period	$ 1,474	$ 15