CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash Flows From Operating Activities
Net income (loss)	$ (2,449)	$ 612
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	877	$ 693
Impairment of natural gas and oil properties	4,374
Amortization of debt issuance cost	50	$ 3
Deferred income taxes	(1,539)	375
Loss on derivatives excluding derivatives, settled	105	7
Stock-based compensation	18	$ 13
(Gain) loss on sale of assets, net	(276)
Other	2	$ (3)
Change in assets and liabilities:
Accounts receivable	175	7
Inventories	2	2
Accounts payable	(55)	52
Taxes payable (receivable)	(43)	1
Interest payable	(1)	(10)
Other assets and liabilities	(13)	22
Net cash provided by operating activities	1,227	1,774
Cash Flows From Investing Activities
Capital investments	(1,392)	(1,511)
Acquisitions	(582)	(202)
Proceeds from sale of property and equipment	704	20
Other	7	6
Net cash used in investing activities	(1,263)	(1,687)
Cash Flows From Financing Activities
Payments on current portion of long-term debt	(1)	(1)
Payments on long-term debt	(500)
Payments on short-term debt	(4,500)
Payments on revolving credit facility	(2,168)	(3,573)
Borrowings under revolving credit facility	2,148	$ 3,429
Payments on commercial paper	(5,179)
Borrowings under commercial paper	5,699
Change in bank drafts outstanding	26	$ 45
Proceeds from issuance of long-term debt	2,200
Debt issuance costs	(17)
Proceeds from exercise of common stock options		10
Proceeds from issuance of common stock	669
Proceeds from issuance of mandatory convertible preferred stock	1,673
Mandatory convertible preferred stock dividend	(52)
Net cash used in financing activities	(2)	(90)
Decrease in cash and cash equivalents	(38)	(3)
Cash and cash equivalents at beginning of year	53	23
Cash and cash equivalents at end of period	$ 15	$ 20