Consolidated Balance Sheet (Unaudited) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
CURRENT ASSETS:
Cash and cash equivalents	$ 586	$ 134
Receivables, net of allowance	2,560	2,134
Inventories	566	564
Drilling advances	277	259
Prepaid assets and other	587	389
Total current assets	4,576	3,480
Oil and gas, on the basis of full-cost accounting:
Proved properties	63,086	57,904
Unproved properties and properties under development, not being amortized	5,315	5,048
Gathering, transmission and processing facilities	4,684	4,212
Other	675	582
Total property and equipment, gross	73,760	67,746
Less: Accumulated depreciation, depletion and amortization	(32,624)	(29,595)
Total property and equipment, net	41,136	38,151
OTHER ASSETS:
Goodwill	1,032	1,032
Deferred charges and other	738	762
Total Assets	47,482	43,425
CURRENT LIABILITIES:
Accounts payable	852	779
Accrued operating expense	158	163
Accrued exploration and development	1,329	1,367
Accrued compensation and benefits	143	231
Current debt	417	46
Current asset retirement obligation	327	407
Derivative instruments	50	194
Accrued income taxes	267	2
Other	481	335
Total current liabilities	4,024	3,524
LONG-TERM DEBT	6,785	8,095
DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES:
Income taxes	5,535	4,249
Asset retirement obligation	2,603	2,465
Other	632	715
Total deferred credits other noncurrent liabilities	8,770	7,429
COMMITMENTS AND CONTINGENCIES (Note 7)
SHAREHOLDERS' EQUITY:
Preferred stock, no par value, 10,000,000 shares authorized, 6% Cumulative Mandatory Convertible, Series D, $1,000 per share liquidation preference, 1,265,000 shares issued and outstanding	1,227	1,227
Common stock, $0.625 par, 860,000,000 shares authorized, 385,171,811 and 383,668,297 shares issued, respectively	241	240
Paid-in capital	9,017	8,864
Retained earnings	17,388	14,223
Treasury stock, at cost, 1,144,416 and 1,276,555 shares, respectively	(32)	(36)
Accumulated other comprehensive (loss)	62	(141)
Total shareholders' equity	27,903	24,377
Total liabilities and shareholders' equity	$ 47,482	$ 43,425