CONSOLIDATED BALANCE SHEET (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 318	$ 295
Receivables, net of allowance	2,976	3,079
Inventories	774	655
Drilling advances	573	229
Derivative instruments	104	304
Prepaid assets and other	299	241
Total current assets	5,044	4,803
Oil and gas, on the basis of full-cost accounting:
Proved properties	74,743	67,805
Unproved properties and properties under development, not being amortized	9,196	5,530
Gathering, transmission and processing facilities	5,758	5,175
Other	930	709
Property plant and equipment, gross	90,627	79,219
Less: Accumulated depreciation, depletion and amortization	(39,463)	(33,771)
Property plant and equipment, net	51,164	45,448
OTHER ASSETS:
Goodwill	1,114	1,114
Deferred charges and other	1,488	686
Total Assets	58,810	52,051
CURRENT LIABILITIES:
Accounts payable	1,137	1,048
Current debt	964	431
Current asset retirement obligation	434	447
Derivative instruments	56	113
Other current liabilities	2,799	2,924
Total current liabilities	5,390	4,963
LONG-TERM DEBT	10,670	6,785
DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES:
Income taxes	7,602	7,197
Asset retirement obligation	3,794	3,440
Other	640	673
Total deferred credits other noncurrent liabilities	12,036	11,310
COMMITMENTS AND CONTINGENCIES (Note 8)
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, 392,345,358 and 385,249,885 shares issued, respectively	245	241
Paid-in capital	9,783	9,066
Retained earnings	19,578	18,500
Treasury stock, at cost, 1,072,757 and 1,132,242 shares, respectively	(30)	(32)
Accumulated other comprehensive loss	(89)	(9)
Total shareholders' liabilities	30,714	28,993
Total liabilities and shareholders' equity	$ 58,810	$ 52,051