Consolidated Balance Sheets (unaudited) (USD $) In Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010
Current assets:
Cash and cash equivalents	$ 4,633	$ 3,951	$ 1,643
Receivables, less allowance for doubtful accounts of $2 and $7	1,696	5,972
Current receivables from related parties	25	58
Inventories	342	3,453
Other current assets	458	395
Total current assets	7,154	13,829
Equity method investments	1,431	1,802
Property, plant and equipment, less accumulated depreciation, depletion and amortization of $16,731 and $19,805	20,318	32,222
Goodwill	537	1,380
Other noncurrent assets	1,101	781
Total assets	30,541	50,014
Current liabilities:
Accounts payable	1,548	8,000
Payables to related parties	14	49
Payroll and benefits payable	129	418
Accrued taxes	1,904	1,447
Deferred income taxes, current	0	324
Other current liabilities	192	580
Long-term debt due within one year	338	295
Total current liabilities	4,125	11,113
Long-term debt	4,705	7,601
Deferred income taxes, noncurrent	2,676	3,569
Defined benefit postretirement plan obligations	667	2,171
Asset retirement obligations	1,337	1,354
Deferred credits and other liabilities, noncurrent	275	435
Total liabilities	13,785	26,243
Commitments and contingencies
Stockholders' Equity
Preferred stock - no shares issued and outstanding (no par value, 26 million shares authorized)	0	0
Common stock issued - 770 million shares (par value $1 per share, 1.1 billion shares authorized)	770	770
Common stock, Securities exchangeable into common stock - no shares issued and outstanding (no par value, 29 million shares authorized)	0	0
Held in treasury, at cost - 66 million and 60 million shares	(2,721)	(2,665)
Additional paid-in capital	6,675	6,756
Retained earnings	12,352	19,907
Accumulated other comprehensive loss	(328)	(997)
Noncontrolling interest	8		0
Total stockholders' equity	16,756	23,771
Total liabilities and stockholders' equity	$ 30,541	$ 50,014