CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current Assets
Cash and cash equivalents	$ 3,735	$ 2,471
Accounts receivable (net of allowance of $5 million and $7 million)
Customers	1,511	1,473
Others	1,249	1,274
Algeria exceptional profits tax settlement	280	730
Other current assets	535	847
Total	7,310	6,795
Properties and Equipment
Cost	65,160	63,598
Less accumulated depreciation, depletion, and amortization	26,190	25,200
Net properties and equipment	38,970	38,398
Other Assets	1,630	1,716
Goodwill and Other Intangible Assets	5,678	5,680
Total Assets	53,588	52,589
Current Liabilities
Accounts payable	2,909	2,989
Current asset retirement obligations	387	298
Accrued expenses	776	707
Total	4,072	3,994
Long-term Debt	13,663	13,269
Other Long-term Liabilities
Deferred income taxes	8,964	8,759
Asset retirement obligations	1,519	1,587
Other	3,040	3,098
Total	13,523	13,444
Stockholders' equity
Common stock, par value $0.10 per share (1.0 billion shares authorized, 519.9 million and 518.6 million shares issued)	52	51
Paid-in capital	8,282	8,230
Retained earnings	14,243	13,829
Treasury stock (18.5 million and 18.1 million shares)	(868)	(841)
Accumulated other comprehensive income (loss)	(619)	(640)
Total Stockholders' Equity	21,090	20,629
Noncontrolling interests	1,240	1,253
Total Equity	22,330	21,882
Total Liabilities and Equity	$ 53,588	$ 52,589