Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
CURRENT ASSETS
Cash and cash equivalents	$ 1,592	$ 3,781
Trade receivables, net of reserves of $16 in both 2012 and 2011	4,916	5,395
Inventories	1,344	1,069
Other current assets	1,640	1,297
Total current assets	9,492	11,542
INVESTMENTS IN UNCONSOLIDATED ENTITIES	1,894	2,072
PROPERTY, PLANT AND EQUIPMENT
Oil and gas segment	65,417	56,682
Chemical segment	6,054	5,715
Midstream, marketing and other segment	7,191	5,664
Corporate	1,434	1,310
GROSS PROPERTY, PLANT AND EQUIPMENT	80,096	69,371
Accumulated depreciation, depletion and amortization	(28,032)	(23,687)
TOTAL PROPERTY, PLANT AND EQUIPMENT	52,064	45,684
LONG-TERM RECEIVABLES AND OTHER ASSETS, NET	760	746
TOTAL ASSETS	64,210	60,044
CURRENT LIABILITIES
Current maturities of long-term debt	600
Accounts payable	4,708	5,304
Accrued liabilities	1,966	2,533
Domestic and foreign income taxes	16	110
Total current liabilities	7,290	7,947
LONG-TERM DEBT, NET	7,023	5,871
DEFERRED CREDITS AND OTHER LIABILITIES
Deferred domestic and foreign income taxes	6,039	4,846
Other	3,810	3,760
Total deferred credits and other liabilities	9,849	8,606
CONTINGENT LIABILITIES AND COMMITMENTS
STOCKHOLDERS' EQUITY
Common stock, $0.20 par value, authorized 1.1 billion shares, outstanding shares: 2012 - 888,801,436 and 2011 - 886,808,654	178	177
Treasury stock: 2012 - 83,287,187 shares and 2011 - 75,799,573 shares	(5,091)	(4,502)
Additional paid-in capital	7,441	7,286
Retained earnings	37,990	35,142
Accumulated other comprehensive loss	(502)	(483)
Total equity attributable to common stock	40,016	37,620
Noncontrolling interest	32
Total equity	40,048	37,620
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 64,210	$ 60,044