Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 257	$ 393
Accounts receivable:
Trade, net	437	431
Due from affiliates	2	3
Income taxes receivable	0	5
Inventories	231	220
Prepaid expenses	13	16
Assets held for sale	554	584
Other current assets:
Derivatives Assets, Current	43	76
Other	5	2
Total current assets	1,542	1,730
Oil and gas properties, using the successful efforts method of accounting:
Proved properties	13,909	13,406
Unproved properties	116	123
Accumulated depletion, depreciation and amortization	(5,035)	(4,903)
Total property, plant and equipment	8,990	8,626
Goodwill	274	274
Other property and equipment, net	1,225	1,224
Other assets:
Investment in unconsolidated affiliate	239	225
Derivative Assets, Noncurrent	62	91
Other, net	133	124
Assets, Total	12,465	12,294
Accounts payable:
Trade	925	910
Due to affiliates	46	150
Interest payable	36	62
Income taxes payable	9	0
Deferred Tax Liabilities, Net, Current	20	19
Liabilities held for sale	93	39
Other current liabilities:
Derivative Liabilities, Current	41	12
Other	68	58
Total current liabilities	1,238	1,250
Long-term Debt, Excluding Current Maturities	2,706	2,653
Derivative Liabilities, Noncurrent	5	10
Deferred income taxes	1,496	1,473
Other liabilities	296	293
Stockholders' equity:
Common stock, $.01 par value	1	1
Additional paid-in capital	5,105	5,080
Treasury stock at cost	(173)	(144)
Retained earnings	1,782	1,665
Total equity attributable to common stockholders	6,715	6,602
Noncontrolling interests in consolidating subsidiaries	9	13
Total equity	6,724	6,615
Commitments and contingencies
Liabilities and Stockholders' Equity, Total	$ 12,465	$ 12,294