Basis of Presentation (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Production Expense
Lease Operating Expense	$ 145		$ 117
Production and Ad Valorem Taxes	49		43
Transportation and Gathering Expense	38		27
Total	232		187
Other Operating (Income) Expense, Net
(Gain) Loss on Divestitures	1		(15)
Other, Net	6		7
Total	7		(8)
Other Non-Operating (Income) Expense, Net
Deferred Compensation (Income) Expense	4	[1]	10	[1]
Other Expense, Net	1		0
Total	5		10
Accounts Receivable, Net
Commodity Sales	403				495
Joint Interest Billings	364				382
Other	111				81
Allowance for Doubtful Accounts	(13)				(11)
Total	865				947
Other Current Assets
Inventories, Materials and Supplies	113				96
Inventories, Crude Oil	24				25
Deferred Income Taxes, Net	38				62
Assets Held-for-Sale	294	[2]			292	[2]
Prepaid Expenses and Other Current Assets	76				72
Total	545				547
Other Noncurrent Assets
Equity Method Investments	464				437
Mutual Fund Investments	116				114
Commodity Derivative Assets	11				16
Other Assets	99				112
Total	690				679
Other Current Liabilities
Production and Ad Valorem Taxes	101				103
Commodity Derivative Liabilities	95				65
Income Taxes Payable	210				156
Asset Retirement Obligations	39				39
Interest Payable	61				63
Current Portion of Long Term Debt	200	[3]			200	[3]
Current Portion of Capital Lease Obligations and Other	55	[3]			58	[3]
Liabilities Associated with Assets Held for Sale	58	[2]			111	[2]
Other	202				193
Total	1,021				988
Other Noncurrent Liabilities
Deferred Compensation Liabilities	263				253
Asset Retirement Obligations	616				547
Accrued Benefit Costs	107				155
Other	186				154
Total	$ 1,172				$ 1,109

[1] Amounts represent increases in the fair value of shares of our common stock held in a rabbi trust.

[2] Assets held for sale as of March 31, 2014 include oil and gas properties located onshore US, offshore Israel, and offshore China. Assets held for sale as of December 31, 2013 include oil and gas properties located onshore US, offshore China, and the North Sea. Liabilities associated with assets held for sale primarily include asset retirement obligations. See Note 3. Divestitures.

[3] See Note 6. Debt.