Income Taxes (Details) (USD $)	12 Months Ended					1 Months Ended	12 Months Ended					12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 US [Member]	Dec. 31, 2013 Equatorial Guinea [Member]	Jul. 31, 2013 Israel [Member]	Dec. 31, 2013 Israel [Member]	Dec. 31, 2013 China [Member]	Dec. 31, 2013 Foreign Loss Carryforward [Member]	Dec. 31, 2012 Foreign Loss Carryforward [Member]	Dec. 31, 2011 Foreign Loss Carryforward [Member]	Dec. 31, 2013 Foreign Tax Credit [Member]	Dec. 31, 2012 Foreign Tax Credit [Member]	Dec. 31, 2013 Capital Loss Carryforward [Member]	Dec. 31, 2012 Capital Loss Carryforward [Member]
Components of income (loss) before income taxes [Abstract]
Domestic	$ 202,000,000	$ 92,000,000	$ (537,000,000)
Foreign	1,142,000,000	1,264,000,000	1,039,000,000
Income from Continuing Operations Before Income Taxes	1,344,000,000	1,356,000,000	502,000,000
Current Taxes [Abstract]
Federal	21,000,000	14,000,000	11,000,000
State	1,000,000	1,000,000	2,000,000
Foreign	144,000,000	143,000,000	155,000,000
Total Current	166,000,000	158,000,000	168,000,000
Deferred Taxes [Abstract]
Federal	96,000,000	60,000,000	(130,000,000)
State	1,000,000	1,000,000	(3,000,000)
Foreign	174,000,000	172,000,000	55,000,000
Total Deferred	271,000,000	233,000,000	(78,000,000)
Total Income Tax Provision	437,000,000	391,000,000	90,000,000
Effective Tax Rate (in hundredths)	32.50%	28.80%	17.90%
Federal statutory tax rate reconciliation [Abstract]
Federal Statutory Rate (in hundredths)	35.00%	35.00%	35.00%
Effect of
Earnings of Equity Method Investees (in hundredths)	(5.30%)	(4.90%)	(13.30%)
State Taxes, Net of Federal Benefit (in hundredths)	0.10%	0.20%	(0.10%)
Difference Between US and Foreign Rates (in hundredths)	(6.30%)	(4.90%)	(7.00%)
Foreign Exploration Loss (in hundredths)	2.70%	(3.80%)	(4.20%)
Change in Valuation Allowance (in hundredths)	3.80%	4.30%	6.60%
Oil Profits Tax - Israel (in hundredths)	0.30%	0.90%	2.60%
Tax Contingency (in hundredths)	0.40%	1.80%	0.00%
Other, Net (in hundredths)	1.80%	0.20%	(1.70%)
Effective Rate (in hundredths)	32.50%	28.80%	17.90%
Deferred Tax Assets [Abstract]
Loss Carryforwards	174,000,000	235,000,000
Employee Compensation & Benefits	143,000,000	134,000,000
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	31,000,000	38,000,000
Other	56,000,000	81,000,000
Total Deferred Tax Assets	404,000,000	488,000,000
Deferred Tax Assets, Valuation Allowance	168,000,000	119,000,000							135,000,000	81,000,000	65,000,000	31,000,000	38,000,000	2,000,000	0
Valuation Allowance Deferred Tax Asset Reversal												27,000,000	57,000,000
Valuation Allowance, Deferred Tax Asset, Recorded During the Year												(20,000,000)	(38,000,000)
Net Deferred Tax Assets	236,000,000	369,000,000
Deferred Tax Liability Release		12,000,000
Deferred Tax Liabilities [Abstract]
Property, Plant and Equipment, Principally Due to Differences in Depreciation, Amortization, Lease Impairment and Abandonments	(2,615,000,000)	(2,481,000,000)
Total Deferred Tax Liability	(2,615,000,000)	(2,481,000,000)
Net Deferred Tax Liability	(2,379,000,000)	(2,112,000,000)
Deferred Tax Asset and Liability Classification [Abstract]
Deferred Income Tax Asset - Current	62,000,000	106,000,000
Deferred Income Tax Liability - Noncurrent	(2,441,000,000)	(2,218,000,000)
Net Deferred Tax Liability	(2,379,000,000)	(2,112,000,000)
Change in Statutory Federal Tax Rate [Abstract]
Statutory Federal Corporate Tax Rate Current Year						25.00%
Statutory Federal Corporate Tax Rate Future Year						26.50%
Impact of Statutory Rate Increase on Deferred Taxes	12,000,000
Accumulated Undistributed Earnings of Foreign Subsidiaries [Abstract]
Accumulated undistributed earnings of foreign subsidiaries	3,700,000,000
Estimated future US taxes on the eventual remittance of accumulated undistributed foreign subsidiary earnings	$ 700,000,000
Earliest Year Open to Examination [Abstract]
Income Tax Examination, Year under Examination				2010	2008		2009	2010