Commitments and Contingencies (Details 3)	0 Months Ended			0 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended			12 Months Ended	1 Months Ended			0 Months Ended	32 Months Ended						12 Months Ended	0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended
	Feb. 25, 2013	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Feb. 19, 2013 Consent Decree	Dec. 31, 2013 Nigerian litigation	Dec. 31, 2013 Nigerian litigation Minimum employee	Dec. 31, 2012 Macondo well incident USD ($) claim	Dec. 31, 2013 Macondo well incident USD ($) item claim	Jan. 03, 2013 Macondo well incident USD ($)	Apr. 22, 2010 Macondo well incident mi person	Dec. 31, 2013 Macondo well incident Economic loss item lawsuit	Jan. 31, 2013 Macondo well incident Shareholder derivative claims item	Jun. 30, 2010 Macondo well incident Shareholder derivative claims item	Dec. 15, 2010 Macondo well incident U.S. Department of Justice claims USD ($) bbl	Apr. 20, 2013 Macondo well incident State and other government claims	Apr. 30, 2013 Macondo well incident State and other government claims item	Jun. 21, 2010 Macondo well incident State and other government claims lawsuit	May 05, 2010 Macondo well incident State and other government claims item	Dec. 31, 2013 Macondo well incident Wreck removal USD ($)	Apr. 22, 2010 Macondo well incident Insurance coverage USD ($)	Dec. 31, 2013 Macondo well incident Contractual indemnity USD ($)	Dec. 31, 2013 Macondo well incident Wrongful death and personal injury item	Feb. 14, 2013 Macondo well incident Plea Agreement USD ($) item	Dec. 31, 2013 Macondo well incident Plea Agreement USD ($)	Feb. 19, 2013 Macondo well incident Consent Decree	Dec. 31, 2013 Macondo well incident Consent Decree USD ($)	Feb. 14, 2013 National Fish & Wildlife Foundation Plea Agreement USD ($)	Dec. 31, 2013 National Fish & Wildlife Foundation Plea Agreement USD ($)	Feb. 14, 2013 National Academy of Sciences Plea Agreement USD ($)	Dec. 31, 2013 National Academy of Sciences Plea Agreement USD ($)	Dec. 31, 2013 Asbestos litigation USD ($) plaintiff lawsuit subsidiary	Sep. 30, 2006 Rio de Janeiro tax assessment USD ($) subsidiary	Sep. 30, 2006 Rio de Janeiro tax assessment BRL	Dec. 31, 2010 Brazilian import license assessment USD ($)	Dec. 31, 2010 Brazilian import license assessment BRL	Dec. 31, 2013 Hazardous waste disposal sites plaintiff subsidiary	Dec. 31, 2013 Retained risk USD ($)	Dec. 31, 2013 Letters of credit and surety bonds USD ($)	Dec. 31, 2012 Letters of credit and surety bonds USD ($)
Contingencies
Number of persons declared dead										11
Number of miles Deepwater Horizon was off coast of Louisiana										41
Amount of fines, recoveries and civil penalties							$ 1,900,000,000	$ 464,000,000	$ 1,400,000,000
Outstanding settlement obligations under the Plea Agreement and the Consent Decree, excluding interest
Amount paid for obligations under the Plea Agreement and Consent Decree including interest																								160,000,000		404,000,000
2014								460,000,000																60,000,000		400,000,000
2015								260,000,000																60,000,000		200,000,000
2016								60,000,000																60,000,000
2017								60,000,000																60,000,000
Total settlement obligations								840,000,000																240,000,000		600,000,000
Interest rate on civil penalty obligations (as a percent)																										2.15%
Performance plan approval period																									120 days
Performance period required for termination of decree				5 years
Minimum period for complied terms and provisions																									12 months
Number of subsidiaries that pled guilty to charges																							1
Number of misdemeanor count of negligently discharging oil																							1
Amount of Plea Agreement criminal fine																							100,000,000
Payment of the criminal fine																								100,000,000
Initial payments																												58,000,000		2,000,000
Amount of required payment																											150,000,000		150,000,000
Term of EPA Agreement	5 years
Portion of liability related to the rig explosion and fire incident recoverable from insurance							153,000,000	10,000,000
Number of private civil lawsuits filed							3
Minimum number of litigation risk, if found grossly negligent								3
Number of pending motions								4
Number of actions or claims that were pending								1,400			949											9									21
Number of complaints that involve fatalities																						9
Number of complaints that seek recovery for bodily injuries																						63
Number of putative class action complaints filed alleging, among other things, economic losses as a result of environmental pollution arising out of the Macondo well incident (in lawsuits)											199
Number of classes certified											0
Percentage of non-operating interest of Anadarko in the Macondo well								25.00%
Percentage of non-operating interest of MOEX in the Macondo well								10.00%
Number of shareholders derivative suits													2
Number of plaintiffs who refiled complaint												1
Civil penalties per barrel, Maximum (in dollars per barrel)														1,100
Civil penalties per barrel for gross negligence or willful misconduct, Maximum (in dollars per barrel)														4,300
U.S. government's maximum estimate of barrels of oil discharged and subject to penalties														4,100,000
Number of state, local and foreign governments who have filed lawsuits																200
Number of Gulf Coast states Attorneys General seeking recovery of clean up costs and damages																		5
Number of Atlantic Coast states Attorneys General wanting assurances of financial responsibility for potential damages																	11
Period of statute of limitations															3 years
Percentage of asset value covered																			25.00%
Asset value covered by wreck removal insurance																			140,000,000
Insured status under excess liability insurance program																				950,000,000
Deductible amount under excess liability insurance program																				15,000,000
Amount covered by self insured layer of excess liability insurance program																				50,000,000
Amount covered by first layer of excess liability insurance program																				150,000,000
Amount covered by second layer of excess liability insurance program																				150,000,000
Amount covered by fourth layer of excess liability insurance program																				200,000,000
Amount covered by third layer of excess liability insurance program																				200,000,000
Amount covered by fifth layer of excess liability insurance program																				250,000,000
Amount agreed to indemnify and defend operator of rig																					15,000,000
Number of claimants																															769
Number of pending separate lawsuits remained, each with a single plaintiff																															593
Number of total cases in which there may be a direct or indirect interest regarding asbestos litigation (in lawsuits)																															20
Number of cases being governed for discovery and trial setting and in which the company has interest																															20
Number of cases scheduled for trial in which the company has interest																															2
Number of cases being governed for discovery and trial setting, in which the Company has an interest resolved																															2
Number of cases remaining after resolution, being governed for discovery and trial setting, in which the company has interest																															18
Number of cases in which ruling has now been obtained and the Company cannot be sued for punitive damages																															3
Number of cases gone to trial against defendants who allegedly manufactured or distributed drilling mud additives																															7
Number of cases filed in Louisiana in which subsidiaries of the company are named as defendants																															11
Number of subsidiaries name as defendants for cases filed in Louisiana																															1
Number of cases dismissed through early motions in which subsidiaries of the company were named as defendants																															4
Number of pending claims in which subsidiaries of the company are named as defendants																															7
Number of subsidiaries involved in lawsuits arising from design, construction and refurbishment of major industrial complexes																															1
Number of lawsuits alleging personal injury from asbestos exposure for subsidiary involved in design, construction and refurbishment of major industrial complexes																															879
Estimated number of plaintiffs in lawsuits alleging personal injury from asbestos exposure for subsidiary involved in design, construction and refurbishment of major industrial complexes																															1,819
Insurance limits potentially available for damages in lawsuits regarding personal injury from asbestos exposure for subsidiary involved in design, construction and refurbishment of major industrial																															1,000,000,000
Tax assessment from state tax authorities																																172,000,000	407,000,000	215,000,000	509,000,000
Number of subsidiaries involved in tax assessment relating to import license																																1	1
Total amount of tax assessment from state tax authorities																																		13,000,000	31,000,000
Minimum number of employees for Nigerian company to be required to submit percentage of payroll to ITF on an annual basis						5
Percentage of payroll which employees must remit on annual basis to the ITF					1.00%
Percentage of liability for remediation and related costs																																				8.00%
Number of subsidiaries ordered by California Regional Water Quality Control Board to develop testing plan for Alhambra, California site																																				1
Minimum number of subsidiaries likely to be named potentially responsible party by US Environmental Protection Agency for superfund site (in counts)																																				1
Number of third party filing claims against a subsidiary as a fourth party defendant asserting cost recovery and contribution under CERCLA																																				1
Number of subsidiaries against which a third party filed claims as a fourth party defendant asserting cost recovery and contribution under CERCLA																																				1
Aggregate value of drilling rig fleet		27,200,000,000	29,300,000,000																																		27,200,000,000
Per occurrence insurance deductible on hull and machinery																																					125,000,000
Maximum aggregate insurance deductible on hull and machinery per year																																					200,000,000
Maximum percentage of asset insured value covered by damage mitigation insurance																																					50.00%
Commercial market excess liability coverage																																					820,000,000
Per occurrence deductible on crew personal injury liability and collision liability claims																																					10,000,000
Per occurrence deductible on other third-party non-crew claims																																					5,000,000
Aggregate per occurrence deductible on other third party non-crew claims																																					50,000,000
Liability loss limit for commercial market excess liability coverage																																					870,000,000
Additional insurance that covers expenses that would otherwise be assumed by the well owner																																					100,000,000
Outstanding letters of credit																																						575,000,000	522,000,000
Letters of credit issued under committed and uncommitted credit lines																																						104,000,000	113,000,000
Surety bonds outstanding																																						$ 6,000,000	$ 11,000,000