Other Contingencies and Commitments (Details)		12 Months Ended
	Nov. 07, 2011 bbl	Dec. 31, 2015 USD ($) Location	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Aug. 27, 2015 Employee	Mar. 14, 2012 Employee	Dec. 31, 2009 USD ($)
Guarantees
Guarantee for payments under terminal use agreements		$ 447,000,000
Term of guarantee for payments under terminal use agreement (in years)		12 years
Idemnifications
Indemnifications acquirer environmental liabilities, maximum obligation							$ 200,000,000
Long-Term Unconditional Purchase Obligations and Commitments, Including Throughput and Take-or-Pay Agreements
Long term unconditional purchase obligations and commitments, including throughout and take or pay agreements in 2016		$ 2,100,000,000
Long term unconditional purchase obligations and commitments, including throughout and take or pay agreements in 2017		1,900,000,000
Long term unconditional purchase obligations and commitments, including throughout and take or pay agreements in 2018		1,700,000,000
Long term unconditional purchase obligations and commitments, including throughout and take or pay agreements in 2019		1,500,000,000
Long term unconditional purchase obligations and commitments, including throughout and take or pay agreements in 2020		1,100,000,000
Long term unconditional purchase obligations and commitments, including throughout and take or pay agreements in 2020 and after		3,100,000,000
Total payments under long term unconditional purchase obligations and commitments including throughput and Take-or-Pay agreements		1,900,000,000	$ 3,700,000,000	$ 3,600,000,000
Environmental
Environmental reserve balance		$ 1,578,000,000
Sites with potential remediation activities | Location		163
Criminal charges, number of employees charged | Employee						11
Dismissal of charges, number of employees | Employee					11
BRAZIL
Environmental
Emitted of barrels of oil | bbl	2,400
Upstream [Member]
Environmental
Environmental reserve		$ 323,000,000
U.S. Downstream [Member]
Environmental
Environmental reserve		845,000,000
International Downstream [Member]
Environmental
Environmental reserve		58,000,000
Other Businesses [Member]
Environmental
Environmental reserve		4,000,000
Sites with Potential Remediation Activities [Member]
Environmental
Environmental reserve		348,000,000
Environmental Reserve Less Environmental Reserve for Sites with Potential Remediation Activities [Member]
Environmental
Environmental reserve		$ 1,230,000,000