Property, Plant and Equipment (Details) Boe in Millions, $ in Millions	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) Boe
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 26,737	$ 27,061
LIBYAN ARAB JAMAHIRIYA
Segment Reporting Information [Line Items]
Property, plant and equipment, net	776
Proved Developed and Undeveloped Reserves, Net (BOE) | Boe		235
North America Exploration and Production [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	14,953	$ 15,226
International Exploration and Production [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	2,521	2,533
Oil Sands Mining Segment [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	9,148	9,197
Corporate [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 115	$ 105