Operating Segments and Geographic Data (Details 3) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Segment Assets
Segment Assets	$ 236,677	$ 237,428
Goodwill	4,454	4,463
United States
Segment Assets
Segment Assets	66,194	64,598
International
Segment Assets
Segment Assets	166,029	168,367
Operating Segments
Segment Assets
Segment Assets	224,609	228,189
Operating Segments | Upstream
Segment Assets
Segment Assets	184,207	186,037
Goodwill	4,454	4,463
Operating Segments | Upstream | United States
Segment Assets
Segment Assets	35,974	35,926
Operating Segments | Upstream | International
Segment Assets
Segment Assets	143,779	145,648
Operating Segments | Downstream
Segment Assets
Segment Assets	40,402	42,152
Operating Segments | Downstream | United States
Segment Assets
Segment Assets	24,532	25,197
Operating Segments | Downstream | International
Segment Assets
Segment Assets	15,870	16,955
All Other
Segment Assets
Segment Assets	12,068	9,239
All Other | United States
Segment Assets
Segment Assets	5,688	3,475
All Other | International
Segment Assets
Segment Assets	$ 6,380	$ 5,764