Operating Segments and Geographic Data - Segment Assets (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Segment Assets
Assets	$ 251,779	$ 257,709
Goodwill	4,722	4,722
United States
Segment Assets
Assets	90,370	93,783
International
Segment Assets
Assets	156,687	159,204
Operating Segments
Segment Assets
Assets	238,239	236,326
Operating Segments | Upstream
Segment Assets
Assets	183,470	183,105
Goodwill	4,370	4,370
Operating Segments | Upstream | United States
Segment Assets
Assets	45,736	44,246
Operating Segments | Upstream | International
Segment Assets
Assets	133,364	134,489
Operating Segments | Downstream
Segment Assets
Assets	54,769	53,221
Goodwill	352	352
Operating Segments | Downstream | United States
Segment Assets
Assets	33,403	31,676
Operating Segments | Downstream | International
Segment Assets
Assets	21,014	21,193
All Other
Segment Assets
Assets	13,540	21,383
All Other | United States
Segment Assets
Assets	11,231	17,861
All Other | International
Segment Assets
Assets	$ 2,309	$ 3,522