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Operating Segments and Geographic Data - Segment Assets (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Segment Assets
Assets	$ 239,948	$ 239,790
Goodwill	4,402	4,402
United States
Segment Assets
Assets	72,078	69,938
International
Segment Assets
Assets	163,468	165,450
Operating Segments
Segment Assets
Assets	230,247	230,895
Operating Segments | Upstream
Segment Assets
Assets	186,390	191,309
Goodwill	4,402	4,402
Operating Segments | Upstream | United States
Segment Assets
Assets	41,944	42,431
Operating Segments | Upstream | International
Segment Assets
Assets	140,044	144,476
Operating Segments | Downstream
Segment Assets
Assets	43,857	39,586
Operating Segments | Downstream | United States
Segment Assets
Assets	25,722	23,490
Operating Segments | Downstream | International
Segment Assets
Assets	18,135	16,096
All Other
Segment Assets
Assets	9,701	8,895
All Other | United States
Segment Assets
Assets	4,412	4,017
All Other | International
Segment Assets
Assets	$ 5,289	$ 4,878

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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