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Properties, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Properties, Plant and Equipment
Gross Investment at Cost	$ 336,045	$ 345,232
Gross Investment at Cost			$ 326,722
Net Investment	146,961	156,618
Net Investment			150,494
Additions at Cost	7,796	25,546	13,555
Depreciation Expense	17,925	19,508	29,218
Dry hole expense related to prior years expenditures, net	35	709	49
Accretion expense	616	560	628
Impairment charges	414	2,792	10,797
Noble
Properties, Plant and Equipment
Gross Investment at Cost		16,703
Net Investment		16,703
Additions at Cost		16,703
United States
Properties, Plant and Equipment
Gross Investment at Cost	125,010	127,249
Gross Investment at Cost			112,804
Net Investment	48,871	51,192
Net Investment			44,716
Additions at Cost	5,206	13,899	9,527
Depreciation Expense	6,798	8,095	16,334
International
Properties, Plant and Equipment
Gross Investment at Cost	211,035	217,983
Gross Investment at Cost			213,918
Net Investment	98,090	105,426
Net Investment			105,778
Additions at Cost	2,590	11,647	4,028
Depreciation Expense	11,127	11,413	12,884
Australia
Properties, Plant and Equipment
Net Investment	46,395	48,060
Net Investment			51,359
Operating Segments | Upstream
Properties, Plant and Equipment
Gross Investment at Cost	296,150	306,401
Gross Investment at Cost			288,409
Net Investment	130,797	140,185
Net Investment			133,721
Additions at Cost	6,869	24,136	11,415
Depreciation Expense	16,499	17,962	27,840
Operating Segments | Upstream | United States
Properties, Plant and Equipment
Gross Investment at Cost	93,393	96,555
Gross Investment at Cost			82,117
Net Investment	36,027	38,175
Net Investment			31,082
Additions at Cost	4,520	13,067	7,751
Depreciation Expense	5,675	6,841	15,222
Operating Segments | Upstream | International
Properties, Plant and Equipment
Gross Investment at Cost	202,757	209,846
Gross Investment at Cost			206,292
Net Investment	94,770	102,010
Net Investment			102,639
Additions at Cost	2,349	11,069	3,664
Depreciation Expense	10,824	11,121	12,618
Operating Segments | Downstream
Properties, Plant and Equipment
Gross Investment at Cost	35,022	34,492
Gross Investment at Cost			33,448
Net Investment	14,066	14,496
Net Investment			14,512
Additions at Cost	777	1,211	1,807
Depreciation Expense	1,129	1,134	1,125
Operating Segments | Downstream | United States
Properties, Plant and Equipment
Gross Investment at Cost	26,888	26,499
Gross Investment at Cost			25,968
Net Investment	10,766	11,101
Net Investment			11,398
Additions at Cost	543	638	1,452
Depreciation Expense	833	851	869
Operating Segments | Downstream | International
Properties, Plant and Equipment
Gross Investment at Cost	8,134	7,993
Gross Investment at Cost			7,480
Net Investment	3,300	3,395
Net Investment			3,114
Additions at Cost	234	573	355
Depreciation Expense	296	283	256
Segment Reconciling Items
Properties, Plant and Equipment
Gross Investment at Cost	4,873	4,339
Gross Investment at Cost			4,865
Net Investment	2,098	1,937
Net Investment			2,261
Additions at Cost	150	199	333
Depreciation Expense	297	412	253
Segment Reconciling Items | United States
Properties, Plant and Equipment
Gross Investment at Cost	4,729	4,195
Gross Investment at Cost			4,719
Net Investment	2,078	1,916
Net Investment			2,236
Additions at Cost	143	194	324
Depreciation Expense	290	403	243
Segment Reconciling Items | International
Properties, Plant and Equipment
Gross Investment at Cost	144	144
Gross Investment at Cost			146
Net Investment	20	21
Net Investment			25
Additions at Cost	7	5	9
Depreciation Expense	$ 7	$ 9	$ 10

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