Oil and Gas Exploration and Production Industries Disclosures (Details) $ in Millions		12 Months Ended
		Dec. 31, 2021 USD ($) MMBoe MMBbls Bcf	Dec. 31, 2021 USD ($) MMBoe Bcf MMBbls	Dec. 31, 2021 USD ($) MMBoe Bcf MMBbls	Dec. 31, 2020 USD ($) MMBoe MMBbls Bcf		Dec. 31, 2019 MMBoe MMBbls Bcf		Dec. 31, 2018 MMBoe MMBbls Bcf
Proved Developed Reserves [Rollforward]
Net proved reserves - end of period		1,548	8,222
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved reserves - end of period | MMBoe				3,747
Net proved developed reserves (MMBOE) | MMBoe		1,948	1,948	1,948	1,649		1,721		1,548
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Balance at January 1 | MMBoe				1,571	1,608		1,380
Extensions and Discoveries | MMBoe				779	456		578
Revisions | MMBoe				(305)	(277)		(50)
Acquisition of Reserves | MMBoe				0	0		2
Sales of Reserves | MMBoe				(3)	(4)		0
Conversion to Proved Developed Reserves | MMBoe				(243)	(212)		(302)
Balance at December 31 | MMBoe				1,799	1,571		1,608
Capitalized Costs, Oil and Gas Producing Activities, Gross [Abstract]
Proved properties | $		$ 64,876	$ 64,876	$ 64,876	$ 61,725
Unproved properties | $		2,768	2,768	2,768	3,068
Total | $		67,644	67,644	67,644	64,793
Accumulated depreciation, depletion and amortization | $		(41,907)	(41,907)	(41,907)	(38,751)
Net capitalized costs | $		$ 25,737	$ 25,737	$ 25,737	$ 26,042
Crude Oil (MMBbl)
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1]	1,514			1,694		1,532
Revisions of previous estimates	[1]	(116)			(225)		(43)
Purchases in place	[1]	2			2		3
Extensions, discoveries and other additions	[1]	312			195		370
Sales in place	[1]	(2)			(3)		(1)
Production	[1]	(162)			(149)		(167)
Net proved reserves - end of period	[1]				1,514		1,694
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved developed reserves		886	886	886	793		801		713
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserves		662	662	662	721		893		819
Natural Gas Liquids (MMBbl)
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1]	813			740		614
Revisions of previous estimates	[1]	(128)			(60)		5
Purchases in place	[1]	3			4		2
Extensions, discoveries and other additions	[1]	194			180		168
Sales in place	[1]	0			(1)		(1)
Production	[1]	(53)			(50)		(48)
Net proved reserves - end of period		829			813	[1]	740	[1]
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved developed reserves		416	416	416	392		387		341
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserves		413	413	413	421		353		273
Natural Gas (Bcf)
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period | Bcf	[2]		5,360		5,370		4,687
Revisions of previous estimates | Bcf	[2]		783		(492)		(134)
Purchases in place | Bcf	[2]		23		26		72
Extensions, discoveries and other additions | Bcf	[2]		2,674		1,132		1,273
Sales in place | Bcf	[2]		(52)		(157)		(15)
Production | Bcf	[2]		(566)		(519)		(513)
Net proved reserves - end of period | Bcf	[2]				5,360		5,370
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved developed reserves | Bcf		3,874	3,874	3,874	2,789		3,194		2,964
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserves | Bcf		4,348	4,348	4,348	2,571		2,176		1,723
Oil Equivalents (MMBoe)
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved reserves - beginning of period | MMBoe	[1]			3,220	3,329		2,928
Revisions of previous estimates | MMBoe	[1]			(114)	(367)		(60)
Purchases in place | MMBoe	[1]			9	10		17
Extensions, discoveries and other additions | MMBoe	[1]			952	564		750
Sales in place | MMBoe	[1]			(11)	(31)		(5)
Production | MMBoe	[1]			(309)	(285)		(301)
Net proved reserves - end of period | MMBoe	[1]				3,220		3,329
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserve (MMBOE) | MMBoe		1,799	1,799	1,799	1,571		1,608		1,380
United States
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved developed reserves (MMBOE) | MMBoe		1,926	1,926	1,926	1,614		1,684		1,503
United States | Crude Oil (MMBbl)
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1]	1,513			1,694		1,532
Revisions of previous estimates	[1]	(116)			(225)		(43)
Purchases in place	[1]	2			2		3
Extensions, discoveries and other additions	[1]	311			194		370
Sales in place	[1]	(2)			(3)		(1)
Production	[1]	(162)			(149)		(167)
Net proved reserves - end of period	[1]	1,546			1,513		1,694
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved developed reserves		886	886	886	792		801		713
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserves		660	660	660	721		893		819
United States | Natural Gas Liquids (MMBbl)
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1]	813			740		614
Revisions of previous estimates	[1]	(128)			(60)		5
Purchases in place	[1]	3			4		2
Extensions, discoveries and other additions	[1]	194			180		168
Sales in place	[1]	0			(1)		(1)
Production	[1]	(53)			(50)		(48)
Net proved reserves - end of period	[1]	829			813		740
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved developed reserves		416	416	416	392		387		341
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserves		413	413	413	421		353		273
United States | Natural Gas (Bcf)
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period | Bcf	[2]		5,043		5,035		4,391
Revisions of previous estimates | Bcf	[2]		754		(498)		(184)
Purchases in place | Bcf	[2]		23		26		72
Extensions, discoveries and other additions | Bcf	[2]		2,574		1,078		1,176
Sales in place | Bcf	[2]		(4)		(157)		(15)
Production | Bcf	[2]		(483)		(441)		(405)
Net proved reserves - end of period | Bcf	[2]		7,907		5,043		5,035
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved developed reserves | Bcf		3,743	3,743	3,743	2,586		2,974		2,699
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserves | Bcf		4,164	4,164	4,164	2,457		2,061		1,692
United States | Oil Equivalents (MMBoe)
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved reserves - beginning of period | MMBoe	[1]			3,166	3,273		2,878
Revisions of previous estimates | MMBoe	[1]			(118)	(368)		(68)
Purchases in place | MMBoe	[1]			9	10		17
Extensions, discoveries and other additions | MMBoe	[1]			934	554		734
Sales in place | MMBoe	[1]			(3)	(31)		(5)
Production | MMBoe	[1]			(295)	(272)		(283)
Net proved reserves - end of period | MMBoe	[1]			3,693	3,166		3,273
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserve (MMBOE) | MMBoe		1,767	1,767	1,767	1,552		1,589		1,375
Trinidad
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved developed reserves (MMBOE) | MMBoe		22	22	22	30		30		38
Trinidad | Crude Oil (MMBbl)
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1]	1			0		0
Revisions of previous estimates	[1]	0			0		0
Purchases in place	[1]	0			0		0
Extensions, discoveries and other additions	[1]	1			1		0
Sales in place	[1]	0			0		0
Production	[1]	0			0		0
Net proved reserves - end of period	[1]	2			1		0
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved developed reserves		0	0	0	1		0		0
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserves		2	2	2	0		0		0
Trinidad | Natural Gas Liquids (MMBbl)
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1]	0			0		0
Revisions of previous estimates	[1]	0			0		0
Purchases in place	[1]	0			0		0
Extensions, discoveries and other additions	[1]	0			0		0
Sales in place	[1]	0			0		0
Production	[1]	0			0		0
Net proved reserves - end of period	[1]	0			0		0
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved developed reserves		0	0	0	0		0		0
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserves		0	0	0	0		0		0
Trinidad | Natural Gas (Bcf)
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period | Bcf	[2]		269		276		237
Revisions of previous estimates | Bcf	[2]		26		5		47
Purchases in place | Bcf	[2]		0		0		0
Extensions, discoveries and other additions | Bcf	[2]		100		54		87
Sales in place | Bcf	[2]		0		0		0
Production | Bcf	[2]		(80)		(66)		(95)
Net proved reserves - end of period | Bcf	[2]		315		269		276
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved developed reserves | Bcf		131	131	131	171		178		224
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserves | Bcf		184	184	184	98		98		13
Trinidad | Oil Equivalents (MMBoe)
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved reserves - beginning of period | MMBoe	[1]			46	46		40
Revisions of previous estimates | MMBoe	[1]			4	1		8
Purchases in place | MMBoe	[1]			0	0		0
Extensions, discoveries and other additions | MMBoe	[1]			18	10		14
Sales in place | MMBoe	[1]			0	0		0
Production | MMBoe	[1]			(14)	(11)		(16)
Net proved reserves - end of period | MMBoe	[1]			54	46		46
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserve (MMBOE) | MMBoe		32	32	32	16		16		2
Other International
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved developed reserves (MMBOE) | MMBoe	[3]	0	0	0	5		7		7
Other International | Crude Oil (MMBbl)
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1],[3]	0			0		0
Revisions of previous estimates	[1],[3]	0			0		0
Purchases in place	[1],[3]	0			0		0
Extensions, discoveries and other additions	[1],[3]	0			0		0
Sales in place	[1],[3]	0			0		0
Production	[1],[3]	0			0		0
Net proved reserves - end of period	[1],[3]	0			0		0
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved developed reserves	[3]	0	0	0	0		0		0
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserves	[3]	0	0	0	0		0		0
Other International | Natural Gas Liquids (MMBbl)
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period	[1],[3]	0			0		0
Revisions of previous estimates	[1],[3]	0			0		0
Purchases in place	[1],[3]	0			0		0
Extensions, discoveries and other additions	[1],[3]	0			0		0
Sales in place	[1],[3]	0			0		0
Production	[1],[3]	0			0		0
Net proved reserves - end of period	[1],[3]	0			0		0
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved developed reserves	[3]	0	0	0	0		0		0
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserves	[3]	0	0	0	0		0		0
Other International | Natural Gas (Bcf)
Proved Developed Reserves [Rollforward]
Net proved reserves - beginning of period | Bcf	[2],[3]		48		59		59
Revisions of previous estimates | Bcf	[2],[3]		3		1		3
Purchases in place | Bcf	[2],[3]		0		0		0
Extensions, discoveries and other additions | Bcf	[2],[3]		0		0		10
Sales in place | Bcf	[2],[3]		(48)		0		0
Production | Bcf	[2],[3]		(3)		(12)		(13)
Net proved reserves - end of period | Bcf	[2],[3]		0		48		59
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved developed reserves | Bcf	[3]	0	0	0	32		42		41
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserves | Bcf	[3]	0	0	0	16		17		18
Other International | Oil Equivalents (MMBoe)
Proved Developed Reserves (MMBoe) [Roll Forward]
Net proved reserves - beginning of period | MMBoe	[1],[3]			8	10		10
Revisions of previous estimates | MMBoe	[1],[3]			0	0		0
Purchases in place | MMBoe	[1],[3]			0	0		0
Extensions, discoveries and other additions | MMBoe	[1],[3]			0	0		2
Sales in place | MMBoe	[1],[3]			(8)	0		0
Production | MMBoe	[1],[3]			0	(2)		(2)
Net proved reserves - end of period | MMBoe	[1],[3]			0	8		10
Net Proved Undeveloped Reserves (MMBOE) [Rollforward]
Net proved undeveloped reserve (MMBOE) | MMBoe	[3]	0	0	0	3		3		3

[1] Million barrels or million barrels of oil equivalent, as applicable; oil equivalents include crude oil and condensate, NGLs and natural gas. Oil equivalents are determined using a ratio of 1.0 barrel of crude oil and condensate or NGLs to 6.0 thousand cubic feet of natural gas.

[2] Billion cubic feet.

[3] Other International includes EOG's China and Canada operations. The China operations were sold in the second quarter of 2021.