INVESTMENTS AND RELATED-PARTY TRANSACTIONS (Details) - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2023
Equity Method Investments
Equity method investment amounts		$ 3,224	$ 3,176
Deferred credits and other liabilities		15,975	15,097
Dividends received as return on investment		708	643	$ 652
Cumulative undistributed earnings		613	594
Excess of investments in equity investees over the underlying equity in net assets		424
Excess of investments in equity investees over the underlying equity in net assets, which represents goodwill		371
Summarized Results of Operations
Revenues and other income		28,918	37,095	26,314
Costs and expenses		23,023	24,088	23,362
NET INCOME		4,696	13,304	2,322
Summarized Balance Sheet
Current assets		8,375	8,886
Current liabilities		9,148	7,757
Long-term debt	[1]	18,536	19,670
Other non-current liabilities		15,975	15,097
Equity		30,250	30,085
RELATED-PARTY TRANSACTIONS
Sales		28,257	36,634	25,956
Purchases		722	948	773
Services		1,155	1,006	942
Advances and amounts due from related parties		3,195	4,281
Amounts due to related parties		3,646	4,029
Related Party
RELATED-PARTY TRANSACTIONS
Sales		256	337	261
Advances and amounts due from related parties		62	40	57
Amounts due to related parties		371	306	280
Equity Method Investment, Nonconsolidated Investee
Equity Method Investments
Deferred credits and other liabilities		2,396	1,289	1,187
Summarized Results of Operations
Revenues and other income		4,724	6,342	6,252
Costs and expenses		3,753	4,514	4,569
NET INCOME		971	1,828	1,683
Summarized Balance Sheet
Current assets		4,772	3,482	3,387
Non-current assets		18,715	15,282	19,341
Current liabilities		2,547	1,342	1,976
Long-term debt		9,673	9,512	9,464
Other non-current liabilities		2,396	1,289	1,187
Equity		8,870	$ 6,621	$ 10,101
WES
Equity Method Investments
Equity method investment amounts		$ 1,928
Equity method investment ownership percentage		51.00%
RELATED-PARTY TRANSACTIONS
Sales to related party (as a percent)		37.00%	42.00%	58.00%
Purchases from related party (as a percent)		22.00%	24.00%	27.00%
OxyChem Ingleside Facility
Equity Method Investments
Equity method investment amounts		$ 539
Equity method investment ownership percentage		50.00%
NET Power
Equity Method Investments
Equity method investment amounts		$ 495			$ 351
Equity method investment ownership percentage		42.20%			42.20%
DEL
Equity Method Investments
Equity method investment amounts		$ 0
Equity method investment ownership percentage		24.50%
Deferred credits and other liabilities		$ 252
Summarized Balance Sheet
Other non-current liabilities		252
Other
Equity Method Investments
Equity method investment amounts		$ 262
Ingleside Ethylene LLC
RELATED-PARTY TRANSACTIONS
Purchases from related party (as a percent)		69.00%	64.00%	70.00%
WES | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Equity Method Investments
Number of shares sold (in shares)		5.1	10.0	14.0
Gain on sale		$ 51	$ 62	$ 102

[1] Included $591 million and $546 million of finance lease liabilities as of December 31, 2023 and 2022, respectively.