Equity Company Information (Schedule Of Equity Company Financial Summary) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Total revenues	$ 349,585	$ 344,582	$ 413,680
Current assets	91,990	96,609
Total Assets	453,475	376,317	369,067
Current liabilities	70,307	65,316
Net assets	34,010	34,080	34,522
ExxonMobil [Member]
Schedule of Equity Method Investments [Line Items]
Income from equity affiliates	6,095	6,993	11,676
Net assets	32,195	32,988	33,431
Nonconsolidated Investees, Other
Schedule of Equity Method Investments [Line Items]
Income from equity affiliates	21,923	24,595	38,401
Net assets	114,446	115,321	114,994
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Schedule of Equity Method Investments [Line Items]
Total revenues	117,036	132,783	183,812
Income before income taxes	33,357	35,999	61,550
Income taxes	11,434	11,404	23,149
Current assets	50,779	53,081	77,457
Long-term assets	145,671	150,198	153,186
Total Assets	196,450	203,279	230,643
Current liabilities	26,786	30,721	53,640
Long-term liabilities	55,218	57,237	62,009
ExxonMobil [Member]
Schedule of Equity Method Investments [Line Items]
Total revenues	35,532	40,682	57,528
Income before income taxes	9,304	10,078	19,279
Income taxes	3,209	3,085	7,603
Current assets	18,286	18,713	24,994
Long-term assets	39,092	40,986	42,921
Total Assets	57,378	59,699	67,915
Current liabilities	8,699	9,652	15,555
Long-term liabilities	$ 16,484	$ 17,059	$ 18,929