Equity Method Investments (Summarized Financial Information For Equity Method Investees) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income statement data:
Revenues and other income	$ 140,412	$ 150,307	$ 179,952
Income from operations	6,796	14,514	21,469
Net income	5,067	11,172	16,050
Balance sheet data – December 31:
Current assets	24,447	32,131
Current liabilities	20,827	20,150
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Income statement data:
Revenues and other income	9,259	6,544	5,069
Income from operations	2,698	2,428	1,907
Net income	2,211	2,089	$ 1,740
Balance sheet data – December 31:
Current assets	2,687	2,610
Noncurrent assets	24,656	21,098
Current liabilities	1,927	1,569
Noncurrent liabilities	$ 7,837	$ 6,719