Investments, Advances And Long-Term Receivables (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Long-Term Investments and Receivables, Net [Abstract]
Investments	$ 34,010	$ 34,080	$ 34,522
Advances, net of allowances of $40 million and $33 million	7,084	7,527
Total equity method company investments and advances	41,094	41,607
Equity securities carried at fair value and other investments at adjusted cost basis	343	177
Long-term receivables and miscellaneous, net of reserves of $2,433 million and $1,966 million	5,763	5,846
Total	47,200	47,630
Advances, allowances	40	33
Reserves for long-term receivables and miscellaneous investments	$ 2,433	$ 1,966