Cash, Cash Equivalents, and Marketable Securities Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash, Cash Equivalents, and Restricted Cash [Abstract]
Cash and cash equivalents	$ 22,935	$ 24,862
Cash, cash equivalents, and restricted cash - held-for-sale (Note 21)	208	248
Total cash, cash equivalents, and restricted cash	$ 23,190	25,110	$ 25,340	$ 20,737
Restricted Cash, Statement of Financial Position [Extensible Enumeration]	Other assets
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations	$ 47	$ 0