Cash, Cash Equivalents, and Marketable Securities Restricted Cash (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents	$ 26,427	$ 25,134
Restricted cash	207	206
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 26,634	$ 25,340	$ 21,721	$ 20,737
Restricted Cash, Statement of Financial Position [Extensible Enumeration]	Other assets