Investments - Carrying Values of Other Long-Term Investments (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Schedule of Investments [Line Items]
Other long-term investments	$ 3,936	$ 3,728
Real estate investments
Schedule of Investments [Line Items]
Other long-term investments	1,434	1,319
Securities partnerships
Schedule of Investments [Line Items]
Other long-term investments	2,259	2,166
Other
Schedule of Investments [Line Items]
Other long-term investments	$ 243	$ 243