Investments - Other Long-Term Investments (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Schedule of Investments [Line Items]
Other long-term investments	$ 4,685
Real estate investments
Schedule of Investments [Line Items]
Other long-term investments	1,808	$ 1,763
Securities partnerships
Schedule of Investments [Line Items]
Other long-term investments	2,660	$ 2,587
Other
Schedule of Investments [Line Items]
Other long-term investments	$ 217