Supplemental Financial Information - Long-Term Investments (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Summary of Investment Holdings [Line Items]
Total	$ 818	$ 799
Equity securities
Summary of Investment Holdings [Line Items]
Total	547	555
Other
Summary of Investment Holdings [Line Items]
Total	$ 271	$ 244