Supplemental Financial Information - Investments (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Summary of Investment Holdings [Line Items]
Long-term Investment Securities	$ 799	$ 766
Equity securities
Summary of Investment Holdings [Line Items]
Long-term Investment Securities	555	558
Other
Summary of Investment Holdings [Line Items]
Long-term Investment Securities	$ 244	$ 208