Investments (Schedule of Held-to-Maturity Securities) (Details) - Short-term Investments - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Corporate Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity investment securities	$ 3	$ 12
Fair Value	3	12
Commercial Paper [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity investment securities	6	12
Fair Value	$ 6	$ 12