Marketable Securities - Current and Non-current (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale
Current marketable securities	$ 73	$ 238
Non-current marketable securities	23	23
Total marketable securities	96	261
Commercial paper
Debt Securities, Available-for-sale
Current marketable securities	0	213
Certificates of deposit/time deposits
Debt Securities, Available-for-sale
Current marketable securities	69	21
U.S. municipal securities
Debt Securities, Available-for-sale
Current marketable securities	4	4
Non-current marketable securities	$ 23	$ 23