Supplemental Financial Information - Schedule of cash and cash equilvalents (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other Income and Expenses [Abstract]
Cash and cash equivalents	$ 5,243	$ 3,509	$ 3,488
Restricted cash	353	176	320
Restricted cash included in long-term leasehold deposits and other	1	2	2
Total cash, cash equivalents and restricted cash	$ 5,597	$ 3,687	$ 3,810	$ 1,401