Summary of Significant Accounting Policies - Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Cash and cash equivalents	$ 5,904	$ 4,096
Restricted cash and cash equivalents	2,483	1,755
Total cash, cash equivalents and restricted cash and cash equivalents in the consolidated statements of cash flows	$ 8,387	$ 5,851	$ 8,135	$ 5,805