Summary of Significant Accounting Policies - Schedule of Cash and Cash Equivalents and Restricted Cash (Detail) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Accounting Policies [Abstract]
Cash and cash equivalents	$ 16,352	$ 16,139	$ 11,805	$ 16,398
Restricted cash included in prepaid expenses and other current assets	415	494	363	543
Restricted cash included in other non-current assets	483	404	296	248
Total as presented in the consolidated statements of cash flows	$ 17,250	$ 17,037	$ 12,464	$ 17,189