Summary of Significant Accounting Policies - Schedule of Cash and Cash Equivalents and Restricted Cash (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Cash and cash equivalents	$ 11,805	$ 16,398	$ 16,048	$ 16,253
Restricted cash included in prepaid expenses and other current assets	363	543	486	294
Restricted cash included in other non-current assets	296	248	236	377
Total as presented in the consolidated statements of cash flows	$ 12,464	$ 17,189	$ 16,770	$ 16,924