Summary of Significant Accounting Policies - Schedule of Reconciliation of Net Income Used in Computing Basic and Diluted Net Income Per Share of Common Stock and Basic to Diluted Weighted Average Shares Used in Computing Net Income Per Share of Common Stock (Detail) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Net income attributable to common stockholders	$ 2,167	$ 1,478	$ 1,129	$ 7,091	$ 14,997	$ 12,556
Less: Buy-outs of noncontrolling interests				(39)	(2)	(27)
Net income used in computing basic net income per share of common stock				7,130	14,999	12,583
Less: Dilutive convertible debt				0	0	(1)
Net income used in computing diluted net income per share of common stock				$ 7,130	$ 14,999	$ 12,584