Overview & Summary of Significant Accounting Policies - Schedule of Net Income per Share of Common Stock Attributable to Common Stockholders (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accounting Policies [Abstract]
Net income attributable to common stockholders	$ 2,167	$ 1,853	$ 4,774	$ 7,069
Less: Buy-out of noncontrolling interest	0	2	(42)	(3)
Net income used in computing basic net income per share of common stock	2,167	1,851	4,816	7,072
Net income used in computing diluted net income per share of common stock	$ 2,167	$ 1,851	$ 4,816	$ 7,072