Summary of Significant Accounting Policies - Schedule of Reconciliation of Basic to Diluted Weighted Average Shares Used in Computing Net Income Per Share of Common Stock Attributable to Common Stockholders (Detail) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accounting Policies [Abstract]
Weighted average shares used in computing net income per share of common stock, basic	1,037	971	1,036	966
Stock-based awards	101	93	103	95
Convertible senior notes	1	10	1	16
Warrants	16	45	16	49
Weighted average shares used in computing net income per share of common stock, diluted	1,155	1,119	1,156	1,126