Information about Segments and Geographic Areas - Operating Income (Loss) by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Segment operating income (loss)	$ 28,521	$ 21,343	$ 81,418	$ 60,596
Operating Segments | Google Services
Segment Reporting Information [Line Items]
Segment operating income (loss)	30,856	23,937	88,427	69,128
Operating Segments | Google Cloud
Segment Reporting Information [Line Items]
Segment operating income (loss)	1,947	266	4,019	852
Operating Segments | Other Bets
Segment Reporting Information [Line Items]
Segment operating income (loss)	(1,116)	(1,194)	(3,270)	(3,232)
Reconciling items
Segment Reporting Information [Line Items]
Segment operating income (loss)	$ (3,166)	$ (1,666)	$ (7,758)	$ (6,152)