Information about Segments and Geographic Areas (Stock-based Compensation and Depreciation, Amortization and Impairment by Segment) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Stock-based compensation expense	$ 3,329	$ 2,760	$ 6,519	$ 5,529
Depreciation, amortization and impairment	3,386	2,835	6,494	5,448
Operating Segments | Google
Segment Reporting Information [Line Items]
Stock-based compensation expense	3,126	2,600	6,114	5,212
Depreciation, amortization and impairment	3,292	2,756	6,305	5,285
Operating Segments | Other Bets
Segment Reporting Information [Line Items]
Stock-based compensation expense	136	125	271	248
Depreciation, amortization and impairment	94	79	186	163
Reconciling items
Segment Reporting Information [Line Items]
Stock-based compensation expense	67	35	134	69
Depreciation, amortization and impairment	$ 0	$ 0	$ 3	$ 0