Information about Segments and Geographic Areas (Capital Expenditures 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]
Capital expenditures	$ 5,391	$ 6,126	$ 11,396	$ 10,764
Operating Segments | Google
Segment Reporting Information [Line Items]
Capital expenditures	4,836	6,896	10,499	11,430
Operating Segments | Other Bets
Segment Reporting Information [Line Items]
Capital expenditures	96	65	200	124
Reconciling Items
Segment Reporting Information [Line Items]
Capital expenditures	$ 459	$ (835)	$ 697	$ (790)