Revenues (Revenue by Segment) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenue	$ 36,339	$ 31,146
Revenues
Segment Reporting Information [Line Items]
Hedging gains (losses) included in consolidated revenue	137	(239)
Google
Segment Reporting Information [Line Items]
Revenue	5,449	4,354
Google \| Google properties
Segment Reporting Information [Line Items]
Revenue	25,682	21,998
Google \| Google Network Members' properties
Segment Reporting Information [Line Items]
Revenue	5,038	4,644
Google \| Google advertising revenues
Segment Reporting Information [Line Items]
Revenue	30,720	26,642
Other Bets
Segment Reporting Information [Line Items]
Revenue	$ 170	$ 150

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration