INFORMATION ABOUT SEGMENTS, REVENUES & GEOGRAPHIC AREAS - Revenues (Details) ₽ in Millions, $ in Millions	12 Months Ended
Dec. 31, 2019 RUB (₽)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 RUB (₽)	Dec. 31, 2017 RUB (₽)
Revenues
Revenues	₽ 175,391	$ 2,224.4	₽ 127,657	₽ 94,054
Taxi
Revenues
Revenues	37,931	481.1	19,213	4,891
Online Advertising Revenues
Revenues
Revenues	121,738	1,543.9	102,737	87,400
Yandex websites
Revenues
Revenues	96,258	1,220.8	78,696	65,149
Yandex ad network websites
Revenues
Revenues	25,480	323.1	24,041	22,251
Other revenues
Revenues
Revenues	₽ 15,722	$ 199.4	₽ 5,707	₽ 1,763

Amount, including 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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration