NATURE OF BUSINESS	3 Months Ended
Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
NATURE OF BUSINESS	NATURE OF BUSINESSRoot, Inc. is a holding company which, directly or indirectly, maintains 100% ownership of each of its subsidiaries, including, among others, Root Insurance Company, an Ohio-domiciled insurance company, and Root Property & Casualty, a Delaware-domiciled insurance company (together with Root, Inc. “We,” “us” or “our”). We were formed in 2015 and began writing personal auto insurance in July 2016. We are a technology company operating a direct-to-consumer model with more than 75% of our personal insurance customers acquired through mobile applications. We offer auto and renters insurance products underwritten by Root Insurance Company.

The entire disclosure for the nature of an entity's business, major products or services, principal markets including location, and the relative importance of its operations in each business and the basis for the determination, including but not limited to, assets, revenues, or earnings. For an entity that has not commenced principal operations, disclosures about the risks and uncertainties related to the activities in which the entity is currently engaged and an understanding of what those activities are being directed toward.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-URI http://asc.fasb.org/topic&trid=2134479

Name:	us-gaap_NatureOfOperations
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration