NATURE OF BUSINESS (Details)	Sep. 30, 2024
Root Insurance Company
Schedule of Equity Method Investments [Line Items]
Ownership percentage (as percent)	100.00%
Root Property & Casualty Insurance Company
Schedule of Equity Method Investments [Line Items]
Ownership percentage (as percent)	100.00%
Root Reinsurance Company, Ltd.
Schedule of Equity Method Investments [Line Items]
Ownership percentage (as percent)	100.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
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-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
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-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

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