Reinsurance and Indemnification- Florida hurricane catastrophe fund (“FHCF”), insurance linked securities (“ILS”) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) reinstatement	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Ceded Credit Risk [Line Items]
Property-liability insurance premiums earned	$ 1,907	$ 1,982	$ 1,154
National General Florida Hurricane Catastrophe Program
Ceded Credit Risk [Line Items]
Reinsurance ceded amount	$ 32
Retention percentage of reinsurance limit	90.00%
Catastrophe Reinsurance Program
Ceded Credit Risk [Line Items]
Retention amount for catastrophe reinsurance agreement contracts	$ 500
Property-liability insurance premiums earned	788	$ 556	$ 425
Traditional market | National General Lender Services Standalone Program
Ceded Credit Risk [Line Items]
Loss from catastrophes	225
Retention amount for catastrophe reinsurance agreement contracts	$ 50
Number of reinstatements each year for each contract | reinstatement	1
Traditional market | National General Reciprocal Excess Catastrophe Reinsurance Contract
Ceded Credit Risk [Line Items]
Loss from catastrophes	$ 690
Retention amount for catastrophe reinsurance agreement contracts	$ 20
Number of reinstatements each year for each contract | reinstatement	1
Traditional market | Catastrophe Reinsurance Program
Ceded Credit Risk [Line Items]
Loss from catastrophes	$ 3,560