Equity - Dividend Restrictions, Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020
Class of Stock [Line Items]
Percent of insurer's policyholder surplus available for dividends	10.00%
Statutory Dividend Payment Restrictions Disclosure	There are no current restrictions on HFSG Holding Company's ability to pay dividends to its stockholders.
HLA
Class of Stock [Line Items]
Proceeds from Dividends Received	$ 300
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval	534
P&C Subsidiaries
Class of Stock [Line Items]
Proceeds from Dividends Received	50
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval	1,600
Mutual Fund [Member]
Class of Stock [Line Items]
Proceeds from Dividends Received	116
Run-Off HFSG Subsidiary [Member]
Class of Stock [Line Items]
Proceeds from Dividends Received	$ 3
Minimum | HLA | Scenario, Forecast
Class of Stock [Line Items]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval		$ 300
Minimum | P&C Subsidiaries | Scenario, Forecast
Class of Stock [Line Items]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval		850
Maximum | HLA | Scenario, Forecast
Class of Stock [Line Items]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval		350
Maximum | P&C Subsidiaries | Scenario, Forecast
Class of Stock [Line Items]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval		$ 900