Reinsurance - Components of Net Realized Capital Gains (Losses) on Funds Withheld Assets (Details) - Talcott Life & Annuity Re $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Reinsurance
Net realized capital losses	$ (55.4)
Fixed maturities, available-for-sale
Reinsurance
Net realized capital losses	(57.0)
Fixed maturities, trading
Reinsurance
Net realized capital losses	(0.1)
Equity securities
Reinsurance
Net realized capital losses	(1.2)
Derivatives
Reinsurance
Net realized capital losses	$ 2.9