Policyholder Contract Liabilities - Policyholder Contract Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Investment Holdings [Line Items]
Policyholder Obligations	$ 701.3	$ 504.0
Universal Life-type Policyholder Account Balances
Investment Holdings [Line Items]
Policyholder Obligations	100.3	102.1
United Insurance \| FHLB of Chicago \| FHLB Funding Agreements
Investment Holdings [Line Items]
Policyholder Obligations	$ 601.0	$ 401.9

Carrying value as of the balance sheet date of the sum of the obligations to contract holders to provide to them an agreed upon rate of return pursuant to the terms of the underlying contract. These contracts represent lending by the contract holders to the entity in return for a guaranteed (primarily fixed) interest rate until maturity, unless called earlier if the contracts provide that option to the contract holders (usually institutions). There is little or no insurance risk for the entity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.14)
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant