Reinsurance and Catastrophes (Tables)

12 Months Ended

Dec. 31, 2025

Insurance [Abstract]

Schedule of Reinsurance Recoverable on Unpaid Insurance Reserves

The total amounts of reinsurance recoverable on unpaid insurance reserves classified as assets and included in the amounts being reported as Reinsurance balances receivable in the Consolidated Balance Sheets were as follows:

($ in millions)	December 31,
	2025		2024
Reinsurance recoverables on reserves and unpaid claims
Property & Casualty
Reinsurance companies	$	8.0	$	8.3
State insurance facilities	93.2		92.5
Group benefits	278.9		289.3
Life and health	14.9		14.2
Total	$	395.0	$	404.3

Schedule of Effects of Reinsurance on Premiums and Benefits

The effects of reinsurance on premiums written and contract deposits; premiums and contract charges earned; and benefits, claims and settlement expenses were as follows:

($ in millions)	Direct Amount(1)		Ceded to Other Companies		Assumed from Other Companies		Net Amount
Year Ended December 31, 2025
Net premiums written and contract deposits(2)	$	1,734.5	$	59.0	$	34.2	$	1,709.7
Net premiums and contract charges earned	1,258.7		58.3		28.0		1,228.4
Benefits, claims and settlement expenses(3)	744.1		48.1		15.5		711.5
Year Ended December 31, 2024
Net premiums written and contract deposits(2)	$	1,650.9	$	72.0	$	28.8	$	1,607.7
Net premiums and contract charges earned	1,188.8		70.9		28.1		1,146.0
Benefits, claims and settlement expenses(3)	748.3		43.0		39.7		745.0
Year Ended December 31, 2023
Net premiums written and contract deposits(2)	$	1,583.6	$	67.9	$	36.9	$	1,552.6
Net premiums and contract charges earned	1,097.7		76.3		35.7		1,057.1
Benefits, claims and settlement expenses	803.6		45.7		11.2		769.1

(1)    Direct amount is net of the annuity reinsurance agreement accounted for using the deposit method that is discussed in Note 8.

(2)    This measure is not based on accounting principles generally accepted in the United States of America (non-GAAP). An explanation of this non-GAAP measure is contained in the Glossary of Selected Terms included as an exhibit in the Company's reports filed with the SEC.

(3) Includes assumed commercial liability exposures beginning in 2024.