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Deferred Costs, Capitalized, Prepaid, and Other Assets (Tables)
 6 Months Ended
Jun. 30, 2024
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Deferred Policy Acquisition Costs
The following table presents the balances and changes in Deferred Policy Acquisition Costs for the Property and Casualty and Life and Health and business for the six months ended June 30, 2024 and 2023:
June 30, 2024June 30, 2023
Property and CasualtyLife and HealthTotalProperty and CasualtyLife and HealthTotal
Balance, Beginning of Year$164.9 $426.7 $591.6 $231.1 $404.5 $635.6 
 Capitalizations246.9 33.7 280.6 294.6 27.7 322.3 
 Amortization Expense (250.5)(10.5)(261.0)(295.7)(9.7)(305.4)
 Experience Adjustment— (3.2)(3.2)— (6.3)(6.3)
Balance, End of Period$161.3 $446.7 $608.0 $230.0 $416.2 $646.2