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Deferred Costs, Capitalized, Prepaid, and Other Assets
 3 Months Ended
Mar. 31, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Deferred Policy Acquisition Costs Deferred Policy Acquisition Costs
The following table presents the balances and changes in Deferred Policy Acquisition Costs for the Life and Health and Property and Casualty business for the three months ended March 31, 2023 and 2022:

March 31, 2023March 31, 2022
Life and HealthProperty and CasualtyTotalLife and HealthProperty and CasualtyTotal
Balance, Beginning of Year$404.5 $231.1 $635.6 $419.3 $268.7 $688.0 
 Capitalizations15.4 149.5 164.9 16.5 165.7 182.2 
 Amortization Expense (5.6)(142.3)(147.9)(7.2)(171.5)(178.7)
 Experience Adjustment(1.1)— (1.1)(1.9)— (1.9)
Balance, End of Period$413.2 $238.3 $651.5 $426.7 $262.9 $689.6 

Costs directly associated with the successful acquisition of business, principally commissions and certain premium taxes and policy issuance costs, are deferred. Costs deferred on property and casualty insurance contracts are amortized over the period in which premiums are earned. Costs deferred on traditional life insurance products and other long-duration insurance contracts are amortized on a constant level basis over the expected life of the contracts in accordance with the assumptions used to estimate the liability for future policyholder benefits for nonparticipating traditional and limited-payment contracts. The underlying assumptions for deferred policy acquisition costs and the liability for future policyholder benefits were updated concurrently.
In the first quarter of 2023, the Company did not make any changes to future assumptions.