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Allowance for Credit Losses
 3 Months Ended
Mar. 31, 2023
Credit Loss [Abstract]  
Allowance for Credit Losses Allowance for Credit Losses
Premiums receivable
The following table represents the balances of premiums receivable, net of allowance for expected credit losses, at March 31, 2023 and December 31, 2022, and the changes in the allowance for expected credit losses for the three months ended March 31, 2023 and the year ended December 31, 2022.
(in millions)Premiums Receivable, Net of Allowance for Estimated Uncollectible PremiumsAllowance for Estimated Uncollectible Premiums
Balance, December 31, 2021$648.6 $5.7 
Current period change for estimated uncollectible premiums0.2 
Write-offs of uncollectible premiums receivable(1.2)
Balance, December 31, 2022$292.0 $4.7 
Current period change for estimated uncollectible premiums0.4 
Write-offs of uncollectible premiums receivable— 
Balance, March 31, 2023$271.1 $5.1 

Reinsurance Recoverables
The following table presents the balances of reinsurance recoverables, net of the allowance for estimated uncollectible reinsurance, at March 31, 2023 and December 31, 2022, and changes in the allowance for estimated uncollectible reinsurance for the three months ended March 31, 2023 and the year ended December 31, 2022.
(in millions) Reinsurance Recoverables, Net of Allowance for Estimated Uncollectible ReinsuranceAllowance for Estimated Uncollectible Reinsurance
Balance, December 31, 2021$2,966.4 $3.8 
Current period change for estimated uncollectible premiums1.7 
Write-offs of uncollectible premiums receivable— 
Reclassified to assets held-for-sale(0.8)
Balance, December 31, 2022$3,029.1 $4.7 
Current period change for estimated uncollectible reinsurance— 
Write-offs of uncollectible reinsurance recoverables— 
Balance, March 31, 2023$3,016.9 $4.7 
We primarily utilize A.M. Best credit ratings when determining the allowance, and adjust as needed based on our historical experience with the reinsurers. A portion of our reinsurance recoverables are collateralized by letters of credit, funds held or trust agreements.