Allowance for Credit Losses (Tables)

12 Months Ended

Dec. 31, 2021

Credit Loss [Abstract]

Premium Receivable, Allowance for Credit Loss

The following table represents the balances of premiums receivable, net of allowance for uncollectible premiums, including expected credit losses, at December 31, 2021 and January 1, 2021, and the changes in the allowance for the year ended December 31, 2021.

(in millions)	Premiums Receivable, Net of Allowance for Estimated Uncollectible Premiums		Allowance for Estimated Uncollectible Premiums
Balance, January 1, 2021	$	679.8	$	9.4
Current period change for estimated uncollectible premiums			(3.1)
Write-offs of uncollectible premiums receivable			(0.6)
Foreign exchange adjustments			—
Balance, December 31, 2021	$	648.6	$	5.7

Reinsurance Recoverable, Allowance for Credit Loss

Reinsurance Recoverables

The following table presents the balances of reinsurance recoverables, net of the allowance for estimated uncollectible reinsurance, including expected credit losses, at December 31, 2021 and January 1, 2021, and changes in the allowance for estimated uncollectible reinsurance for the year ended December 31, 2021.

(in millions)	Reinsurance Recoverables, Net of Allowance for Estimated Uncollectible Reinsurance		Allowance for Estimated Uncollectible Reinsurance
Balance, January 1, 2021	$	3,009.0	$	4.1
Current period change for estimated uncollectible reinsurance			(0.3)
Write-offs of uncollectible reinsurance recoverables			—
Balance, December 31, 2021	$	2,966.4	$	3.8