Liabilities for Outstanding Claims, Losses and Loss Adjustment Expenses (Tables)

3 Months Ended

Mar. 31, 2021

Insurance [Abstract]

Schedule of Liability for Unpaid Losses and Loss Adjustment Expenses

The table below provides a reconciliation of the gross beginning and ending reserve for unpaid losses and loss adjustment expenses.

	Three Months Ended
	March 31,
(in millions)	2021			2020
Gross reserve for losses and LAE, beginning of period	$	6,024.0		$	5,654.4
Reinsurance recoverable on unpaid losses		1,641.6			1,574.8
Net reserve for losses and LAE, beginning of period		4,382.4			4,079.6
Net incurred losses and LAE in respect of losses occurring in:
Current year		789.5			730.2
Prior years		(8.2	)		(2.0	)
Total incurred losses and LAE		781.3			728.2
Net payments of losses and LAE in respect of losses occurring in:
Current year		178.5			174.6
Prior years		435.0			484.4
Total payments		613.5			659.0
Net reserve for losses and LAE, end of period		4,550.2			4,148.8
Reinsurance recoverable on unpaid losses		1,673.5			1,576.1
Gross reserve for losses and LAE, end of period	$	6,223.7		$	5,724.9