Losses and Loss Expenses Payable Losses and Loss Expenses Payable (Tables)

3 Months Ended

Mar. 31, 2020

Losses and Loss Expenses Payable [Abstract]

Schedule Of Activity In Liability For Unpaid Losses And Loss Adjustment Expenses Table [Table Text Block]

($ millions)	2020			2019
Losses and loss expenses payable, at beginning of period	$	1,066.5		$	1,146.8
Less: reinsurance recoverable on losses and loss expenses payable	13.6			5.5
Net balance at beginning of period	1,052.9			1,141.3
Incurred related to:
Current year	246.9			215.7
Prior years	(7.5		)	(21.4		)
Total incurred	239.4			194.3
Paid related to:
Current year	74.1			59.3
Prior years	171.3			152.0
Total paid	245.4			211.3
Net balance at end of period	1,046.9			1,124.3
Plus: reinsurance recoverable on losses and loss expenses payable	39.7			4.6
Losses and loss expenses payable, at end of period	$	1,086.6		$	1,128.9