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Schedule IV - Reinsurance

12 Months Ended

Dec. 31, 2021

SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]

SCHEDULE IV - REINSURANCE

For the Twelve Months Ended December 31, 2021, 2020 and 2019

Premiums Written


	Direct		Assumed		Ceded		Net Amount
	($ in millions)
2021	$	2,341.4	$	1,597.0	$	(1,350.7)	$	2,587.7
2020(1)	$	2,042.1	$	1,656.4	$	(1,120.7)	$	2,577.8
2019	$	1,956.9	$	1,485.5	$	(1,014.5)	$	2,427.9

Premiums Earned


	Gross Amount		Assumed From Other Companies		Ceded to Other Companies		Net Amount		Percentage of Amount Assumed to Net
	($ in millions, except for percentages)
2021	$	2,139.1	$	1,479.2	$	(1,207.8)	$	2,410.5	61.4	%
2020(1)	$	2,026.4	$	1,612.0	$	(1,110.9)	$	2,527.5	63.8	%
2019	$	1,927.5	$	1,494.9	$	(1,129.1)	$	2,293.3	65.2	%

(1) For the period twelve months ended December 31, 2020 net premiums written and net premiums earned have been corrected downward by $5.1 million for immaterial errors. Refer to Note 26 in these consolidated financial statements, “Correction of Immaterial Errors” for further details