Reinsurance (Tables)

12 Months Ended

Dec. 31, 2019

Insurance [Abstract]

Schedule of Reinsurance Premiums

Premiums were as follows:

	For the Years Ended December 31,
(in millions)	2019			2018			2017
Direct written premiums	$	2,509.5		$	2,293.8		$	2,029.2
Reinsurance ceded to other companies	(1,374.8		)	(1,189.7		)	(1,043.7		)
Reinsurance assumed from other companies	619.7			661.4			668.0
Net written premiums	$	1,754.4		$	1,765.5		$	1,653.5
Direct earned premiums	$	2,411.5		$	2,201.9		$	1,912.2
Reinsurance ceded to other companies	(1,286.0		)	(1,137.9		)	(1,033.6		)
Reinsurance assumed from other companies	604.0			667.7			693.7
Net earned premiums	$	1,729.5		$	1,731.7		$	1,572.3
Percentage of reinsurance assumed to net earned premiums	34.9		%	38.6		%	44.1		%