Reinsurance (Tables)

12 Months Ended

Dec. 31, 2020

Reinsurance Disclosures [Abstract]

Effects of Reinsurance

Reinsurance activity related to both our premium income and changes in reserves for future benefits are as follows:

	Year Ended December 31
	2020		2019		2018
	(in millions of dollars)
Direct Premium Income	$	9,621.9	$	9,576.3	$	9,171.1
Reinsurance Assumed	94.1		116.5		142.6
Reinsurance Ceded	(337.9)		(327.2)		(327.6)
Net Premium Income	$	9,378.1	$	9,365.6	$	8,986.1
Ceded Benefits and Change in Reserves for Future Benefits	$	628.8	$	650.1	$	667.2