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Schedule VI Supplemental Information for Property-Casualty Insurance Companies
 12 Months Ended
Dec. 31, 2019
SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters [Abstract]  
Schedule VI Supplemental Information for Property-Casualty Insurance Companies
SCHEDULE VI
SUPPLEMENTAL INFORMATION FOR PROPERTY-CASUALTY INSURANCE COMPANIES
(in millions)
 
For the Years Ended December 31,
 
2019
 
2018
 
2017
Deferred acquisition costs
$
160.2

 
$
167.3

 
$
160.4

Reserves for losses and loss adjustment expenses
$
5,157.6

 
$
4,654.6

 
$
4,201.0

Unamortized discount in reserves for losses
$
17.9

 
$
16.9

 
$
17.6

Unearned premiums
$
1,410.9

 
$
1,300.9

 
$
1,207.7

Premiums earned
$
1,729.5

 
$
1,731.7

 
$
1,572.3

Net investment income
$
151.1

 
$
133.1

 
$
140.0

Losses and loss adjustment expenses incurred:
 
 
 
 
 
Current year
$
1,082.6

 
$
1,058.8

 
$
1,058.4

Prior years
138.1

 
(18.0
)
 
(8.2
)
Losses and loss adjustment expenses incurred
$
1,220.7


$
1,040.8


$
1,050.2

Amortization (deferral) of policy acquisition costs (1)
$
12.4

 
$
(9.9
)
 
$
(11.9
)
Paid losses and loss adjustment expenses, net of reinsurance
$
1,030.3

 
$
938.9

 
$
889.4

Gross premiums written
$
3,129.2

 
$
2,955.2

 
$
2,697.2

(1) The amortization (deferral) of policy acquisition costs will not equal the change in the balance sheet. For further discussion, see Note 1, “Business and Significant Accounting Policies.”