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Reinsurance (Tables)
 12 Months Ended
Dec. 31, 2023
Reinsurance Disclosures [Abstract]  
Schedule of Effects of Reinsurance

The following table provides the effects of reinsurance.

YEARS ENDED DECEMBER 31

 

2023

 

 

2022

 

 

2021

 

 

(in millions)

 

 

 

 

 

 

 

 

 

 

Premiums written:(1)

 

 

 

 

 

 

 

 

 

 

Direct

 

$

6,411.9

 

 

$

6,024.4

 

 

$

5,310.7

 

 

Assumed

 

 

21.0

 

 

 

56.4

 

 

 

33.6

 

 

Ceded

 

 

(622.7

)

 

 

(604.3

)

 

 

(350.9

)

 

Net premiums written

 

$

5,810.2

 

 

$

5,476.5

 

 

$

4,993.4

 

 

Premiums earned:(1)

 

 

 

 

 

 

 

 

 

 

Direct

 

$

6,255.1

 

 

$

5,817.6

 

 

$

5,131.3

 

 

Assumed

 

 

37.4

 

 

 

47.6

 

 

 

27.7

 

 

Ceded

 

 

(629.4

)

 

 

(612.9

)

 

 

(388.8

)

 

Net premiums earned

 

$

5,663.1

 

 

$

5,252.3

 

 

$

4,770.2

 

 

Percentage of assumed to net premiums earned

 

 

0.7

 

%

 

0.9

 

%

 

0.6

 

%

Losses and LAE:

 

 

 

 

 

 

 

 

 

 

Direct

 

$

4,489.4

 

 

$

3,940.8

 

 

$

3,407.1

 

 

Assumed

 

 

42.5

 

 

 

44.2

 

 

 

17.7

 

 

Ceded(2)

 

 

(397.3

)

 

 

(361.6

)

 

 

(290.6

)

 

Net losses and LAE

 

$

4,134.6

 

 

$

3,623.4

 

 

$

3,134.2

 

 

 

(1)
Direct and ceded premiums written and earned in 2021 were reduced by the $183.2 million MCCA refund of premium, as discussed above.
(2)
The ceded losses and LAE in 2021 were reduced by the decrease in MCCA incurred losses that resulted from Michigan automobile reform, as discussed above.