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Average Annual Payout (Details)
Dec. 31, 2021
Commercial Insurance | Commercial Casualty Line  
Short-duration Insurance Contracts, Historical Claims Duration  
1 7.20%
2 14.40%
3 18.80%
4 18.10%
5 13.20%
6 8.80%
7 4.60%
8 3.40%
9 2.30%
10 1.70%
Commercial Insurance | Workers' Compensation Line  
Short-duration Insurance Contracts, Historical Claims Duration  
1 25.30%
2 25.30%
3 11.60%
4 6.50%
5 3.90%
6 2.30%
7 1.40%
8 1.30%
9 1.30%
10 0.30%
Commercial Insurance | Commercial Auto Line  
Short-duration Insurance Contracts, Historical Claims Duration  
1 40.30%
2 17.70%
3 15.20%
4 9.80%
5 6.70%
Commercial Insurance | Commercial Property Line  
Short-duration Insurance Contracts, Historical Claims Duration  
1 64.40%
2 24.00%
3 3.40%
4 2.20%
5 1.30%
Personal Insurance | Personal Auto  
Short-duration Insurance Contracts, Historical Claims Duration  
1 65.10%
2 16.10%
3 8.30%
4 4.80%
5 2.20%
Personal Insurance | Home Owner Line  
Short-duration Insurance Contracts, Historical Claims Duration  
1 67.60%
2 22.40%
3 4.00%
4 1.20%
5 0.50%
Excess and Surplus Lines Insurance  
Short-duration Insurance Contracts, Historical Claims Duration  
1 13.10%
2 13.90%
3 17.60%
4 15.60%
5 12.30%
6 8.40%
7 4.30%
8 3.00%
9 1.10%
10 0.40%