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Reinsurance (Tables)
9 Months Ended
Sep. 30, 2021
Retrocession Arrangements And Reinsurance Ceded Receivables [Abstract]  
Ceded Credit Risk [Table Text Block]
The following table presents information for the Company’s reinsurance ceded receivables and other, including the respective amount and A.M. Best rating for each reinsurer representing in excess of five percent of the total as of September 30, 2021 or December 31, 2020 (dollars in millions):
September 30, 2021December 31, 2020
ReinsurerA.M. Best RatingAmount% of TotalAmount% of Total
Reinsurer AA+$1,634 63.2 %$— — %
Reinsurer BA+412 15.9 420 42.7 
Reinsurer CA+223 8.6 216 22.0 
Reinsurer DA64 2.5 64 6.5 
Reinsurer EA+45 1.7 46 4.7 
Reinsurer FA++44 1.7 55 5.6 
Other reinsurers164 6.4 182 18.5 
Total$2,586 100.0 %$983 100.0 %