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Allowance for Expected Credit Losses
9 Months Ended
Sep. 30, 2024
Credit Loss [Abstract]  
Allowance for expected credit losses
Premiums Receivable
The following table provides a roll forward of the allowance for expected credit losses of the Company’s premium receivables:
Premium Receivables, Net of AllowanceAllowance for Expected Credit Losses
Three Months Ended September 30, 2024
Balance at beginning of period$6,268 $36 
Provision on business acquired (1)16 
Change for provision of expected credit losses (2) — 
Balance at end of period$6,364 $52 
Three Months Ended September 30, 2023
Balance at beginning of period$5,296 $34 
Change for provision of expected credit losses (2) — 
Balance at end of period$4,937 $34 
Nine Months Ended September 30, 2024
Balance at beginning of year$4,644 $34 
Provision on business acquired (1)16 
Change for provision of expected credit losses (2)
Balance at end of period$6,364 $52 
Nine Months Ended September 30, 2023
Balance at beginning of year$3,625 $35 
Change for provision of expected credit losses (2)
(1)
Balance at end of period$4,937 $34 
(1)Represents MCE’s provision for current expected credit losses on premiums receivable. See note 2.
(2)Amounts deemed uncollectible are written-off in operating expenses. For the 2024 third quarter and 2023 third quarter, amounts written off were $1 million and nil, respectively. For the nine months ended September 30, 2024 and 2023 period, amounts written off were $1 million and $2 million, respectively.
Reinsurance Recoverables
The following table provides a roll forward of the allowance for expected credit losses of the Company’s reinsurance recoverables:
Reinsurance Recoverables, Net of AllowanceAllowance for Expected Credit Losses
Three Months Ended September 30, 2024
Balance at beginning of period$7,473 $20 
Change for provision of expected credit losses(3)
Balance at end of period$7,948 $17 
Three Months Ended September 30, 2023
Balance at beginning of period$6,717 $22 
Change for provision of expected credit losses
Balance at end of period$6,821 $23 
Nine Months Ended September 30, 2024
Balance at beginning of year$7,064 $21 
Change for provision of expected credit losses(4)
Balance at end of period$7,948 $17 
Nine Months Ended September 30, 2023
Balance at beginning of year$6,564 $22 
Change for provision of expected credit losses
Balance at end of period$6,821 $23 
The following table summarizes the Company’s reinsurance recoverables on paid and unpaid losses (not including ceded unearned premiums):
September 30,
December 31,
20242023
Reinsurance recoverable on unpaid and paid losses and loss adjustment expenses$7,948$7,064
% due from carriers with A.M. Best rating of “A-” or better65.3 %66.8 %
% due from all other rated carriers0.0 %0.1 %
% due from all other carriers with no A.M. Best rating (1)34.7 %33.1 %
Largest balance due from any one carrier as % of total shareholders’ equity7.1 %7.2 %
(1)    At September 30, 2024 and December 31, 2023 over 95% of such amount were collateralized through reinsurance trusts, funds withheld arrangements, letters of credit or other.

Contractholder Receivables
The following table provides a roll forward of the allowance for expected credit losses of the Company’s contractholder receivables:
Contract-holder Receivables, Net of AllowanceAllowance for Expected Credit Losses
Three Months Ended September 30, 2024
Balance at beginning of period$2,016 $
Change for provision of expected credit losses— 
Balance at end of period$2,078 $
Three Months Ended September 30, 2023
Balance at beginning of period$1,761 $
Change for provision of expected credit losses— 
Balance at end of period1,805 $
Nine Months Ended September 30, 2024
Balance at beginning of year$1,814 $
Change for provision of expected credit losses
Balance at end of period$2,078 $
Nine Months Ended September 30, 2023
Balance at beginning of year$1,731 $
Change for provision of expected credit losses— 
Balance at end of period1,805 $