December 31, 2022 December 31, 2021 Valuation Net Reinsurance allowance Recoverable Valuation allowance 17,128 $ 1,773 289 $ 62 16,184 $ 271 1,182 58 $ 18,901 $ 351 $ 17,366 $ 329 (in millions of U.S. dollars) Net Reinsurance Recoverable Reinsurance recoverable on unpaid losses and loss expenses $ Reinsurance recoverable on paid losses and loss expenses Reinsurance recoverable on losses and loss expenses Year Ended December 31 (in millions of U.S. dollars) Valuation allowance for uncollectible reinsurance - beginning of period Provision for uncollectible reinsurance Write-offs charged against the valuation allowance 2022 2021 329 $ 314 43 66 (19) (50) Foreign exchange revaluation (2) (1) Valuation allowance for uncollectible reinsurance - end of period $ 351 $ 329