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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Allowance for uncollectible accounts $ 486,297 $ 417,406 $ 358,900 $ 224,800
CL&P        
Allowance for uncollectible accounts $ 225,320 $ 181,319 $ 157,400 $ 97,300