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NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Allowance for uncollectible accounts | $ 417,406 | $ 358,851 | $ 224,800
NSTAR Electric Company |  |  |
Allowance for uncollectible accounts | $ 97,005 | $ 91,583 | $ 75,400

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