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Consolidated Balance Sheet (Unaudited) (Parenthetical) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Accounts receivable - customers, allowance for uncollectible accounts | $ 181 | $ 148
Other receivables, allowance for uncollectible accounts | 7 | 7
Non-utility property, accumulated depreciation | 555 | 522
Intangible assets, accumulated amortization | 254 | 228
CECONY |  |
Accounts receivable - customers, allowance for uncollectible accounts | 171 | 138
Other receivables, allowance for uncollectible accounts | 5 | 4
Non-utility property, accumulated depreciation | $ 25 | $ 25

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