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