Consolidated Balance Sheet (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Accounts receivable - customers, allowance for uncollectible accounts	$ 63	$ 63
Other receivables, allowance for uncollectible accounts	7	8
Non-utility property, accumulated depreciation	217	201
Intangible assets, accumulated amortization	17	15
CECONY
Accounts receivable - customers, allowance for uncollectible accounts	58	58
Other receivables, allowance for uncollectible accounts	6	7
Non-utility property, accumulated depreciation	$ 25	$ 25