Consolidated Statement of Capitalization - CECONY (Parenthetical) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Nov. 30, 2024	Dec. 31, 2023
Long-term debt		$ 24,710		$ 22,240
CECONY
Long-term debt		23,409		21,060
Debentures
Long-term debt		24,675		21,950
Debentures | CECONY
Long-term debt		23,425		20,825
Tax-Exempt Debt | CECONY
Long-term debt		$ 225		450
Debenture Series 2024C, 4.825% Due 2027 | Debentures | CECONY
Debt instrument, SOFR variable rate		52.00%
Long-term debt	[1]	$ 350		0
Tax Exempt Debt Series 2010A Due 2024 | Tax-Exempt Debt | CECONY
Long-term debt	[2]	$ 0	$ 225	$ 225

[1] (a) Rates reset quarterly; December 31, 2024 floating rate equals SOFR+0.52 percent.

[2] (b) In November 2024, all of the $225 million of Series 2010A tax-exempt bonds issued for the benefit of CECONY, bearing interest at a weekly rate, were redeemed.