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Consolidated Statement of Capitalization - Long-term Debt - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Unamortized debt expense |  | $ (179) | $ (162)
Unamortized debt discount |  | (70) | (60)
TOTAL |  | 24,710 | 22,240
Less: Long-term debt due within one year |  | 0 | 251
TOTAL LONG-TERM DEBT |  | 24,710 | 21,989
Less: Held for sale project debt, net |  | 59 | 62
TOTAL LONG-TERM DEBT EXCLUDING HELD FOR SALE |  | 24,651 | 21,927
TOTAL CAPITALIZATION |  | $ 46,613 | 43,085
Broken Bow II |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate | [1] | 4.82% |
TOTAL PROJECT DEBT | [1] | $ 59 | 62
Project Debt |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
TOTAL PROJECT DEBT |  | 59 | 62
Debentures |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
TOTAL |  | $ 24,675 | 21,950
Debentures | Debenture 2014B, 3.30 Percent, Due 2024 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.30% |
TOTAL |  | $ 0 | 250
Debentures | Debenture Series 2016B, 2.90% Due 2026 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 2.90% |
TOTAL |  | $ 250 | 250
Debentures | Debenture Series 1997F, 6.50% Due 2027 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 6.50% |
TOTAL |  | $ 80 | 80
Debentures | Debenture Series 2017B, 3.125% Due 2027 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.125% |
TOTAL |  | $ 350 | 350
Debentures | Debenture Series 2017B, 4.825% Due 2027 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate | [2] | 4.825% |
TOTAL | [2] | $ 350 | 0
Debentures | Debenture Series 2018A, 3.80% Due 2028 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.80% |
TOTAL |  | $ 300 | 300
Debentures | Debenture Series 2018D, 4.00% Due 2028 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 4.00% |
TOTAL |  | $ 500 | 500
Debentures | Debenture 2019B, 2.94 Percent, Due 2029 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 2.94% |
TOTAL |  | $ 44 | 44
Debentures | Debenture 2020A, 3.35 Percent, Due 2030 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.35% |
TOTAL |  | $ 600 | 600
Debentures | Debenture 2020A, 2.02 Percent, Due 2030 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 2.02% |
TOTAL |  | $ 35 | 35
Debentures | Debenture 2021A, 2.40 Percent, Due 2031 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 2.40% |
TOTAL |  | $ 900 | 900
Debentures | Debenture 2021A, 2.31 Percent, Due 2031 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 2.31% |
TOTAL |  | $ 45 | 45
Debentures | Debenture 2022A, 5.70 Percent, Due 2032 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.70% |
TOTAL |  | $ 100 | 100
Debentures | Debenture Series 2003A, 5.875% Due 2033 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.875% |
TOTAL |  | $ 175 | 175
Debentures | Debenture Series 2003C, 5.10% Due 2033 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.10% |
TOTAL |  | $ 200 | 200
Debentures | Debenture Series 2023A, 5.20% Due 2033 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.20% |
TOTAL |  | $ 500 | 500
Debentures | Debenture Series 2004B, 5.70% Due 2034 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.70% |
TOTAL |  | $ 200 | 200
Debentures | Debenture Series 2023B, 5.50% Due 2034 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.50% |
TOTAL |  | $ 600 | 600
Debentures | Debenture 2024A, 5.375 Percent, Due 2034 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.375% |
TOTAL |  | $ 400 | 0
Debentures | Debenture Series 2005A, 5.30% Due 2035 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.30% |
TOTAL |  | $ 350 | 350
Debentures | Debenture Series 2005 B 5.25% Due 2035 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.25% |
TOTAL |  | $ 125 | 125
Debentures | Debenture Series 2024 D 5.125% Due 2035 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.125% |
TOTAL |  | $ 450 | 0
Debentures | Debenture Series 2006A, 5.85% Due 2036 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.85% |
TOTAL |  | $ 400 | 400
Debentures | Debenture Series 2006B, 6.20% Due 2036 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 6.20% |
TOTAL |  | $ 400 | 400
Debentures | Debenture Series 2006E, 5.70% Due 2036 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.70% |
TOTAL |  | $ 250 | 250
Debentures | Debenture Series 2007A, 6.30% Due 2037 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 6.30% |
TOTAL |  | $ 525 | 525
Debentures | Debenture 2008B, 6.75 Percent, Due 2038 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 6.75% |
TOTAL |  | $ 600 | 600
Debentures | Debenture 2009B, 6.00 Percent, Due 2039 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 6.00% |
TOTAL |  | $ 60 | 60
Debentures | Debenture 2009C, 5.50 Percent, Due 2039 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.50% |
TOTAL |  | $ 600 | 600
Debentures | Debenture 2019C, 3.46 Percent, Due 2039 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.46% |
TOTAL |  | $ 38 | 38
Debentures | Debenture 2010B, 5.70 Percent, Due 2040 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.70% |
TOTAL |  | $ 350 | 350
Debentures | Debenture 2010B, 5.50 Percent, Due 2040 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.50% |
TOTAL |  | $ 115 | 115
Debentures | Debenture 2012A, 4.20 Percent, Due 2042 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 4.20% |
TOTAL |  | $ 400 | 400
Debentures | Debenture 2013A, 3.95 Percent, Due 2043 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.95% |
TOTAL |  | $ 700 | 700
Debentures | Debenture 2014A, 4.45 Percent, Due 2044 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 4.45% |
TOTAL |  | $ 850 | 850
Debentures | Debenture 2015A, 4.50 Percent, Due 2045 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 4.50% |
TOTAL |  | $ 650 | 650
Debentures | Debenture 2015A, 4.95 Percent, Due 2045 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 4.95% |
TOTAL |  | $ 120 | 120
Debentures | Debenture Series 2015B, 4.69% due 2045 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 4.69% |
TOTAL |  | $ 100 | 100
Debentures | Debenture 2016A, 3.85 Percent, Due 2046 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.85% |
TOTAL |  | $ 550 | 550
Debentures | Debenture Series 2016A. 3.88% Due 2046 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.88% |
TOTAL |  | $ 75 | 75
Debentures | Debenture Series 2017A, 3.875% Due 2047 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.875% |
TOTAL |  | $ 500 | 500
Debentures | Debenture Series 2018E, 4.65% Due 2048 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 4.65% |
TOTAL |  | $ 600 | 600
Debentures | Debenture Series 2018A, 4.35% Due 2048 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 4.35% |
TOTAL |  | $ 125 | 125
Debentures | Debenture Series 2018B, 4.35% Due 2048 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 4.35% |
TOTAL |  | $ 25 | 25
Debentures | Debenture 2019A, 4.125 Percent, Due 2049 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 4.125% |
TOTAL |  | $ 700 | 700
Debentures | Debenture 2019A, 3.73 Percent, Due 2049 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.73% |
TOTAL |  | $ 43 | 43
Debentures | Debenture 2020B, 3.95 Percent, Due 2050 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.95% |
TOTAL |  | $ 1,000 | 1,000
Debentures | Debenture 2020B, 3.24 Percent, Due 2050 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.24% |
TOTAL |  | $ 40 | 40
Debentures | Debenture 2021B, 3.170 Percent, Due 2051 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.17% |
TOTAL |  | $ 30 | 30
Debentures | Debenture 2021C, 3.20 Percent, Due 2051 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.20% |
TOTAL |  | $ 600 | 600
Debentures | Debenture 2022A, 6.15%, Due 2052 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 6.15% |
TOTAL |  | $ 700 | 700
Debentures | Debenture 2023C, 5.90%, Due 2053 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.90% |
TOTAL |  | $ 900 | 900
Debentures | Debenture 2023A, 6.59%, Due 2053 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 659.00% |
TOTAL |  | $ 50 | 50
Debentures | Debenture 2024B, 5.70 Percent, Due 2054 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.70% |
TOTAL |  | $ 1,000 | 0
Debentures | Debenture 2024A, 5.41 Percent, Due 2054 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.41% |
TOTAL |  | $ 125 | 0
Debentures | Debenture Series 2014C, 4.625% Due 2054 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 4.625% |
TOTAL |  | $ 750 | 750
Debentures | Debenture 2024E, 5.50 Percent, Due 2055 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 5.50% |
TOTAL |  | $ 650 | 0
Debentures | Debenture Series 2016C, 4.30% Due 2056 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 4.30% |
TOTAL |  | $ 500 | 500
Debentures | Debenture Series 2017C, 4.00% Due 2057 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 4.00% |
TOTAL |  | $ 350 | 350
Debentures | Debenture Series 2018B, 4.50% Due 2058 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 4.50% |
TOTAL |  | $ 700 | 700
Debentures | Debenture 2019B, 3.70 Percent, Due 2059 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.70% |
TOTAL |  | $ 600 | 600
Debentures | Debenture 2020C, 3.00 Percent, Due 2060 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.00% |
TOTAL |  | $ 600 | 600
Debentures | Debenture 2021B, 3.60 Percent, Due 2061 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate |  | 3.60% |
TOTAL |  | $ 750 | 750
Tax-Exempt Debt |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
TOTAL PROJECT DEBT |  | $ 225 | 450
Tax-Exempt Debt | Tax Exempt Debt Series 2010A Due 2024 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate | [3] | 3.23% |
TOTAL PROJECT DEBT | [3] | $ 0 | 225
Tax-Exempt Debt | Tax Exempt Debt Series 2004C, 1.663% Due 2039 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate | [4] | 3.47% |
TOTAL PROJECT DEBT | [4] | $ 99 | 99
Tax-Exempt Debt | Tax-Exempt Debt Series 2005A, 1.627% Due 2039 |  |  |
Schedule of Capitalization, Long-term Debt [Line Items] |  |  |
Interest Rate | [4] | 3.40% |
TOTAL PROJECT DEBT | [4] | $ 126 | $ 126
[1] | (d) The sale and transfer of Broken Bow II, including the related debt, was completed in January 2025. See Notes C, W and X.
[2] | (a) Rates reset quarterly; December 31, 2024 floating rate equals SOFR+0.52 percent.
[3] | 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.
[4] | (c) Rates reset weekly; December 31, 2024 rates shown

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