Capitalization - Schedule of Long-Term Debt Maturities (Details) $ in Millions	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
2025	$ 0
2026	250
2027	780
2028	800
2029	44
Broken Bow II \| Disposal Group, Held-for-sale, Not Discontinued Operations \| Clean Energy Businesses
Debt Instrument [Line Items]
Disposal group, including discontinued operation. Long-term debt, including current maturities	59
CECONY
Debt Instrument [Line Items]
2025	0
2026	250
2027	700
2028	800
2029	$ 0

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