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Leases - Other Related Information (Details)	Dec. 31, 2023	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Weighted Average Remaining Lease Term, Operating leases (in years)	11 years 4 months 24 days	12 years 3 months 18 days
Weighted Average Remaining Lease Term, Finance leases (in years)	6 years 7 months 6 days	7 years 2 months 12 days
Weighted Average Discount Rate, Operating leases (percent)	3.70%	3.70%
Weighted Average Discount Rate, Finance leases (percent)	3.00%	1.90%
Clean Energy Businesses
Lessee, Lease, Description [Line Items]
Weighted Average Remaining Lease Term, Operating leases (in years)	18 years 3 months 18 days
Weighted Average Discount Rate, Operating leases (percent)	4.40%
Broken Bow II
Lessee, Lease, Description [Line Items]
Weighted Average Remaining Lease Term, Operating leases (in years)	11 years 7 months 6 days
Weighted Average Discount Rate, Operating leases (percent)	3.80%
CECONY
Lessee, Lease, Description [Line Items]
Weighted Average Remaining Lease Term, Operating leases (in years)	11 years 4 months 24 days	12 years 4 months 24 days
Weighted Average Remaining Lease Term, Finance leases (in years)	2 years 8 months 12 days	2 years 3 months 18 days
Weighted Average Discount Rate, Operating leases (percent)	3.70%	3.70%
Weighted Average Discount Rate, Finance leases (percent)	3.10%	1.00%

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- Definition

Weighted average discount rate for finance lease calculated at point in time.

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Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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