Leases - Other Related Information (Details)	Dec. 31, 2024	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Weighted Average Remaining Lease Term, Operating leases (in years)	10 years 9 months 18 days	11 years 4 months 24 days
Weighted Average Remaining Lease Term, Finance leases (in years)	6 years	6 years 7 months 6 days
Weighted Average Discount Rate, Operating leases (percent)	3.80%	3.70%
Weighted Average Discount Rate, Finance leases (percent)	2.00%	3.00%
Clean Energy Businesses
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%
Broken Bow II
Lessee, Lease, Description [Line Items]
Weighted Average Remaining Lease Term, Operating leases (in years)	10 years 9 months 18 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)	10 years 7 months 6 days	11 years 4 months 24 days
Weighted Average Remaining Lease Term, Finance leases (in years)	5 years	2 years 8 months 12 days
Weighted Average Discount Rate, Operating leases (percent)	3.80%	3.70%
Weighted Average Discount Rate, Finance leases (percent)	1.60%	3.10%