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Leases - Other Related Information (Details) | Mar. 31, 2023 | Dec. 31, 2022
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Lessee, Lease, Description [Line Items] |  |
Weighted Average Remaining Lease Term, Operating leases (in years) | 12 years 1 month 6 days | 12 years 3 months 18 days
Weighted Average Remaining Lease Term, Finance leases (in years) | 6 years 6 months | 7 years 2 months 12 days
Weighted Average Discount Rate, Operating leases (percent) | 3.70% | 3.70%
Weighted Average Discount Rate, Finance leases (percent) | 2.90% | 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) | 12 years 3 months 18 days |
CECONY | Subsidiaries |  |
Lessee, Lease, Description [Line Items] |  |
Weighted Average Remaining Lease Term, Operating leases (in years) | 12 years 1 month 6 days | 12 years 4 months 24 days
Weighted Average Remaining Lease Term, Finance leases (in years) | 3 years 3 months 18 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) | 2.80% | 1.00%

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