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Leases - Other Related Information (Details) | Mar. 31, 2022 | Dec. 31, 2021
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Lessee, Lease, Description [Line Items] |  |
Weighted Average Remaining Lease Term, Operating leases | 18 years 2 months 12 days | 18 years 6 months
Weighted Average Remaining Lease Term, Finance leases | 7 years 2 months 12 days | 7 years 1 month 6 days
Weighted Average Discount Rate, Operating leases | 4.30% | 4.30%
Weighted Average Discount Rate, Finance leases | 1.80% | 1.80%
CECONY | Subsidiaries |  |
Lessee, Lease, Description [Line Items] |  |
Weighted Average Remaining Lease Term, Operating leases | 11 years 10 months 24 days | 12 years 1 month 6 days
Weighted Average Remaining Lease Term, Finance leases | 3 years | 3 years 1 month 6 days
Weighted Average Discount Rate, Operating leases | 3.50% | 3.50%
Weighted Average Discount Rate, Finance leases | 1.10% | 1.10%

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