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Leases - Other Related Information (Details) | Mar. 31, 2021 | Dec. 31, 2020
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Lessee, Lease, Description [Line Items] |  |
Weighted Average Remaining Lease Term, Operating leases | 18 years 10 months 24 days | 19 years 1 month 6 days
Weighted Average Remaining Lease Term, Finance leases | 7 years 3 months 18 days | 7 years 3 months 18 days
Weighted Average Discount Rate, Operating leases | 4.30% | 4.30%
Weighted Average Discount Rate, Finance leases | 1.80% | 1.80%
CECONY |  |
Lessee, Lease, Description [Line Items] |  |
Weighted Average Remaining Lease Term, Operating leases | 12 years 9 months 18 days | 13 years
Weighted Average Remaining Lease Term, Finance leases | 3 years 9 months 18 days | 4 years
Weighted Average Discount Rate, Operating leases | 3.60% | 3.60%
Weighted Average Discount Rate, Finance leases | 1.30% | 1.30%

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