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Regulatory Matters - Summary of Utilities Rate Plans (CECONY-Electric) (Details) - CECONY - Electric - Scenario, Forecast | 36 Months Ended
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Dec. 31, 2022 USD ($)
Public Utilities, General Disclosures [Line Items] |
Retention of annual transmission congestion revenues | $ 75,000,000
Weighted average cost of capital (after-tax) (percent) | 6.61%
Authorized return on common equity (percent) | 8.80%
Earnings sharing (percent) | 9.30%
Cost of long-term debt (percent) | 4.63%
Common equity ratio (percent) | 48.00%
Income tax benefit to be credited to customers resulting from TCJA | $ 377,000,000
Tax credit, amortization period | 3 years
Percentage of total consolidated revenues | 15.00%
Percentage of debt to total consolidated debt | 20.00%
Deferrals for property taxes limitation from rates (percent) | 90.00%
Recovery deferral (percent) | 80.00%
Maximum deferral (percent) | 15.00%
Deferred MTA Power Reliability Costs |
Public Utilities, General Disclosures [Line Items] |
Amortization to income of net regulatory (assets) and liabilities | $ 238,000,000
Amortization period | 5 years
Year 1 |
Public Utilities, General Disclosures [Line Items] |
Base rate changes | $ 113,000,000
Amortization to income of net regulatory (assets) and liabilities | 267,000,000
Potential earnings adjustment mechanism incentives | 69,000,000
Negative revenue adjustments | 450,000,000
Average rate base | 21,660,000,000
Base rate, amount of cost recovery | $ 206,000,000
Base rate cost recovery period | 10 years
Deferral, annual maximum (not more than) (percent) | 0.10%
Year 1 | Electric average excluding AMI |
Public Utilities, General Disclosures [Line Items] |
Net utility plant reconciliations | $ 24,572,000,000
Year 1 | Advanced metering infrastructure (AMI) |
Public Utilities, General Disclosures [Line Items] |
Net utility plant reconciliations | 572,000,000
Year 2 |
Public Utilities, General Disclosures [Line Items] |
Base rate changes | 370,000,000
Amortization to income of net regulatory (assets) and liabilities | 269,000,000
Potential earnings adjustment mechanism incentives | 74,000,000
Negative revenue adjustments | 461,000,000
Average rate base | 22,783,000,000
Base rate, amount of cost recovery | $ 245,000,000
Deferral, annual maximum (not more than) (percent) | 0.075%
Year 2 | Electric average excluding AMI |
Public Utilities, General Disclosures [Line Items] |
Net utility plant reconciliations | $ 25,366,000,000
Year 2 | Advanced metering infrastructure (AMI) |
Public Utilities, General Disclosures [Line Items] |
Net utility plant reconciliations | 740,000,000
Year 3 |
Public Utilities, General Disclosures [Line Items] |
Base rate changes | 326,000,000
Amortization to income of net regulatory (assets) and liabilities | 272,000,000
Potential earnings adjustment mechanism incentives | 79,000,000
Negative revenue adjustments | 476,000,000
Average rate base | 23,926,000,000
Base rate, amount of cost recovery | $ 251,000,000
Deferral, annual maximum (not more than) (percent) | 0.05%
Year 3 | Electric average excluding AMI |
Public Utilities, General Disclosures [Line Items] |
Net utility plant reconciliations | $ 26,197,000,000
Year 3 | Advanced metering infrastructure (AMI) |
Public Utilities, General Disclosures [Line Items] |
Net utility plant reconciliations | 806,000,000
Protected Portion |
Public Utilities, General Disclosures [Line Items] |
Impact in regulatory liability resulting from TCJA | 1,663,000,000
Protected Portion | Year 1 |
Public Utilities, General Disclosures [Line Items] |
Impact in regulatory liability resulting from TCJA | 49,000,000
Protected Portion | Year 2 |
Public Utilities, General Disclosures [Line Items] |
Impact in regulatory liability resulting from TCJA | 50,000,000
Protected Portion | Year 3 |
Public Utilities, General Disclosures [Line Items] |
Impact in regulatory liability resulting from TCJA | 53,000,000
Unprotected Portion |
Public Utilities, General Disclosures [Line Items] |
Impact in regulatory liability resulting from TCJA | $ 784,000,000
TCJA regulatory liabilities amortization period | 5 years
Annually |
Public Utilities, General Disclosures [Line Items] |
Income tax benefit to be credited to customers resulting from TCJA | $ 126,000,000
Annually | Deferred MTA Power Reliability Costs |
Public Utilities, General Disclosures [Line Items] |
Amortization to income of net regulatory (assets) and liabilities | 48,000,000
Annually | Unprotected Portion |
Public Utilities, General Disclosures [Line Items] |
Impact in regulatory liability resulting from TCJA | $ 157,000,000

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