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Income Tax (Tables)
12 Months Ended
Dec. 31, 2025
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax
The components of income tax are as follows:
  Con EdisonCECONY
(Millions of Dollars)202520242023202520242023
State
Current$(49)$(81)$179$(40)$(87)$(102)
Deferred1822236159219246
Federal
Current33(17)176149(63)(95)
Deferred414198237278246311
Amortization of investment tax credits(6)(5)(111)(2)(1)(2)
Total income tax expense$574$318$487$544$314$358
Schedule of Income Tax Reconciliation
Reconciliation of the difference between income tax expense and the amount computed by applying the prevailing statutory income tax rate to income before income taxes is as follows:
  Con Edison
(Millions of Dollars) (% of Pre-tax income)202520242023
U.S. Federal Statutory Tax Rate (a)$54521.0 %$44921.0 %$63121.0 %
State Income Taxes:
State income taxes, net of federal income taxes (b)1405.4 1155.4 1655.5 
MTA Surcredit amortization, net of federal income taxes(35)(1.3)(3)(0.1)— 
Non-NY State Income taxes related to the Clean Energy Businesses, net of federal income taxes — — (18)(0.6)
Tax Credits:
R&D credit and ITC amortization(10)(0.4)(19)(0.9)(20)(0.7)
Production Tax Credit  — (6)(0.3)(12)(0.4)
Deferred unamortized ITC recognized on sale of subsidiary — — (107)(3.5)
Nontaxable or Nondeductible items 50.2 (2)(0.1)1— 
Changes in unrecognized tax benefits — (2)(0.1)1— 
Other Adjustments:
Amortization of excess deferred federal income taxes (c)(50)(2.0)(203)(9.5)(172)(5.7)
Allowance for uncollectible accounts, net of regulatory recovery(43)(1.7)(25)(1.2)(14)(0.5)
Cost of removal351.4 241.1 371.2 
Other(13)(0.5)(10)(0.4)(5)(0.1)
Effective tax rate$57422.1 %$31814.9 %$48716.2 %
(a)Income before income tax expense is attributable to domestic operations.
(b)State income taxes in New York account for the majority of the tax effect in this category.
(c)The amortization of excess deferred federal income taxes is lower in 2025, due to the completion of regulatory amortization of non-plant and certain plant-related excess deferred federal income taxes as of December 31, 2024, representing an accelerated refund of the related regulatory liability under its New York electric and gas rate plans.
  CECONY
(Millions of Dollars) (% of Pre-tax income)202520242023
U.S. Federal Statutory Tax Rate (a)$51521.0 %$43321.0 %$41221.0 %
State Income Taxes:
State income taxes, net of federal income taxes (b)1275.2 1075.2 1135.8 
MTA Surcredit amortization, net of federal income taxes(33)(1.3)(2)(0.1)— 
Tax Credits(6)(0.2)(14)(0.7)(17)(0.8)
Nontaxable or Nondeductible items 50.2 (1)(0.1)20.1 
Changes in unrecognized tax benefits — (2)(0.1)(2)(0.1)
Other Adjustments:
Amortization of excess deferred federal income taxes (c)(43)(1.7)(196)(9.5)(166)(8.4)
Allowance for uncollectible accounts, net of regulatory recovery(43)(1.8)(24)(1.2)(14)(0.7)
Cost of removal321.3 201.0 331.7 
Other(10)(0.5)(7)(0.3)(3)(0.4)
Effective tax rate$54422.2 %$31415.2 %$35818.2 %
(a)Income before income tax expense is attributable to domestic operations.
(b)State income taxes in New York account for the majority of the tax effect in this category.
(c)The amortization of excess deferred federal income taxes is lower in 2025, due to the completion of regulatory amortization of non-plant and certain plant-related excess deferred federal income taxes as of December 31, 2024, representing an accelerated refund of the related regulatory liability under its New York electric and gas rate plans.
Schedule of Differences on Deferred Tax Assets and Liabilities
The tax effects of temporary differences, which gave rise to deferred tax assets and liabilities, are as follows:
                  Con Edison                CECONY
(Millions of Dollars)2025202420252024
Deferred tax liabilities:
Property basis differences$9,703$9,222$9,117$8,632
Regulatory assets:
   Energy efficiency and other clean energy programs 560474532449
   Customer Account Deferrals306301304297
   Environmental remediation costs303291277267
   Legacy Meters107116104112
   Other regulatory assets147260110213
Pension and Retiree Benefits – Asset1,1861,0631,1531,037
Operating lease right-of-use asset141143141142
Other 324
Total deferred tax liabilities$12,456$11,870$11,762$11,149
Deferred tax assets:
Regulatory liabilities:
   Unrecognized pension and other postretirement costs$245$296$226$276
   Future income tax315343285312
   Other regulatory liabilities1,012909916809
Superfund and other environmental costs303291275265
Pensions and retiree benefits - liability158154147142
Asset retirement obligations134127134127
Operating lease liabilities141143141142
Tax credits carryforward2413468
Corporate Alternative Minimum Tax carryforward205139213111
Loss carryforwards51423316
Valuation allowance(12)(12)
Equity investments6880
Other 160140
Total deferred tax assets$2,861$3,018$2,378$2,340
 Net deferred tax liabilities $9,595$8,852$9,384$8,809
Unamortized investment tax credits24221610
Net deferred tax liabilities and unamortized investment tax credits$9,619$8,874$9,400$8,819
Schedule of Cash Paid for Income Taxes
Cash paid for income taxes (net of refunds received):
Con EdisonCECONY
(Millions of Dollars)202520242023202520242023
Federal$(21)$(1)$230$(24)$61$46
New York(143)6164(145)2(73)
New Jersey12
All other(1)11
Total cash paid for income taxes (net of refunds) $(165)$7$397$(169)$63$(27)
Schedule of Unrecognized Tax Benefits
A reconciliation of the beginning and ending amounts of unrecognized tax benefits for Con Edison and CECONY follows:
Con EdisonCECONY
(Millions of Dollars)202520242023202520242023
Balance at January 1,$9$11$23$5$7$8
Additions based on tax positions related to the current year248244
Additions based on tax positions of prior years31
Reductions for tax positions of prior years(2)(6)(11)(2)(6)(6)
Settlements(12)
Balance at December 31,$9$9$11$5$5$7