v3.26.1
Income Tax - Schedule of Income Tax Reconciliation (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
$        
U.S. federal statutory tax rate $ 86 $ 62 $ 343 $ 279
Tax Jurisdiction of Domicile [Extensible Enumeration] UNITED STATES UNITED STATES UNITED STATES UNITED STATES
State income taxes, net of federal income taxes $ 21 $ 13 $ 86 $ 69
MTA Surcredit amortization, net of federal income taxes 1 (7) (9) (21)
Tax Credits (3) (5) (7) (9)
Nontaxable or Nondeductible items (1) (2) (1) (4)
Changes in unrecognized tax benefits 0 1 1 2
Amortization of excess deferred federal income taxes (16) (11) (33) (22)
Allowance for uncollectible accounts, net of regulatory recovery (1) (9) (7) (21)
Cost of removal 12 9 25 19
Other 1 (1) 5 0
Effective tax rate $ 100 $ 50 $ 403 $ 292
%        
U.S. federal statutory tax rate 21.00% 21.00% 21.00% 21.00%
State income taxes, net of federal income taxes 5.30% 4.60% 5.20% 5.20%
MTA Surcharge (Surcredit) amortization, net of federal income taxes 0.004 (0.025) (0.005) (0.016)
Tax Credits (0.80%) (1.80%) (0.40%) (0.60%)
Nontaxable or Nondeductible items (0.10%) (0.80%) (0.10%) (0.30%)
Changes in unrecognized tax benefits 0.00% 0.30% 0.10% 0.10%
Amortization of excess deferred federal income taxes (4.00%) (3.70%) (2.00%) (1.70%)
Allowance for uncollectible accounts, net of regulatory recovery (0.30%) (2.90%) (0.40%) (1.60%)
Cost of removal 2.90% 3.00% 1.50% 1.50%
Other 0.30% (0.30%) 0.30% 0.00%
Effective tax rate 24.70% 16.90% 24.70% 22.00%
CECONY        
$        
Effective tax rate $ 98 $ 48 $ 329 $ 275
CECONY | Subsidiaries        
$        
U.S. federal statutory tax rate 83 57 285 261
State income taxes, net of federal income taxes 20 14 71 65
MTA Surcredit amortization, net of federal income taxes 1 (7) (8) (20)
Tax Credits (2) (3) (5) (7)
Nontaxable or Nondeductible items 0 (3) 0 (4)
Changes in unrecognized tax benefits 0 1 1 2
Amortization of excess deferred federal income taxes (15) (9) (29) (18)
Allowance for uncollectible accounts, net of regulatory recovery (1) (9) (7) (22)
Cost of removal 11 8 23 18
Other 1 (1) (2) 0
Effective tax rate $ 98 $ 48 $ 329 $ 275
%        
U.S. federal statutory tax rate 21.00% 21.00% 21.00% 21.00%
State income taxes, net of federal income taxes 5.10% 5.10% 5.20% 5.20%
MTA Surcharge (Surcredit) amortization, net of federal income taxes 0.004 (0.026) (0.006) (0.016)
Tax Credits (0.60%) (1.20%) (0.40%) (0.50%)
Nontaxable or Nondeductible items 0.00% (0.90%) 0.00% (0.30%)
Changes in unrecognized tax benefits 0.00% 0.30% 0.10% 0.10%
Amortization of excess deferred federal income taxes (3.70%) (3.30%) (2.10%) (1.50%)
Allowance for uncollectible accounts, net of regulatory recovery (0.30%) (3.30%) (0.50%) (1.70%)
Cost of removal 2.70% 3.00% 1.70% 1.50%
Other 0.30% (0.30%) (0.20%) 0.00%
Effective tax rate 24.90% 17.80% 24.20% 22.20%