Other Postretirement Benefits - Schedule of Expected Benefit Payments (Details) - Other Postretirement Benefits $ in Millions	Dec. 31, 2025 USD ($)
Defined Benefit Plan Disclosure [Line Items]
2026	$ 66
2027	68
2028	69
2029	70
2030	71
2031-2035	350
CECONY
Defined Benefit Plan Disclosure [Line Items]
2026	58
2027	60
2028	61
2029	62
2030	63
2031-2035	$ 311

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details