Document and Entity Information
Document and Entity Information | Dec. 11, 2023 |
Document And Entity Information [Line Items] | |
Entity Registrant Name | NIAGARA MOHAWK POWER CORP /NY/ |
Amendment Flag | false |
Entity Central Index Key | 0000071932 |
Document Type | 8-K |
Document Period End Date | Dec. 11, 2023 |
Entity Incorporation State Country Code | NY |
Entity File Number | 1-2987 |
Entity Tax Identification Number | 15-0265555 |
Entity Address, Address Line One | 300 Erie Boulevard West |
Entity Address, City or Town | Syracuse |
Entity Address, State or Province | NY |
Entity Address, Postal Zip Code | 13202 |
City Area Code | (315) |
Local Phone Number | 474-1511 |
Written Communications | false |
Soliciting Material | false |
Pre Commencement Tender Offer | false |
Pre Commencement Issuer Tender Offer | false |
Entity Emerging Growth Company | false |
M 3.6 Cumulative Preferred Stock [Member] | |
Document And Entity Information [Line Items] | |
Security 12b Title | 3.6 % Cumulative Preferred Stock |
Trading Symbol | NMK-B |
Security Exchange Name | NYSE |
M 3.9 Cumulative Preferred Stock [Member] | |
Document And Entity Information [Line Items] | |
Security 12b Title | 3.9 % Cumulative Preferred Stock |
Trading Symbol | NMK-C |
Security Exchange Name | NYSE |