Cover
Cover | Oct. 02, 2023 |
Cover [Abstract] | |
Document Type | 8-K12G3 |
Document Period End Date | --12-31 |
Entity Registrant Name | NorthWestern Energy Group, Inc. |
Entity Incorporation, State or Country Code | DE |
Entity File Number | |
Entity Tax Identification Number | 93-2020320 |
Entity Address, Address Line One | 3010 W. 69th Street |
Entity Address, City or Town | Sioux Falls |
Entity Address, State or Province | SD |
Entity Address, Postal Zip Code | 57108 |
City Area Code | 605 |
Local Phone Number | 978-2900 |
Written Communications | false |
Soliciting Material | false |
Pre-commencement Tender Offer | false |
Pre-commencement Issuer Tender Offer | false |
Title of 12(b) Security | Common stock |
Trading Symbol | NWE |
Security Exchange Name | NASDAQ |
Entity Emerging Growth Company | false |
Entity Central Index Key | 0001993004 |
Amendment Flag | false |
Document Period End Date | Oct. 02, 2023 |