Cover
| Cover | Sep. 13, 2023 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Sep. 13, 2023 |
| Entity File Number | 000-00508 |
| Entity Registrant Name | SIERRA PACIFIC POWER COMPANY |
| Entity Tax Identification Number | 88-0044418 |
| Entity Address, Address Line One | 6100 Neil Road |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, City or Town | Reno |
| Entity Address, State or Province | NV |
| Entity Address, Postal Zip Code | 89511 |
| City Area Code | 775 |
| Local Phone Number | 834-4011 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000090144 |
| Amendment Flag | false |