XML 63 R52.htm IDEA: XBRL DOCUMENT
v3.25.2

Regulatory Matters (Narrative) (Details) | Jun. 30, 2025 MW
--- | ---
Rosewater |
Public Utilities, General Disclosures [Line Items] |
Nameplate Capacity | 102

X
- Definition Nameplate Capacity + References No definition available. + Details
Name: | nix_NameplateCapacity
Namespace Prefix: | nix_
Data Type: | dtr-types1:powerItemType
Balance Type: | na
Period Type: | instant

X
- Definition 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. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=nix_RosewaterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |