XML 73 R63.htm IDEA: XBRL DOCUMENT v3.23.1

Variable Interest Entities (Narrative) (Details)	Mar. 31, 2023 Rate MW
Variable Interest Entity [Line Items]
Wind Power Purchase Agreement, Purchase Percentage | Rate	100.00%
Rosewater
Variable Interest Entity [Line Items]
Nameplate Capacity	102
Indiana Crossroads Wind
Variable Interest Entity [Line Items]
Nameplate Capacity	302
Indiana Crossroads Solar
Variable Interest Entity [Line Items]
Nameplate Capacity	200

X

- Definition

Nameplate Capacity

+ References

No definition available.

+ Details

Name:	nix_NameplateCapacity
Namespace Prefix:	nix_
Data Type:	dtr-types:powerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Wind Power Purchase Agreement, Purchase Percentage

+ References

No definition available.

+ Details

Name:	nix_WindPowerPurchaseAgreementPurchasePercentage
Namespace Prefix:	nix_
Data Type:	dtr-types:percentItemType
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_VariableInterestEntityLineItems
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:

X

- Details

Name:	dei_LegalEntityAxis=nix_IndianaCrossroadsWindMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=nix_IndianaCrossroadsSolarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: