XML 60 R50.htm IDEA: XBRL DOCUMENT
v3.23.1

Equity Schedule of Series A Equity Units (Details) - USD ($) shares in Thousands, $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Apr. 19, 2021 | Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Schedule of Series A Equity Units [Line Items] |  |  |  |
Purchase contract liability(1) | $ 168.8 | $ 48.8 |  | $ 65.0
Payments of Stock Issuance Costs | 27.0 |  |  |
Equity Units Stock Purchase Contract Liability Payments |  | $ 16.7 | $ 16.7 |
Preferred Stock |  |  |  |
Schedule of Series A Equity Units [Line Items] |  |  |  |
Payments of Stock Issuance Costs | 22.5 |  |  |
Purchase Contract Liability |  |  |  |
Schedule of Series A Equity Units [Line Items] |  |  |  |
Payments of Stock Issuance Costs | $ 4.5 |  |  |
Series A Corporate Units |  |  |  |
Schedule of Series A Equity Units [Line Items] |  |  |  |
Stock Issued During Period, Shares, New Issues | 8,625 |  |  |
Net Proceeds from Sale | $ 835.5 |  |  |
Corporate Units Contract Annual Rate | 7.75% |  |  |

X
- Definition Corporate Units Contract Annual Rate + References No definition available. + Details
Name: | nix_CorporateUnitsContractAnnualRate
Namespace Prefix: | nix_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Equity Units Stock Purchase Contract Liability Payments + References No definition available. + Details
Name: | nix_EquityUnitsStockPurchaseContractLiabilityPayments
Namespace Prefix: | nix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Net Proceeds from Sale + References No definition available. + Details
Name: | nix_NetProceedsFromSale
Namespace Prefix: | nix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Purchase Contract Liability + References No definition available. + Details
Name: | nix_PurchaseContractLiability
Namespace Prefix: | nix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Schedule of Series A Equity Units [Line Items] + References No definition available. + Details
Name: | nix_ScheduleOfSeriesAEquityUnitsLineItems
Namespace Prefix: | nix_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow for cost incurred directly with the issuance of an equity security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfStockIssuanceCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | nix_EquityUnitsComponentsAxis=us-gaap_PreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | nix_EquityUnitsComponentsAxis=nix_PurchaseContractLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalUnitsByClassAxis=nix_SeriesACorporateUnits
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |