XML 54 R42.htm IDEA: XBRL DOCUMENT
v3.24.3

Other, Net (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2024
Other, Net [Abstract] |
Schedule of Other Nonoperating Income (Expense) | The following table displays the components of Other, Net included on the Condensed Statements of Consolidated Income (unaudited):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in millions) | 2024 |  | 2023 |  | 2024 |  | 2023
Interest income | $ | 3.4 |  |  | $ | 2.7 |  |  | $ | 7.8 |  |  | $ | 6.3 |
AFUDC equity | 32.1 |  |  | 6.0 |  |  | 56.7 |  |  | 15.2 |
Pension and other postretirement non-service cost | (5.9) |  |  | (9.8) |  |  | (10.2) |  |  | (18.2) |
Miscellaneous | (0.4) |  |  | (0.5) |  |  | (2.9) |  |  | (1.4) |
Total Other, net | $ | 29.2 |  |  | $ | (1.6) |  |  | $ | 51.4 |  |  | $ | 1.9 |

X
- Definition Other, Net [Abstract] + References No definition available. + Details
Name: | nix_OtherNetAbstract
Namespace Prefix: | nix_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items. + References No definition available. + Details
Name: | us-gaap_ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration