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Valuation and Qualifying Accounts (Tables) | 12 Months Ended
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Dec. 31, 2024
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
Schedule of Valuation and Qualifying Accounts Disclosure | NISOURCE INC. SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS
Twelve months ended December 31, 2024
|  |  | Additions |  |  |  |  |
($ in millions) | Balance Jan. 1, 2024 |  | Charged to Costs and Expenses |  | Charged to Other Account (1) |  |  | Deductions for Purposes for which Reserves were Created |  | Balance Dec. 31, 2024
Reserves Deducted in Consolidated Balance Sheet from Assets to Which They Apply: |  |  |  |  |  |  |  |  |  |
Reserve for accounts receivable | $ | 22.9 |  |  | $ | 23.2 |  |  | $ | 32.3 |  |  |  | $ | 54.7 |  |  | $ | 23.7 |
Reserve for deferred charges and other | 1.3 |  |  | — |  |  | (0.2) |  |  |  | — |  |  | 1.1 |
Twelve months ended December 31, 2023
|  |  | Additions |  |  |  |  |
($ in millions) | Balance Jan. 1, 2023 |  | Charged to Costs and Expenses |  | Charged to Other Account (1) |  |  | Deductions for Purposes for which Reserves were Created |  | Balance Dec. 31, 2023
Reserves Deducted in Consolidated Balance Sheet from Assets to Which They Apply: |  |  |  |  |  |  |  |  |  |
Reserve for accounts receivable | $ | 23.9 |  |  | $ | 23.4 |  |  | $ | 36.6 |  |  |  | $ | 61.0 |  |  | $ | 22.9 |
Reserve for deferred charges and other | 1.0 |  |  | — |  |  | 0.3 |  |  |  | — |  |  | 1.3 |
Twelve months ended December 31, 2022
|  |  | Additions |  |  |  |  |
($ in millions) | Balance Jan. 1, 2022 |  | Charged to Costs and Expenses |  | Charged to Other Account (1) |  |  | Deductions for Purposes for which Reserves were Created |  | Balance Dec. 31, 2022
Reserves Deducted in Consolidated Balance Sheet from Assets to Which They Apply: |  |  |  |  |  |  |  |  |  |
Reserve for accounts receivable | $ | 23.5 |  |  | $ | 20.6 |  |  | $ | 36.4 |  |  |  | $ | 56.6 |  |  | $ | 23.9 |
Reserve for deferred charges and other | 2.3 |  |  | — |  |  | (1.3) |  |  |  | — |  |  | 1.0 |
(1) Charged to Other Accounts reflects the deferral of bad debt expense to a regulatory asset or the movement of the reserve between short term and long term.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-4 + Details
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- References No definition available. + Details
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