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Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Data [Abstract] |
Schedule Of Quarterly Financial Data |
(in millions, except per share data) | First Quarter(1) |  | Second Quarter(2) |  | Third Quarter(3) |  | Fourth Quarter(4)
2020 |  |  |  |  |  |  |
Operating Revenues | $ | 1,605.5 |  |  | $ | 962.7 |  |  | $ | 902.5 |  |  | $ | 1,211.0 |
Operating Income | 148.2 |  |  | 91.7 |  |  | 92.8 |  |  | 218.1 |
Net Income (Loss) | 75.6 |  |  | (4.7) |  |  | (172.9) |  |  | 87.8 |
Net income attributable to noncontrolling interest | — |  |  | — |  |  | — |  |  | 3.4 |
Net Income (Loss) attributable to NiSource | 75.6 |  |  | (4.7) |  |  | (172.9) |  |  | 84.4 |
Preferred Dividends | (13.8) |  |  | (13.8) |  |  | (13.8) |  |  | (13.7) |
Net Income (Loss) Available to Common Shareholders | 61.8 |  |  | (18.5) |  |  | (186.7) |  |  | 70.7 |
Earnings (Loss) Per Share |  |  |  |  |  |  |
Basic Earnings (Loss) Per Share | $ | 0.16 |  |  | $ | (0.05) |  |  | $ | (0.49) |  |  | $ | 0.18 |
Diluted Earnings (Loss) Per Share | $ | 0.16 |  |  | $ | (0.05) |  |  | $ | (0.49) |  |  | $ | 0.18 |
2019 |  |  |  |  |  |  |
Operating Revenues | $ | 1,869.8 |  |  | $ | 1,010.4 |  |  | $ | 931.5 |  |  | $ | 1,397.2 |
Operating Income (Loss) | 374.2 |  |  | 463.5 |  |  | 91.0 |  |  | (38.0) |
Net Income (Loss) | 218.9 |  |  | 296.9 |  |  | 6.6 |  |  | (139.3) |
Preferred Dividends | (13.8) |  |  | (13.8) |  |  | (13.8) |  |  | (13.7) |
Net Income (Loss) Available to Common Shareholders | 205.1 |  |  | 283.1 |  |  | (7.2) |  |  | (153.0) |
Earnings (Loss) Per Share |  |  |  |  |  |  |
Basic Earnings (Loss) Per Share | $ | 0.55 |  |  | $ | 0.76 |  |  | $ | (0.02) |  |  | $ | (0.41) |
Diluted Earnings (Loss) Per Share | $ | 0.55 |  |  | $ | 0.75 |  |  | $ | (0.02) |  |  | $ | (0.41) |
(1) Net income for the first quarter of 2020 was impacted by $280.2 million loss on sale of the Massachusetts Business. Net income for the first quarter of 2019 was impacted by $108.0 million in insurance recoveries (pretax) related to the Greater Lawrence Incident. See Note 1, "Company Structure and Principles of Consolidation" and Note 20-E, "Other Matters" for additional information. (2) Net income for the second quarter of 2020 was impacted by an additional $84.4 million loss on sale of the Massachusetts Business. Net income for the second quarter of 2019 was impacted by $297.0 million in insurance recoveries (pretax) related to the Greater Lawrence Incident. See Note 1, "Company Structure and Principles of Consolidation" and Note 20-E, "Other Matters" for additional information. (3) Net loss for the third quarter of 2020 was impacted by $243.4 million loss on early extinguishments of long-term debt. See Note 15, "Long-Term Debt" for additional information. (4) Net loss for the fourth quarter of 2019 was impacted by an impairment charge of $204.8 million for goodwill and an impairment charge of $209.7 million for franchise rights, in each case related to Columbia of Massachusetts. For additional information, see Note 7, "Goodwill and Other Intangible Assets."

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306 + Details
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