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Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2018
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)
2018 |  |  |  |  |  |  |
Operating Revenues | $ | 1,750.8 |  |  | $ | 1,007.0 |  |  | $ | 895.0 |  |  | $ | 1,461.7 |
Operating Income (Loss) | 400.6 |  |  | 118.4 |  |  | (315.9 | ) |  | (78.4 | )
Net Income (Loss) | 276.1 |  |  | 24.5 |  |  | (339.5 | ) |  | (11.7 | )
Preferred Dividends | — |  |  | (1.3 | ) |  | (5.6 | ) |  | (8.1 | )
Net Income (Loss) Available to Common Shareholders | 276.1 |  |  | 23.2 |  |  | (345.1 | ) |  | (19.8 | )
Earnings (Loss) Per Share |  |  |  |  |  |  |
Basic Earnings (Loss) Per Share | $ | 0.82 |  |  | $ | 0.07 |  |  | $ | (0.95 | ) |  | $ | (0.05 | )
Diluted Earnings (Loss) Per Share | $ | 0.81 |  |  | $ | 0.07 |  |  | $ | (0.95 | ) |  | $ | (0.05 | )
2017 |  |  |  |  |  |  |
Operating Revenues | $ | 1,598.6 |  |  | $ | 990.7 |  |  | $ | 917.0 |  |  | $ | 1,368.3 |
Operating Income | 415.4 |  |  | 124.0 |  |  | 111.2 |  |  | 270.6 |
Net Income (Loss) | 211.3 |  |  | (44.4 | ) |  | 14.0 |  |  | (52.4 | )
Earnings (Loss) Per Share |  |  |  |  |  |  |
Basic Earnings (Loss) Per Share | $ | 0.65 |  |  | $ | (0.14 | ) |  | $ | 0.04 |  |  | $ | (0.16 | )
Diluted Earnings (Loss) Per Share | $ | 0.65 |  |  | $ | (0.14 | ) |  | $ | 0.04 |  |  | $ | (0.16 | )
(1) Net income for the first quarter of 2018 was impacted by an interest rate swap settlement gain of $21.2 million (pretax). See Note 9, "Risk Management Activities" for additional information. (2) Net income for the second quarter of 2017 was impacted by a $111.5 million loss (pretax) on an early extinguishment of long-term debt. See Note 14, "Long-Term Debt" for additional information. (3) Net income for the third quarter of 2018 was impacted by approximately $462 million in expenses (pretax) related to the Greater Lawrence Incident restoration and a $33.0 million loss (pretax) on an early extinguishment of long-term debt. See Note 18-E, "Other Matters" and Note 14, "Long-Term Debt" for additional information. (4) Net income for the fourth quarter of 2018 was impacted by approximately $426 million in expenses (pretax, net of insurance recoveries) related to the Greater Lawrence Incident restoration, partially offset by an interest rate swap settlement gain of $25.0 million (pretax) and a $120.7 million income tax benefit from true-ups to reflect regulatory outcomes associated with excess deferred income taxes. Net income for the fourth quarter of 2017 was impacted by a $161.1 million increase in tax expense as a result of implementing the provisions of the TCJA. See Note 18-E, "Other Matters," Note 9, "Risk Management Activities" and Note 10, "Income Taxes" for additional information.

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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=109225645&loc=d3e1280-108306 + Details
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