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Segments Of Business | 12 Months Ended
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Dec. 31, 2020
Segment Reporting [Abstract] |
Segments Of Business | Segments of Business At December 31, 2020, our operations are divided into two primary reportable segments, the Gas Distribution Operations and the Electric Operations segment. The remainder of our operations, which are not significant enough on a stand-alone basis to warrant treatment as an operating segment, are presented as "Corporate and Other" and primarily are comprised of interest expense on holding company debt, and unallocated corporate costs and activities. Refer to Note 3, "Revenue Recognition," for additional information on our segments and their sources of revenues. The following table provides information about our reportable segments. We use operating income as our primary measurement for each of the reported segments and make decisions on finance, dividends and taxes at the corporate level on a consolidated basis. Segment revenues include intersegment sales to affiliated subsidiaries, which are eliminated in consolidation. Affiliated sales are recognized on the basis of prevailing market, regulated prices or at levels provided for under contractual agreements. Operating income is derived from revenues and expenses directly associated with each segment.
Year Ended December 31, (in millions) | 2020 |  | 2019 |  | 2018
Operating Revenues |  |  |  |  |
Gas Distribution Operations |  |  |  |  |
Unaffiliated | $ | 3,128.1 |  |  | $ | 3,509.7 |  |  | $ | 3,406.4 |
Intersegment | 12.1 |  |  | 13.1 |  |  | 13.1 |
Total | 3,140.2 |  |  | 3,522.8 |  |  | 3,419.5 |
Electric Operations |  |  |  |  |
Unaffiliated | 1,535.9 |  |  | 1,698.4 |  |  | 1,707.4 |
Intersegment | 0.7 |  |  | 0.8 |  |  | 0.8 |
Total | 1,536.6 |  |  | 1,699.2 |  |  | 1,708.2 |
Corporate and Other |  |  |  |  |
Unaffiliated | 17.7 |  |  | 0.8 |  |  | 0.7 |
Intersegment | 449.8 |  |  | 468.1 |  |  | 517.6 |
Total | 467.5 |  |  | 468.9 |  |  | 518.3 |
Eliminations | (462.6) |  |  | (482.0) |  |  | (531.5) |
Consolidated Operating Revenues | $ | 4,681.7 |  |  | $ | 5,208.9 |  |  | $ | 5,114.5 |
Year Ended December 31, (in millions) | 2020 |  | 2019 |  | 2018
Operating Income (Loss) |  |  |  |  |
Gas Distribution Operations(1) | $ | 199.1 |  |  | $ | 675.4 |  |  | $ | (254.1) |
Electric Operations | 348.8 |  |  | 406.8 |  |  | 386.1 |
Corporate and Other(2) | 2.9 |  |  | (191.5) |  |  | (7.3) |
Consolidated Operating Income | $ | 550.8 |  |  | $ | 890.7 |  |  | $ | 124.7 |
Depreciation and Amortization |  |  |  |  |
Gas Distribution Operations | $ | 363.1 |  |  | $ | 403.2 |  |  | $ | 301.0 |
Electric Operations | 321.3 |  |  | 277.3 |  |  | 262.9 |
Corporate and Other | 41.5 |  |  | 36.9 |  |  | 35.7 |
Consolidated Depreciation and Amortization | $ | 725.9 |  |  | $ | 717.4 |  |  | $ | 599.6 |
Assets |  |  |  |  |
Gas Distribution Operations | $ | 13,433.0 |  |  | $ | 14,224.5 |  |  | $ | 13,527.0 |
Electric Operations | 6,443.1 |  |  | 6,027.6 |  |  | 5,735.2 |
Corporate and Other | 2,164.4 |  |  | 2,407.7 |  |  | 2,541.8 |
Consolidated Assets | $ | 22,040.5 |  |  | $ | 22,659.8 |  |  | $ | 21,804.0 |
Capital Expenditures(3) |  |  |  |  |
Gas Distribution Operations | $ | 1,266.9 |  |  | $ | 1,380.3 |  |  | $ | 1,315.3 |
Electric Operations | 422.8 |  |  | 468.9 |  |  | 499.3 |
Corporate and Other | 31.1 |  |  | 18.6 |  |  | — |
Consolidated Capital Expenditures | $ | 1,720.8 |  |  | $ | 1,867.8 |  |  | $ | 1,814.6 |
(1)In 2020, Gas Distribution Operations reflects the loss of $412.4 million on the sale of the Massachusetts Business. For additional information, see Note 1, "Nature of Operations and Summary of Significant Accounting Policies". (2)In 2019, Corporate and Other reflects an impairment charge of $204.8 million for goodwill related to Columbia of Massachusetts. For additional information, see Note 7, "Goodwill and Other Intangible Assets." (3)Amounts differ from those presented on the Statements of Consolidated Cash Flows primarily due to the inclusion of capital expenditures in current liabilities, the capitalized portion of the Corporate Incentive Plan payout, and AFUDC Equity.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8981-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8844-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8657-108599 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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