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Report of Business Segments | 12 Months Ended
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Dec. 31, 2022
Segment Reporting [Abstract] |
Report of Business Segments | 12. Report of Business Segments OGE Energy reports its operations in two business segments: (i) the electric company segment, which is engaged in the generation, transmission, distribution and sale of electric energy and (ii) natural gas midstream operations segment. Prior to the Enable and Energy Transfer merger closing on December 2, 2021, OGE Energy's natural gas midstream operations segment included its equity method investment in Enable. For the period of December 2, 2021 to September 30, 2022, OGE Energy's natural gas midstream operations segment included OGE Energy's investment in Energy Transfer's equity securities acquired in the merger. For the year ended December 31, 2022, this segment also includes legacy Enable seconded employee pension and postretirement costs. Other operations primarily includes the operations of the holding company. Intersegment revenues are recorded at prices comparable to those of unaffiliated customers and are affected by regulatory considerations. The following tables present the results of OGE Energy's business segments for the years ended December 31, 2022, 2021 and 2020.
2022 |  | Electric Company |  |  | Natural Gas Midstream Operations |  |  | Other Operations |  |  | Eliminations |  |  | Total |
(In millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 3,375.7 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 3,375.7 |
Fuel, purchased power and direct transmission expense |  |  | 1,662.4 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,662.4 |
Other operation and maintenance |  |  | 491.9 |  |  |  | 12.6 |  |  |  | (3.1 | ) |  |  | — |  |  |  | 501.4 |
Depreciation and amortization |  |  | 460.9 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 460.9 |
Taxes other than income |  |  | 98.0 |  |  |  | 0.1 |  |  |  | 3.4 |  |  |  | — |  |  |  | 101.5 |
Operating income (loss) |  |  | 662.5 |  |  |  | (12.7 | ) |  |  | (0.3 | ) |  |  | — |  |  |  | 649.5 |
Gain on equity securities |  |  | — |  |  |  | 282.1 |  |  |  | — |  |  |  | — |  |  |  | 282.1 |
Other income (expense) |  |  | 11.2 |  |  |  | 10.0 |  |  |  | 4.9 |  |  |  | (2.1 | ) |  |  | 24.0 |
Interest expense |  |  | 157.8 |  |  |  | — |  |  |  | 10.6 |  |  |  | (2.1 | ) |  |  | 166.3 |
Income tax expense (benefit) |  |  | 76.4 |  |  |  | 48.1 |  |  |  | (0.9 | ) |  |  | — |  |  |  | 123.6 |
Net income (loss) |  | $ | 439.5 |  |  | $ | 231.3 |  |  | $ | (5.1 | ) |  | $ | — |  |  | $ | 665.7 |
Total assets |  | $ | 12,410.5 |  |  | $ | 1.2 |  |  | $ | 683.7 |  |  | $ | (550.7 | ) |  | $ | 12,544.7 |
Capital expenditures |  | $ | 1,050.9 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 1,050.9 |
2021 |  | Electric Company |  |  | Natural Gas Midstream Operations |  |  | Other Operations |  |  | Eliminations |  |  | Total |
(In millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 3,653.7 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 3,653.7 |
Fuel, purchased power and direct transmission expense |  |  | 2,127.6 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2,127.6 |
Other operation and maintenance |  |  | 464.7 |  |  |  | 1.6 |  |  |  | (3.2 | ) |  |  | — |  |  |  | 463.1 |
Depreciation and amortization |  |  | 416.0 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 416.0 |
Taxes other than income |  |  | 99.3 |  |  |  | 0.2 |  |  |  | 3.3 |  |  |  | — |  |  |  | 102.8 |
Operating income (loss) |  |  | 546.1 |  |  |  | (1.8 | ) |  |  | (0.1 | ) |  |  | — |  |  |  | 544.2 |
Equity in earnings of unconsolidated affiliates |  |  | — |  |  |  | 169.8 |  |  |  | — |  |  |  | — |  |  |  | 169.8 |
Gain on Enable/Energy Transfer transaction, net |  |  | — |  |  |  | 344.4 |  |  |  | — |  |  |  | — |  |  |  | 344.4 |
Other income (expense) |  |  | 7.7 |  |  |  | (26.4 | ) |  |  | (2.0 | ) |  |  | (0.9 | ) |  |  | (21.6 | )
Interest expense |  |  | 152.0 |  |  |  | — |  |  |  | 7.2 |  |  |  | (0.9 | ) |  |  | 158.3 |
Income tax expense (benefit) |  |  | 41.8 |  |  |  | 101.0 |  |  |  | (1.6 | ) |  |  | — |  |  |  | 141.2 |
Net income (loss) |  | $ | 360.0 |  |  | $ | 385.0 |  |  | $ | (7.7 | ) |  | $ | — |  |  | $ | 737.3 |
Total assets |  | $ | 11,688.0 |  |  | $ | 786.6 |  |  | $ | 350.3 |  |  | $ | (218.5 | ) |  | $ | 12,606.4 |
Capital expenditures |  | $ | 778.5 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 778.5 |
2020 |  | Electric Company |  |  | Natural Gas Midstream Operations |  |  | Other Operations |  |  | Eliminations |  |  | Total |
(In millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 2,122.3 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 2,122.3 |
Fuel, purchased power and direct transmission expense |  |  | 644.6 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 644.6 |
Other operation and maintenance |  |  | 464.4 |  |  |  | 1.7 |  |  |  | (3.3 | ) |  |  | — |  |  |  | 462.8 |
Depreciation and amortization |  |  | 391.3 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 391.3 |
Taxes other than income |  |  | 97.2 |  |  |  | 0.4 |  |  |  | 3.8 |  |  |  | — |  |  |  | 101.4 |
Operating income (loss) |  |  | 524.8 |  |  |  | (2.1 | ) |  |  | (0.5 | ) |  |  | — |  |  |  | 522.2 |
Equity in losses of unconsolidated affiliates (A) |  |  | — |  |  |  | (668.0 | ) |  |  | — |  |  |  | — |  |  |  | (668.0 | )
Other income (expense) |  |  | 4.1 |  |  |  | (2.9 | ) |  |  | 3.6 |  |  |  | (1.6 | ) |  |  | 3.2 |
Interest expense |  |  | 154.8 |  |  |  | — |  |  |  | 5.3 |  |  |  | (1.6 | ) |  |  | 158.5 |
Income tax expense (benefit) |  |  | 34.7 |  |  |  | (158.0 | ) |  |  | (4.1 | ) |  |  | — |  |  |  | (127.4 | )
Net income (loss) |  | $ | 339.4 |  |  | $ | (515.0 | ) |  | $ | 1.9 |  |  | $ | — |  |  | $ | (173.7 | )
Investment in unconsolidated affiliates |  | $ | — |  |  | $ | 374.3 |  |  | $ | — |  |  | $ | — |  |  | $ | 374.3 |
Total assets |  | $ | 10,489.0 |  |  | $ | 378.1 |  |  | $ | 116.4 |  |  | $ | (264.7 | ) |  | $ | 10,718.8 |
Capital expenditures |  | $ | 650.5 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 650.5 |
(A) In March 2020, OGE Energy recorded a $780.0 million impairment on its investment in Enable.

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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 https://asc.fasb.org/extlink&oid=126901519&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 https://asc.fasb.org/extlink&oid=126901519&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 https://asc.fasb.org/extlink&oid=126901519&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 https://asc.fasb.org/extlink&oid=126901519&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 https://asc.fasb.org/extlink&oid=126901519&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 https://asc.fasb.org/extlink&oid=126901519&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 https://asc.fasb.org/extlink&oid=126901519&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 https://asc.fasb.org/extlink&oid=126901519&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 https://asc.fasb.org/extlink&oid=126901519&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 https://asc.fasb.org/extlink&oid=126901519&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 https://asc.fasb.org/extlink&oid=126901519&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 https://asc.fasb.org/extlink&oid=126901519&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 https://asc.fasb.org/extlink&oid=126901519&loc=d3e8721-108599 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI https://asc.fasb.org/topic&trid=2134510 + Details
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