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Business Segment Information (Tables) | 3 Months Ended
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Mar. 31, 2024
Segment Reporting Information, Additional Information [Abstract] |
Segment information included in Consolidated Statements of Income | Segment information was as follows (in millions):
| Electric Utilities |  | Gas Utilities |  | Corporate and Other |  | Total |
Three Months Ended March 31, 2024 |  |  |  |  |  |  |  |
External revenues | $ | 219.3 |  | $ | 507.1 |  | $ | - |  | $ | 726.4 |
Inter-segment revenues |  | 2.9 |  |  | 1.6 |  |  | (4.5 | ) |  | - |
Operating income |  | 64.6 |  |  | 130.8 |  |  | (2.1 | ) |  | 193.3 |
Capital expenditures (a) |  | 86.9 |  |  | 85.0 |  |  | 2.4 |  |  | 174.3 |
Three Months Ended March 31, 2023 |  |  |  |  |  |  |  |
External revenues | $ | 215.9 |  | $ | 705.3 |  | $ | - |  | $ | 921.2 |
Inter-segment revenues |  | 2.8 |  |  | 1.6 |  |  | (4.4 | ) |  | - |
Operating income |  | 61.1 |  |  | 114.6 |  |  | (0.8 | ) |  | 174.9 |
Capital expenditures (a) |  | 47.8 |  |  | 54.8 |  |  | 1.1 |  |  | 103.7 |
(a) Includes accruals for property, plant and equipment as disclosed in supplemental cash flow information in the Consolidated Statements of Cash Flows in the Consolidated Financial Statements.

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482573/350-20-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-25 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-30 + Details
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