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Segment financial information (Tables)
12 Months Ended
Dec. 31, 2024
Segment Reporting [Abstract]  
Schedule of Segment Financial Information
Electric utility reportable segment and All Other information were as follows:
(in thousands)Electric utility
All Other
Total
2024   
Revenues$3,206,700 $13,150 $3,219,850 
Depreciation and amortization282,970 10,563 293,533 
Interest income6,633 12,729 19,362 
Interest expense, net82,082 45,125 127,207 
Loss from continuing operations before income taxes
(1,663,914)(127,681)(1,791,595)
Income tax benefit
(439,547)(31,415)(470,962)
Loss from continuing operations
(1,224,367)(96,266)(1,320,633)
Preferred stock dividends of subsidiaries1,995 (105)1,890 
Loss from continuing operations for common stock
(1,226,362)(96,161)(1,322,523)
Capital expenditures1
329,479 14,772 344,251 
Assets (at December 31, 2024)7,613,604 1,317,812 8,931,416 
2023   
Revenues$3,269,521 $17,982 $3,287,503 
Depreciation and amortization270,195 12,111 282,306 
Interest income6,454 2,651 9,105 
Interest expense, net86,140 39,392 125,532 
Income (loss) from continuing operations before income taxes
247,140 (64,840)182,300 
Income tax expense (benefit)
51,193 (16,659)34,534 
Income (loss) from continuing operations
195,947 (48,181)147,766 
Preferred stock dividends of subsidiaries1,995 (105)1,890 
Income (loss) from continuing operations for common stock
193,952 (48,076)145,876 
Capital expenditures1
438,775 3,952 442,727 
Assets (at December 31, 2023)7,283,554 393,818 7,677,372 
2022   
Revenues from external customers$3,408,583 $12,334 $3,420,917 
Intersegment revenues (eliminations)(4)— 
Revenues3,408,587 12,330 3,420,917 
Depreciation and amortization260,744 9,661 270,405 
Interest expense, net76,416 26,986 103,402 
Income (loss) from continuing operations before income taxes
240,600 (38,646)201,954 
Income tax expense (benefit)
49,676 (10,761)38,915 
Income (loss) from continuing operations
190,924 (27,885)163,039 
Preferred stock dividends of subsidiaries1,995 (105)1,890 
Income (loss) from continuing operations for common stock
188,929 (27,780)161,149 
Capital expenditures1
329,457 9,876 339,333 
1    Contributions in aid of construction balances are included in capital expenditures.