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CONDENSED CONSOLIDATED INCOME STATEMENTS - USD ($)
shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Income Statement [Abstract]    
Operating revenues $ 2,680.2 $ 2,888.1 Close
Operating expenses    
Cost of sales 927.1 1,309.7
Other operation and maintenance 530.8 534.0
Depreciation and amortization 333.4 305.5
Property and revenue taxes 75.5 69.6
Total operating expenses 1,866.8 2,218.8 Close
Operating income 813.4 669.3 Close
Equity in earnings of transmission affiliates 44.8 43.8 Close
Other income, net 44.1 40.8 CloseClose
Interest expense 192.0 172.2 Close
Other expense (103.1) (87.6) Close
Total Other Income Expenses 177.8 169.2 0.0 0 0 Close
Income before income taxes 710.3 581.7 CloseClose
Income tax expense 87.7 74.1 Close
Net income 622.6 507.6 Close
Preferred stock dividends of subsidiary 0.3 0.3
Net loss attributed to noncontrolling interests 0.0 0.2
Net income attributed to common shareholders $ 622.3 $ 507.5
Earnings per share    
Basic (in dollars per share) $ 1.97 $ 1.61
Diluted (in dollars per share) $ 1.97 $ 1.61
Weighted average common shares outstanding    
Basic (in shares) 315.6 315.4
Diluted (in shares) 315.9 315.9