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CONDENSED CONSOLIDATED INCOME STATEMENTS - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Income Statement [Abstract]        
Operating revenues $ 1,863.5 $ 1,957.4 $ 6,315.7 $ 6,675.5 Close
Operating expenses        
Cost of sales 520.8 587.4 1,917.6 2,430.1
Other operation and maintenance 566.8 516.6 1,631.0 1,546.6
Depreciation and amortization 340.5 320.3 1,010.5 939.7
Property and revenue taxes 51.7 61.1 194.7 192.5
Total operating expenses 1,479.8 1,485.4 4,753.8 5,108.9 Close
Operating income 383.7 472.0 1,561.9 1,566.6 Close
Equity in earnings of transmission affiliates 46.7 44.7 138.3 132.1 Close
Other income, net 44.0 41.8 128.7 130.9 CloseClose
Interest expense 204.2 182.5 596.8 533.4 Close
Other expense (113.5) (96.0) (329.8) (270.4) Close
Total Other Income Expenses 181.4 173.0 534.0 526.0 0.0 Close
Income before income taxes 270.2 376.0 1,232.1 1,296.2 CloseClose
Income tax expense 31.6 60.4 160.9 183.0 Close
Net income 238.6 315.6 1,071.2 1,113.2 Close
Preferred stock dividends of subsidiary 0.3 0.3 0.9 0.9
Net loss attributed to noncontrolling interests 1.8 0.7 3.4 0.9
Net income attributed to common shareholders $ 240.1 $ 316.0 $ 1,073.7 $ 1,113.2
Earnings per share        
Basic (in dollars per share) $ 0.76 $ 1.00 $ 3.40 $ 3.53
Diluted (in dollars per share) $ 0.76 $ 1.00 $ 3.40 $ 3.52
Weighted average common shares outstanding        
Basic (in shares) 316.2 315.4 315.9 315.4
Diluted (in shares) 316.5 315.8 316.2 315.9