v3.26.1
CONDENSED INCOME STATEMENTS - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Income Statement [Abstract]        
Operating revenues $ 407.5 $ 410.5 $ 971.8 $ 909.2
Operating expenses        
Cost of sales 116.7 123.5 363.8 313.7
Other operation and maintenance 129.4 121.8 249.5 241.1
Depreciation and amortization 69.4 66.7 138.0 132.5
Property and revenue taxes 12.7 11.0 25.8 22.4
Total operating expenses 328.2 323.0 777.1 709.7
Operating income 79.3 87.5 194.7 199.5
Other income, net 9.5 4.2 17.0 8.5
Interest expense 23.9 24.2 47.7 48.2
Other expense (14.4) (20.0) (30.7) (39.7)
Income before income taxes 64.9 67.5 164.0 159.8
Income tax expense 9.6 12.3 24.8 28.8
Net income $ 55.3 $ 55.2 $ 139.2 $ 131.0