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Consolidated Statements of Income - USD ($)
shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Revenues, net $ 2,425 $ 2,151 $ 2,121
Alternative revenue programs, net of amortization (29) (6) 2
Total Revenues 2,396 2,145 2,123
Operating expenses:      
Purchased power and fuel 822 708 614
Generation, transmission and distribution 310 293 323
Administrative and other 336 283 290
Depreciation and amortization 404 454 409
Taxes other than income taxes 146 138 134
Total operating expenses 2,018 1,876 1,770
Income from operations 378 269 353
Interest expense, net 137 136 128
Other income:      
Allowance for equity funds used during construction 17 16 10
Miscellaneous income, net 9 6 6
Other income, net 26 22 16
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total 267 155 241
Income tax expense 23 0 27
Net income $ 244 $ 155 $ 214
Weighted-average shares outstanding (in thousands):      
Basic 89,481 89,485 89,353
Diluted 89,627 89,645 89,559
Earnings per share:      
Basic $ 2.72 $ 1.73 $ 2.39
Diluted $ 2.72 $ 1.72 $ 2.39