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CONSOLIDATED STATEMENTS OF INCOME - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Operating revenues      
Electric $ 11,446 $ 12,123 $ 11,205
Natural Gas 2,645 3,080 2,132
Other 115 107 94
Total operating revenues 14,206 15,310 13,431
Operating expenses      
Electric fuel and purchased power 4,278 5,005 4,733
Cost of natural gas sold and transported 1,456 1,910 1,081
Cost of sales — other 49 44 38
Operating and maintenance expenses 2,444 2,491 2,321
Conservation and demand side management expenses 286 331 304
Depreciation and amortization 2,448 2,413 2,121
Taxes (other than income taxes) 657 688 630
Loss on Comanche Unit 3 litigation 35 0 0
Workforce reduction expenses 72 0 0
Total operating expenses 11,725 12,882 11,228
Operating income 2,481 2,428 2,203
Other income (expense), net 22 (13) 5
Earnings from equity method investments 35 36 62
Allowance for funds used during construction — equity 91 75 73
Interest charges and financing costs      
Interest charges — includes other financing costs of $32, $31 and $29, respectively 1,055 953 842
Allowance for funds used during construction — debt (51) (28) (26)
Total interest charges and financing costs 1,004 925 816
Income before income taxes 1,625 1,601 1,527
Income tax benefit (146) (135) (70)
Net income $ 1,771 $ 1,736 $ 1,597
Weighted average common shares outstanding:      
Basic 552 547 539
Diluted 552 547 540
Earnings per average common share:      
Basic $ 3.21 $ 3.18 $ 2.96
Diluted $ 3.21 $ 3.17 $ 2.96