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Condensed Statements of Consolidated Income (Unaudited) - CERC - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Revenues:        
Utility revenues $ 1,842 $ 1,849 $ 6,341 $ 6,355
Non-utility revenues 14 11 40 159
Total 1,856 1,860 6,381 6,514
Expenses:        
Utility natural gas 197 192 1,217 1,550
Non-utility cost of revenues, including natural gas 1 1 2 98
Operation and maintenance 775 648 2,162 1,990
Depreciation and amortization 334 374 1,083 1,042
Taxes other than income taxes 125 127 410 395
Total 1,432 1,342 4,874 5,075
Operating Income 424 518 1,507 1,439
Other Income (Expense):        
Interest expense and other finance charges (191) (176) (601) (489)
Other income, net 15 13 39 39
Total (179) (168) (573) (469)
Income Before Income Taxes 245 350 934 970
Income tax expense 52 68 163 245
Net Income 193 282 771 725
CERC        
Revenues:        
Utility revenues 589 574 2,757 3,014
Non-utility revenues 11 9 34 31
Total 600 583 2,791 3,045
Expenses:        
Utility natural gas 140 141 1,046 1,399
Non-utility cost of revenues, including natural gas 1 1 2 2
Operation and maintenance 207 187 614 616
Depreciation and amortization 124 125 389 365
Taxes other than income taxes 51 53 176 181
Total 523 507 2,227 2,563
Operating Income 77 76 564 482
Other Income (Expense):        
Interest expense and other finance charges (38) (44) (145) (131)
Other income, net 4 6 10 12
Total (34) (38) (135) (119)
Income Before Income Taxes 43 38 429 363
Income tax expense 9 10 84 80
Net Income $ 34 $ 28 $ 345 $ 283