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Consolidated Statement of Income (Loss) and Comprehensive Income - USD ($) shares in Millions, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Operating Revenues: |  |
Total operating revenues | $ 1,816 | $ 2,062
Operating Expenses: |  |
Fuel and purchased power | 328 | 608
Natural gas purchased for resale | 151 | 208
Other operations and maintenance | 470 | 448
Depreciation and amortization | 361 | 320
Taxes other than income taxes | 135 | 127
Total operating expenses | 1,445 | 1,711
Operating Income | 371 | 351
Other Income, Net | 89 | 78
Interest Charges | 154 | 127
Income Before Income Taxes | 306 | 302
Income Taxes | 44 | 37
Net Income | 262 | 265
Less: Net Income Attributable to Noncontrolling Interests | 1 | 1
Net Income Attributable to Ameren Common Shareholders | 261 | 264
Pension and other postretirement benefit plan activity, net of income taxes (benefit) | (1) | (1)
Comprehensive Income | 261 | 264
Less: Comprehensive Income Attributable to Noncontrolling Interests | 1 | 1
Comprehensive Income Attributable to Ameren Common Shareholders | $ 260 | $ 263
Earnings Per Share, Basic [Abstract] |  |
Earnings per Common Share – Basic | $ 0.98 | $ 1.01
Earnings Per Share, Diluted [Abstract] |  |
Earnings per Common Share – Diluted | $ 0.98 | $ 1.00
Weighted-average Common Shares Outstanding – Basic | 266.4 | 262.2
Weighted-average Common Shares Outstanding – Diluted | 266.8 | 263.1
Electric |  |
Operating Revenues: |  |
Total operating revenues | $ 1,364 | $ 1,590
Natural gas |  |
Operating Revenues: |  |
Total operating revenues | 452 | 472
Union Electric Company |  |
Operating Revenues: |  |
Total operating revenues | 775 | 923
Operating Expenses: |  |
Fuel and purchased power | 166 | 321
Natural gas purchased for resale | 28 | 47
Other operations and maintenance | 254 | 239
Depreciation and amortization | 195 | 176
Taxes other than income taxes | 87 | 80
Total operating expenses | 730 | 863
Operating Income | 45 | 60
Other Income, Net | 44 | 19
Interest Charges | 62 | 51
Income Before Income Taxes | 27 | 28
Income Taxes | 1 | (1)
Net Income | 26 | 29
Preferred Stock Dividends | 1 | 1
Net Income Attributable to Parent | 25 | 28
Union Electric Company | Electric |  |
Operating Revenues: |  |
Total operating revenues | 714 | 841
Union Electric Company | Natural gas |  |
Operating Revenues: |  |
Total operating revenues | 61 | 82
Ameren Illinois Company |  |
Operating Revenues: |  |
Total operating revenues | 1,000 | 1,101
Operating Expenses: |  |
Purchased Power | 164 | 287
Natural gas purchased for resale | 123 | 161
Other operations and maintenance | 210 | 202
Depreciation and amortization | 153 | 133
Taxes other than income taxes | 44 | 42
Total operating expenses | 694 | 825
Operating Income | 306 | 276
Other Income, Net | 31 | 37
Interest Charges | 55 | 47
Income Before Income Taxes | 282 | 266
Income Taxes | 67 | 68
Net Income | 215 | 198
Net Income Attributable to Parent | 215 | 198
Ameren Illinois Company | Electric |  |
Operating Revenues: |  |
Total operating revenues | 609 | 710
Ameren Illinois Company | Natural gas |  |
Operating Revenues: |  |
Total operating revenues | $ 391 | $ 391

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