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Earnings Per Share (CenterPoint Energy) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Numerator: |  |  |  |
Income from continuing operations | $ 282 | $ 202 | $ 725 | $ 923
Less: Preferred stock dividend requirement (Note 18) | 26 | 13 | 50 | 37
Income available to common shareholders - basic | 256 | 189 | 675 | 886
Income available to common shareholders -diluted | $ 256 | $ 189 | $ 675 | $ 886
Denominator: |  |  |  |
Weighted average common shares outstanding - basic (in shares) | 631,185 | 629,509 | 630,854 | 629,374
Plus: Incremental shares from assumed conversions: |  |  |  |
Weighted average common shares outstanding - diluted (in shares) | 633,043 | 633,068 | 633,037 | 632,933
Earnings Per Common Share: |  |  |  |
Basic Earnings Per Common Share (in dollars per share) | $ 0.41 | $ 0.30 | $ 1.07 | $ 1.41
Diluted Earnings (Loss) Per Common Share |  |  |  |
Diluted Earnings Per Common Share (in dollars per share) | $ 0.40 | $ 0.30 | $ 1.07 | $ 1.40
Restricted stock |  |  |  |
Plus: Incremental shares from assumed conversions: |  |  |  |
Restricted stock (in shares) | 1,858 | 3,559 | 2,183 | 3,559

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