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Equity (CenterPoint Energy) - Schedule of Dividends Declared and Dividends Paid (Details) - $ / shares
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Common stock, dividends declared per share (in dollars per share) $ 0.830 $ 0.780 $ 0.720
Common Stock dividends paid per share (in dollars per share) 0.810 0.770 0.700
Series A Preferred Stock      
Preferred stock, dividends declared (in dollars per share) 0 30.625 61.250
Preferred stock dividends paid per share (in dollars per share) $ 0 $ 61.250 $ 61.250