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Goodwill (CenterPoint Energy and CERC) (Tables)
 9 Months Ended
Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
CenterPoint Energy’s goodwill by reportable segment is as follows:
December 31, 2023Held For SaleSeptember 30, 2024
(in millions)
Electric (1)$936 $— $936 
Natural gas (2)
2,920 217 2,703 
Corporate and other
304 — 304 
Total$4,160 $217 $3,943 
(1)Amount presented is net of the accumulated goodwill impairment charge of $185 million recorded in 2020.
(2)If a disposal group reflects a component of a reporting unit and meets the definition of a business, the goodwill within that reporting unit is allocated to the disposal group based on the relative fair value of the components representing a business that will be retained and disposed. As a result, goodwill attributable to the Louisiana and Mississippi natural gas LDC businesses to be disposed of was classified as held for sale as of September 30, 2024. CenterPoint Energy did not recognize any goodwill impairments within the Natural Gas reportable segment during the nine months ended September 30, 2024. For further information, see Note 3.

CERC’s goodwill is as follows:
December 31, 2023Held For SaleSeptember 30, 2024
(in millions)
Goodwill (1)
$1,583 $122 $1,461 
(1)In connection with the classification of the Louisiana and Mississippi natural gas LDC businesses as held for sale as of September 30, 2024 described above, goodwill attributable to CERC to be disposed of as part of the transaction was classified as held for sale as of September 30, 2024. CERC did not recognize any goodwill impairments during the nine months ended September 30, 2024. For further information, see Note 3.