XML 86 R62.htm IDEA: XBRL DOCUMENT
v3.23.3

Background and Basis of Presentation (Details) | Sep. 30, 2023 registrant
--- | ---
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Number of registrants | 3

X
- Definition Number of registrants + References No definition available. + Details
Name: | cnp_NumberOfRegistrants
Namespace Prefix: | cnp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration