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