XML 97 R62.htm IDEA: XBRL DOCUMENT v3.25.1

Revenue Recognition - Schedule of Contract With Customers (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)
Accounts Receivable (1)
Opening balance as of December 31, 2024	$ 666
Closing balance as of March 31, 2025	779
Increase (decrease) in accounts receivable	113
Accrued Unbilled Revenues
Opening balance as of December 31, 2024	521
Closing balance as of March 31, 2025	403
Increase (decrease) in other accrued unbilled revenues	(118)
Houston Electric
Accounts Receivable (1)
Opening balance as of December 31, 2024	284
Closing balance as of March 31, 2025	264
Increase (decrease) in accounts receivable	(20)
Accrued Unbilled Revenues
Opening balance as of December 31, 2024	137
Closing balance as of March 31, 2025	126
Increase (decrease) in other accrued unbilled revenues	(11)
CERC
Accounts Receivable (1)
Opening balance as of December 31, 2024	326
Closing balance as of March 31, 2025	457
Increase (decrease) in accounts receivable	131
Accrued Unbilled Revenues
Opening balance as of December 31, 2024	338
Closing balance as of March 31, 2025	230
Increase (decrease) in other accrued unbilled revenues	$ (108)

X

- Definition

Accounts Receivable For Contracts With Customers

+ References

No definition available.

+ Details

Name:	cnp_AccountsReceivableForContractsWithCustomers
Namespace Prefix:	cnp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Change in Accounts Receivable [Roll Forward]

+ References

No definition available.

+ Details

Name:	cnp_ChangeinAccountsReceivableRollForward
Namespace Prefix:	cnp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Change in Other Accrued Unbilled Revenues [Roll Forward]

+ References

No definition available.

+ Details

Name:	cnp_ChangeinOtherAccruedUnbilledRevenuesRollForward
Namespace Prefix:	cnp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Increase (Decrease) In Accounts Receivable On Contracts With Customers

+ References

No definition available.

+ Details

Name:	cnp_IncreaseDecreaseInAccountsReceivableOnContractsWithCustomers
Namespace Prefix:	cnp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Increase (Decrease) In Contract With Customer, Asset, Other Accrued Unbilled Receivables

+ References

No definition available.

+ Details

Name:	cnp_IncreaseDecreaseInContractWithCustomerAssetOtherAccruedUnbilledReceivables
Namespace Prefix:	cnp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 912
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478345/912-310-45-2

+ Details

Name:	us-gaap_UnbilledContractsReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	dei_LegalEntityAxis=cnp_HoustonElectricMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=cnp_CercCorpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: