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COMMITMENTS AND CONTINGENCIES (Details)	6 Months Ended
	Jun. 30, 2024 individual action
Commitments and Contingencies Disclosure [Abstract]
Number of actions | action	3
Number of individuals | individual	7

X

- Definition

Loss Contingency, Number Of Actions

+ References

No definition available.

+ Details

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Namespace Prefix:	oke_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Loss Contingency, Number Of Individuals That Filed Claims

+ References

No definition available.

+ Details

Name:	oke_LossContingencyNumberOfIndividualsThatFiledClaims
Namespace Prefix:	oke_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration