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EMPLOYEE BENEFIT PLANS - Plan Assets (Details) | 12 Months Ended
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Dec. 31, 2024
Retirement Benefits [Abstract] |
Domestic and international equities | 32.00%
Long duration fixed income | 55.00%
Return-seeking credit | 5.00%
Hedge funds | 5.00%
Real estate funds | 3.00%
Total | 100.00%

X
- Definition Target allocation percentage in hedge fund investments to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position. + References No definition available. + Details
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X
- Definition Target allocation percentage in long duration fixed income securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position. + References No definition available. + Details
Name: | oke_DefinedBenefitPlanTargetAllocationPercentageOfAssetsLongDurationFixedIncome
Namespace Prefix: | oke_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Target allocation percentage in global real estate investments to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

X
- Definition Target allocation percentage in return-seeking credit securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

X
- Definition Target allocation percentage to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position. + References No definition available. + Details
Name: | oke_DefinedBenefitPlanTargetAllocationPercentageOfAssetsTotal
Namespace Prefix: | oke_
Data Type: | dtr-types1:percentItemType
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Period Type: | duration

X
- Definition Target allocation percentage in domestic and international equity securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position. + References No definition available. + Details
Name: | oke_DefinedBenefitPlanTargetAllocationPercentageofAssetsDomesticandInternationalEquities
Namespace Prefix: | oke_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
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