XML 83 R40.htm IDEA: XBRL DOCUMENT
v3.25.1

RISK-MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES -Schedule of Notional Quantities for Derivative Instruments (Details) - Sold / Receiver - Futures and Swaps | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 MMBbls Bcf | Dec. 31, 2024 MMBbls Bcf
Fixed price | - Natural gas (Bcf) | Derivatives designated as hedging instruments: |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, volume | 8.3 | 12.2
Fixed price | - Natural gas (Bcf) | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, volume | 6.7 | 8.0
Fixed price | - NGLs, Refined Products and crude oil (MMBbl) | Derivatives designated as hedging instruments: |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, volume | MMBbls | 21.9 | 12.2
Fixed price | - NGLs, Refined Products and crude oil (MMBbl) | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, volume | MMBbls | 1.7 | 2.7
Basis | - Natural gas (Bcf) | Derivatives designated as hedging instruments: |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, volume | 7.0 | 11.2
Basis | - Natural gas (Bcf) | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, volume | 6.3 | 3.7
Basis | - NGLs, Refined Products and crude oil (MMBbl) | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, volume | MMBbls | 0.1 | 0.2
Swing Swaps | - Natural gas (Bcf) | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, volume | 1.7 | 0.2

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal volume used to calculate payments on a derivative instrument. + References No definition available. + Details
Name: | us-gaap_DerivativeNonmonetaryNotionalAmountVolume
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | oke_DerivativeInstrumentByMethodForSettingNotionalAmountAxis=oke_FixedPriceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | oke_DerivativePositonByTransactionTypeAxis=oke_SellorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | oke_DerivativesByCommodityAxis=srt_NaturalGasReservesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=oke_FuturesAndSwapsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | oke_DerivativesByCommodityAxis=srt_CrudeOilAndNGLPerBarrelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | oke_DerivativeInstrumentByMethodForSettingNotionalAmountAxis=oke_BasisMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | oke_DerivativeInstrumentByMethodForSettingNotionalAmountAxis=oke_SwingSwapsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |