XML 97 R54.htm IDEA: XBRL DOCUMENT
v3.22.0.1

RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES - Part 2 (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2021 USD ($) Bcf MMBbls | Dec. 31, 2020 USD ($) MMBbls Bcf
Derivative [Line Items] |  |  |  |
Realized Loss on Settled Interest Rate Swaps Recorded in AOCI | $ 48.3 | $ 152.5 |  | $ 48.3
Notional Amount Of Cash Flow Hedge Instruments Settled | $ 1,300.0 | 750.0 |  | 1,300.0
Derivatives designated as hedging instruments | Interest Rate Contract | Purchased/Payor |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount |  |  | $ 1,100.0 | $ 1,100.0
Derivatives designated as hedging instruments | Future | Natural gas (Bcf) | Fixed price | Sold/Receiver |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume | Bcf |  |  | 32.3 | 43.3
Derivatives designated as hedging instruments | Future | Natural gas (Bcf) | Basis | Sold/Receiver |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume | Bcf |  |  | 30.5 | 43.3
Derivatives designated as hedging instruments | Future | Crude oils and NGLs (MMBbl) | Fixed price | Sold/Receiver |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume | MMBbls |  |  | 10.0 | 4.6
Derivatives not designated as hedging instruments | Future | Crude oils and NGLs (MMBbl) | Fixed price | Purchased/Payor |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume | MMBbls |  |  | 0.8 |
Derivatives not designated as hedging instruments | Future | Crude oils and NGLs (MMBbl) | Fixed price | Sold/Receiver |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Nonmonetary Notional Amount, Volume | MMBbls |  |  | 0.8 |
Forecasted Debt Issuances [Member] | Cash Flow Hedging [Member] | Forward contracts | Interest Rate Contract |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount |  |  | $ 1,100.0 | $ 1,100.0
Notes Payable from Public Offering Due 2025, 2030 and 2050 [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Senior Notes, Noncurrent |  | $ 1,750.0 |  |

X
- Definition Aggregate notional amount specified by the settled derivative(s) designated as cash flow hedge instruments, expressed as an absolute value + References No definition available. + Details
Name: | oke_NotionalAmountOfCashFlowHedgeInstrumentsSettled
Namespace Prefix: | oke_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Realized Loss resulting from the settlement of interes rate swaps designated as cash flow hedges recorded in accumulated other comprehensive income (loss). + References No definition available. + Details
Name: | oke_RealizedLossonSettledInterestRateSwapsRecordedinAOCI
Namespace Prefix: | oke_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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 No definition available. + 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
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959 + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 + Details
Name: | us-gaap_SeniorLongTermNotes
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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

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

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

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=oke_ForecastedDebtIssuancesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oke_NotesPayablefromPublicOfferingDue20252030and2050Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |