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Document and Entity Information
May 14, 2023
Cover [Abstract]  
Entity Registrant Name ONEOK INC /NEW/
Entity Address, State or Province OK
Amendment Flag false
Entity Central Index Key 0001039684
Document Type 8-K
Document Period End Date May 14, 2023
Entity Incorporation State Country Code OK
Entity File Number 001-13643
Entity Tax Identification Number 73-1520922
Entity Address, Address Line One 100 West Fifth Street
Entity Address, City or Town Tulsa
Entity Address, Postal Zip Code 74103
City Area Code (918)
Local Phone Number 588-7000
Written Communications true
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common stock, par value of $0.01
Trading Symbol OKE
Security Exchange Name NYSE
Entity Emerging Growth Company false