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Cover
Nov. 24, 2024
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Nov. 24, 2024
Entity File Number 001-13643
Entity Registrant Name ONEOK, Inc.
Entity Central Index Key 0001039684
Entity Tax Identification Number 73-1520922
Entity Incorporation, State or Country Code OK
Entity Address, Address Line One 100 West Fifth Street
Entity Address, City or Town Tulsa
Entity Address, State or Province OK
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
Title of 12(b) Security Common stock, par value of $0.01
Trading Symbol OKE
Security Exchange Name NYSE
Entity Emerging Growth Company false