Document and Entity Information

Document and Entity InformationJun. 02, 2021
Cover [Abstract]
Amendment Flagfalse
Entity Central Index Key0001587732
Document Type8-K
Document Period End DateJun. 2,
Entity Registrant NameONE Gas, Inc.
Entity Incorporation State Country CodeOK
Entity File Number001-36108
Entity Tax Identification Number46-3561936
Entity Address, Address Line One15 East Fifth Street
Entity Address, City or TownTulsa
Entity Address, State or ProvinceOK
Entity Address, Postal Zip Code74103
City Area Code(918)
Local Phone Number947-7000
Written Communicationsfalse
Soliciting Materialfalse
Pre Commencement Tender Offerfalse
Pre Commencement Issuer Tender Offerfalse
Security 12b TitleCommon Stock, par value $0.01 per share
Trading SymbolOGS
Security Exchange NameNYSE
Entity Emerging Growth Companyfalse