XML 14 R1.htm IDEA: XBRL DOCUMENT v3.23.3
Cover
 6 Months Ended
Jun. 30, 2023
Document Information [Line Items]  
Document Type S-1
Entity Registrant Name Knife River Corporation
Entity Incorporation, State or Country Code DE
Entity Primary SIC Number 1400
Entity Tax Identification Number 92-1008893
Entity Address, Address Line One 1150 West Century Avenue
Entity Address, Address Line Two P.O. Box 5568
Entity Address, City or Town Bismarck
Entity Address, State or Province ND
Entity Address, Postal Zip Code 58506-5568
City Area Code 701
Local Phone Number 530-1400
Contact Personnel Name Karl L. Liepitz
Entity Filer Category Non-accelerated Filer
Entity Small Business false
Entity Emerging Growth Company false
Entity Central Index Key 0001955520
Amendment Flag false