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Document and Entity Information Document
Mar. 07, 2022
Cover [Abstract]  
Document Type 8-K
Document Period End Date Mar. 07, 2022
Entity Registrant Name KAR Auction Services, Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 001-34568
Entity Tax Identification Number 20-8744739
Entity Address, Address Line One 11299 N. Illinois Street
Entity Address, City or Town Carmel
Entity Address, State or Province IN
Entity Address, Postal Zip Code 46032
City Area Code 800
Local Phone Number 923-3725
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Title of 12(b) Security Common Stock, par value $0.01 per share
Trading Symbol KAR
Security Exchange Name NYSE
Entity Central Index Key 0001395942
Amendment Flag false