0001227654 2021-07-01 2021-07-01 0001227654 true 8-K/A 2021-07-01 Compass Minerals International, Inc. DE 001-31921 36-3972986 9900 West 109th Street Suite 100 Overland Park KS 66210 913 344-9200 false false false false Common stock, $0.01 par value CMP NYSE false