Document and Entity Information
Dec. 16, 2020
Cover [Abstract]  
Entity Registrant Name OLIN CORPORATION
Entity Central Index Key 0000074303
Document Type 8-K
Amendment Flag false
Document Period End Date Dec. 16, 2020
Entity Incorporation, State or Country Code VA
Entity File Number 1-1070
Entity Tax Identification Number 13-1872319
Entity Address, Address Line One 190 Carondelet Plaza,
Entity Address, Address Line Two Suite 1530
Entity Address, City or Town Clayton,
Entity Address, State or Province MO
Entity Address, Postal Zip Code 63105
City Area Code 314
Local Phone Number 480-1400
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $1.00 par value per share
Trading Symbol OLN
Security Exchange Name NYSE
Entity Emerging Growth Company false