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Cover
Mar. 08, 2021
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Mar. 08, 2021
Entity File Number 1-13948
Entity Registrant Name SCHWEITZER-MAUDUIT INTERNATIONAL, INC.
Entity Central Index Key 0001000623
Entity Tax Identification Number 62-1612879
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 100 North Point Center East
Entity Address, Address Line Two Suite 600
Entity Address, City or Town Alpharetta
Entity Address, State or Province GA
Entity Address, Postal Zip Code 30022
City Area Code 800
Local Phone Number 514-0186
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.10 par value
Trading Symbol SWM
Security Exchange Name NYSE
Entity Information, Former Legal or Registered Name Not Applicable