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Cover
May 14, 2024
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date May 14, 2024
Current Fiscal Year End Date --10-31
Entity File Number 811-21484
Entity Registrant Name Calamos Strategic Total Return Fund
Entity Central Index Key 0001275214
Entity Tax Identification Number 04-3785941
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 2020 Calamos Court
Entity Address, City or Town Naperville
Entity Address, State or Province IL
Entity Address, Postal Zip Code 60563
City Area Code 630
Local Phone Number 245-7200
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Shares
Trading Symbol CSQ
Security Exchange Name NASDAQ
Entity Emerging Growth Company false