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Document and Entity Information
Jul. 26, 2024
Document And Entity Information [Line Items]  
Document Type 8-K
Document Period End Date Jul. 26, 2024
Entity Registrant Name TCW STRATEGIC INCOME FUND INC
Entity Incorporation State Country Code MD
Entity File Number 811-04980
Entity Tax Identification Number 93-0939398
Entity Address Address Line 1 515 South Flower Street
Entity Address City Or Town Los Angeles
Entity Address State Or Province CA
Entity Address Postal Zip Code 90071
City Area Code 213
Local Phone Number 244-0000
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common stock, $0.01 par value
Trading Symbol TSI
Security Exchange Name NYSE
Entity Emerging Growth Company false
Entity Central Index Key 0000809559
Amendment Flag false
Former Address [Member]  
Document And Entity Information [Line Items]  
Entity Address Address Line 1 865 S. Figueroa
Entity Address Address Line 2 Suite 1800
Entity Address City Or Town Los Angeles
Entity Address State Or Province CA
Entity Address Postal Zip Code 90017