v3.25.2
Form N-1A Cover
Dec. 31, 2024
Prospectus [Line Items]  
Document Type 497
Amendment Flag false
Registrant Name TRANSAMERICA SERIES TRUST
Entity Central Index Key 0000778207
Entity Investment Company Type N-1A
Document Period End Date Dec. 31, 2024
Prospectus Date May 01, 2025