v3.26.3
Form N-1A Cover
Jun. 30, 2026
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name PUTNAM VARIABLE TRUST
Entity Central Index Key 0000822671
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
Prospectus Date Oct. 05, 2026