v3.26.3
Health Sciences Trust N-1A Cover
Dec. 31, 2025
Prospectus [Line Items]  
Document Type 497
Amendment Flag false
Registrant Name John Hancock Variable Insurance Trust
Entity Central Index Key 0000756913
Entity Investment Company Type N-1A
Document Period End Date Dec. 31, 2025
Prospectus Date Apr. 27, 2026