v3.25.2
Form N-1A Cover
May 31, 2025
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name Nuveen Multistate Trust IV
Entity Central Index Key 0001018973
Entity Investment Company Type N-1A
Document Period End Date May 31, 2025
Prospectus Date Sep. 30, 2025