v3.25.2
Form N-1A Cover
Jul. 11, 2025
Prospectus [Line Items]  
Document Type 497
Amendment Flag false
Registrant Name AIM INVESTMENT SECURITIES FUNDS (INVESCO INVESTMENT SECURITIES FUNDS)
Entity Central Index Key 0000842790
Entity Investment Company Type N-1A
Document Period End Date Jul. 11, 2025
Prospectus Date Jun. 27, 2025