v3.26.3
Average Annual Total Returns
 12 Months Ended 39 Months Ended
Oct. 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Innovator Emerging Markets Power Buffer ETF - October      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Return Before Taxes    
Average Annual Return, Percent   21.97% 5.67%
Performance Inception Date Sep. 30, 2021    
Innovator Emerging Markets Power Buffer ETF - October | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions    
Average Annual Return, Percent   21.97% 5.67%
Innovator Emerging Markets Power Buffer ETF - October | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares    
Average Annual Return, Percent   13.01% 4.41%
MSCI Emerging Markets Total Return Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] MSCI Emerging Markets Total Return Index (reflects no deduction for fees, expenses or taxes)    
Average Annual Return, Percent   33.57% 5.26%
MSCI Emerging Markets Price Return Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] MSCI Emerging Markets Price Return Index (reflects no deduction for fees, expenses or taxes)    
Average Annual Return, Percent   30.58% 2.72%