v3.26.1
Average Annual Total Returns
 12 Months Ended 45 Months Ended
Oct. 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Innovator U.S. Equity Accelerated 9 Buffer ETF - April      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Return Before Taxes    
Average Annual Return, Percent   13.21% 9.26%
Performance Inception Date Mar. 31, 2021    
Innovator U.S. Equity Accelerated 9 Buffer ETF - April | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions    
Average Annual Return, Percent   13.21% 9.26%
Innovator U.S. Equity Accelerated 9 Buffer ETF - April | 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   7.82% 7.32%
S&P 500® Total Return Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] S&P 500® Total Return Index (reflects no deduction for fees, expenses or taxes)    
Average Annual Return, Percent   17.88% 13.78%
S&P 500® Price Return Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] S&P 500® Price Return Index (reflects no deduction for fees, expenses or taxes)    
Average Annual Return, Percent   16.39% 12.13%