v3.25.2
Average Annual Total Returns
 12 Months Ended 30 Months Ended
Oct. 31, 2024
Dec. 31, 2023
Dec. 31, 2023
Innovator U.S. Equity Accelerated 9 Buffer ETF - July      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Return Before Taxes    
Average Annual Return, Percent   11.76% 8.50%
Performance Inception Date Jun. 30, 2021    
Innovator U.S. Equity Accelerated 9 Buffer ETF - July | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions    
Average Annual Return, Percent   11.76% 8.50%
Innovator U.S. Equity Accelerated 9 Buffer ETF - July | 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   6.96% 6.63%
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   25.02% 11.05%
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   23.31% 9.37%