v3.26.1
Average Annual Total Returns
 6 Months Ended 12 Months Ended
Oct. 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Innovator Nasdaq-100 10 Buffer ETF - Quarterly      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Return Before Taxes    
Average Annual Return, Percent   11.45% 10.92%
Performance Inception Date Jun. 28, 2024    
Innovator Nasdaq-100 10 Buffer ETF - Quarterly | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions    
Average Annual Return, Percent   11.45% 10.92%
Innovator Nasdaq-100 10 Buffer ETF - Quarterly | 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   8.78% 6.47%
Nasdaq-100® Total Return Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Nasdaq-100® Total Return Index (reflects no deduction for fees, expenses or taxes)    
Average Annual Return, Percent   18.79% 21.02%
Nasdaq-100® Price Return Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Nasdaq-100® Price Return Index (reflects no deduction for fees, expenses or taxes)    
Average Annual Return, Percent   17.94% 20.17%