v3.26.1
Average Annual Total Returns
 6 Months Ended 12 Months Ended
Oct. 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Innovator International Developed 10 Buffer ETF - Quarterly      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Return Before Taxes    
Average Annual Return, Percent   10.77% 13.41%
Performance Inception Date Jun. 28, 2024    
Innovator International Developed 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   10.77% 13.41%
Innovator International Developed 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   8.26% 7.94%
MSCI EAFE Total Return Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] MSCI EAFE Total Return Index (reflects no deduction for fees, expenses or taxes)    
Average Annual Return, Percent   18.58% 31.22%
MSCI EAFE Price Return Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] MSCI EAFE Price Return Index (reflects no deduction for fees, expenses or taxes)    
Average Annual Return, Percent   15.91% 27.89%