v3.26.3
Average Annual Total Returns
 2 Months Ended 12 Months Ended
Oct. 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Innovator U.S. Small Cap Power Buffer ETF - November      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Return Before Taxes    
Average Annual Return, Percent   11.85% 12.29%
Performance Inception Date Oct. 31, 2024    
Innovator U.S. Small Cap Power Buffer ETF - November | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions    
Average Annual Return, Percent   11.85% 12.29%
Innovator U.S. Small Cap Power Buffer ETF - November | 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   9.05% 7.27%
Russell 2000 Total Return Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Russell 2000 Total Return Index (reflects no deduction for fees, expenses or taxes)    
Average Annual Return, Percent   12.59% 12.81%
Russell 2000 Price Return Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Russell 2000 Price Return Index (reflects no deduction for fees, expenses or taxes)    
Average Annual Return, Percent   11.03% 11.29%