v3.26.1
Average Annual Total Returns
 12 Months Ended 54 Months Ended 60 Months Ended
Oct. 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Innovator Growth-100 Power Buffer ETF - July        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return Before Taxes      
Average Annual Return, Percent   15.80% 11.15% 10.21%
Performance Inception Date Jun. 30, 2020      
Innovator Growth-100 Power 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   15.80% 11.15% 10.21%
Innovator Growth-100 Power 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   9.36% 8.93% 8.11%
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   21.02% 18.92% 15.30%
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   20.17% 17.99% 14.40%