v3.26.3
Average Annual Total Returns
 12 Months Ended 39 Months Ended
Oct. 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Innovator Growth Accelerated Plus ETF - October      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Return Before Taxes    
Average Annual Return, Percent   16.77% 8.36%
Performance Inception Date Sep. 30, 2021    
Innovator Growth Accelerated Plus ETF - October | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions    
Average Annual Return, Percent   16.77% 8.36%
Innovator Growth Accelerated Plus ETF - October | 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   9.93% 6.56%
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% 14.50%
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% 13.59%