v3.26.1
Average Annual Total Returns
 12 Months Ended 60 Months Ended 69 Months Ended
Oct. 31, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Innovator U.S. Equity Power Buffer ETF - April        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return Before Taxes      
Average Annual Return, Percent   6.56% 7.44% 7.38%
Performance Inception Date Mar. 29, 2019      
Innovator U.S. Equity Power Buffer ETF - April | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions      
Average Annual Return, Percent   6.56% 7.44% 7.21%
Innovator U.S. Equity Power Buffer ETF - April | 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   3.88% 5.85% 5.79%
S&P 500® Total Return Index (reflects no deduction for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] S&P 500® Total Return Index (reflects no deduction for fees, expenses or taxes)      
Average Annual Return, Percent   17.88% 14.42% 15.75%
S&P 500® Price Return Index (reflects no deduction for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] S&P 500® Price Return Index (reflects no deduction for fees, expenses or taxes)      
Average Annual Return, Percent   16.39% 12.75% 13.94%