v3.25.3
Average Annual Total Returns
 12 Months Ended 60 Months Ended 65 Months Ended
Oct. 31, 2024
Dec. 31, 2023
Dec. 31, 2023
Dec. 31, 2023
Innovator Deepwater Frontier Tech ETF        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return Before Taxes      
Average Annual Return, Percent   21.83% 14.78% 12.48%
Performance Inception Date Jul. 24, 2018      
Innovator Deepwater Frontier Tech ETF | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions      
Average Annual Return, Percent   21.83% 14.78% 12.48%
Innovator Deepwater Frontier Tech ETF | 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   12.92% 11.92% 10.15%
Deepwater Frontier Tech Index(1) (reflects no deduction for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Deepwater Frontier Tech Index (reflects no deduction for fees, expenses or taxes)      
Average Annual Return, Percent [1]   22.87% 15.65% 13.23%
Dow Jones Global Index (reflects no deduction for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Dow Jones Global Index (reflects no deduction for fees, expenses or taxes)      
Average Annual Return, Percent   16.87% 9.87% 9.45%
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   25.88% 20.18% 18.63%
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   25.02% 14.53% 13.99%
[1] On or about December 1, 2025, the Fund ceased tracking the Deepwater Frontier Tech Index. Therefore, the Fund’s performance and historical returns shown for periods prior to December 1, 2025, are not indicative of the performance that the Fund, based on its current investment strategies, would have generated.