v3.25.4
Average Annual Total Returns
 1 Months Ended 2 Months Ended 4 Months Ended 5 Months Ended 7 Months Ended 8 Months Ended 10 Months Ended 11 Months Ended 12 Months Ended 13 Months Ended 14 Months Ended 16 Months Ended 39 Months Ended 45 Months Ended 54 Months Ended 57 Months Ended 60 Months Ended 63 Months Ended 66 Months Ended
Oct. 31, 2025
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Dec. 31, 2024
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Dec. 31, 2024
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Dec. 31, 2024
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Innovator Emerging Markets Power Buffer ETF - January                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   14.41%               3.90% 2.38%    
Performance Inception Date Dec. 31, 2019                                        
Innovator Emerging Markets Power Buffer ETF - January | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent                   14.41%               3.90% 2.38%    
Innovator Emerging Markets Power Buffer ETF - January | 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                   8.53%               3.04% 1.83%    
Innovator Emerging Markets Power Buffer ETF - April                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   14.94%         3.74%            
Performance Inception Date Mar. 31, 2021                                        
Innovator Emerging Markets 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                   14.94%         3.74%            
Innovator Emerging Markets 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                   8.84%         2.90%            
Innovator Emerging Markets Power Buffer ETF - July                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   20.33%                 2.35%   2.54%
Performance Inception Date Jun. 28, 2019                                        
Innovator Emerging Markets 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                   20.33%                 2.35%   2.50%
Innovator Emerging Markets 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                   12.04%                 1.81%   1.95%
Innovator Emerging Markets Power Buffer ETF - October                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   21.97%       5.67%              
Performance Inception Date Sep. 30, 2021                                        
Innovator Emerging Markets Power Buffer ETF - October | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent                   21.97%       5.67%              
Innovator Emerging Markets Power Buffer 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                   13.01%       4.41%              
Innovator Growth-100 Power Buffer ETF - January                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   14.25%               7.81% 7.62%    
Performance Inception Date Dec. 31, 2019                                        
Innovator Growth-100 Power Buffer ETF - January | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent                   14.25%               7.81% 7.62%    
Innovator Growth-100 Power Buffer ETF - January | 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                   8.44%               6.20% 6.00%    
Innovator Growth-100 Power Buffer ETF - April                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   6.62%             9.87%   8.59%    
Performance Inception Date Mar. 31, 2020                                        
Innovator Growth-100 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                   6.62%             9.87%   8.59%    
Innovator Growth-100 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                   3.92%             7.89%   6.79%    
Innovator Growth-100 Power Buffer ETF - June                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent           15.57%       15.54%                      
Performance Inception Date May 31, 2024                                        
Innovator Growth-100 Power Buffer ETF - June | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent           15.57%       15.54%                      
Innovator Growth-100 Power Buffer ETF - June | 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           11.98%       9.20%                      
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%    
Innovator Growth-100 Power Buffer ETF - August                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent         14.78%         14.80%                      
Performance Inception Date Jul. 31, 2024                                        
Innovator Growth-100 Power Buffer ETF - August | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent         14.78%         14.80%                      
Innovator Growth-100 Power Buffer ETF - August | 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         11.34%         8.76%                      
Innovator Growth-100 Power Buffer ETF - September                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent       13.99%           13.88%                      
Performance Inception Date Aug. 30, 2024                                        
Innovator Growth-100 Power Buffer ETF - September | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent       13.99%           13.88%                      
Innovator Growth-100 Power Buffer ETF - September | 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       10.72%           8.22%                      
Innovator Growth-100 Power Buffer ETF - October                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   12.68%                 9.87% 10.69%  
Performance Inception Date Sep. 30, 2019                                        
Innovator Growth-100 Power Buffer ETF - October | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent                   12.68%                 9.87% 10.63%  
Innovator Growth-100 Power Buffer 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                   7.51%                 7.83% 8.57%  
Innovator Growth-100 Power Buffer ETF - November                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent     12.71%             11.09%                      
Performance Inception Date Oct. 31, 2024                                        
Innovator Growth-100 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     12.71%             11.09%                      
Innovator Growth-100 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     9.70%             6.56%                      
Innovator Growth-100 Power Buffer ETF - December                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent   12.93%               13.60%                      
Performance Inception Date Nov. 29, 2024                                        
Innovator Growth-100 Power Buffer ETF - December | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent   12.93%               13.60%                      
Innovator Growth-100 Power Buffer ETF - December | 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   9.87%               8.05%                      
Innovator International Developed Power Buffer ETF - January                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   19.40%               6.71% 7.11%    
Performance Inception Date Dec. 31, 2019                                        
Innovator International Developed Power Buffer ETF - January | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent                   19.40%               6.71% 7.11%    
Innovator International Developed Power Buffer ETF - January | 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                   11.48%               5.30% 5.59%    
Innovator International Developed Power Buffer ETF - February                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                 10.46% 19.96%                      
Performance Inception Date Jan. 31, 2024                                        
Innovator International Developed Power Buffer ETF - February | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent                 10.46% 19.96%                      
Innovator International Developed Power Buffer ETF - February | 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                 8.05% 11.82%                      
Innovator International Developed Power Buffer ETF - March                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent               9.86%   18.87%                      
Performance Inception Date Feb. 29, 2024                                        
Innovator International Developed Power Buffer ETF - March | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent               9.86%   18.87%                      
Innovator International Developed Power Buffer ETF - March | 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               7.95%   11.17%                      
Innovator International Developed Power Buffer ETF - April                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   15.39%         4.60%            
Performance Inception Date Mar. 31, 2021                                        
Innovator International Developed 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                   15.39%         4.60%            
Innovator International Developed 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                   9.11%         3.58%            
Innovator International Developed Power Buffer ETF - May                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent             11.75%     20.38%                      
Performance Inception Date Apr. 30, 2024                                        
Innovator International Developed Power Buffer ETF - May | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent             11.75%     20.38%                      
Innovator International Developed Power Buffer ETF - May | 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             9.03%     12.06%                      
Innovator International Developed Power Buffer ETF - June                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent           9.93%       18.69%                      
Performance Inception Date May 31, 2024                                        
Innovator International Developed Power Buffer ETF - June | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent           9.93%       18.69%                      
Innovator International Developed Power Buffer ETF - June | 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           7.61%       11.06%                      
Innovator International Developed Power Buffer ETF - July                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   21.18%                 6.87%   6.08%
Performance Inception Date Jun. 28, 2019                                        
Innovator International Developed 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                   21.18%                 6.87%   6.03%
Innovator International Developed 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                   12.54%                 5.40%   4.78%
Innovator International Developed Power Buffer ETF - August                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent         9.99%         17.58%                      
Performance Inception Date Jul. 31, 2024                                        
Innovator International Developed Power Buffer ETF - August | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent         9.99%         17.58%                      
Innovator International Developed Power Buffer ETF - August | 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         7.65%         10.41%                      
Innovator International Developed Power Buffer ETF - September                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   18.25%     12.10%                
Performance Inception Date Aug. 31, 2023                                        
Innovator International Developed Power Buffer ETF - September | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent                   18.25%     12.10%                
Innovator International Developed Power Buffer ETF - September | 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                   10.80%     9.38%                
Innovator International Developed Power Buffer ETF - October                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   18.79%       8.16%              
Performance Inception Date Sep. 30, 2021                                        
Innovator International Developed Power Buffer ETF - October | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent                   18.79%       8.16%              
Innovator International Developed Power Buffer 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                   11.12%       6.40%              
Innovator International Developed Power Buffer ETF - November                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   20.24%   15.96%                  
Performance Inception Date Oct. 31, 2023                                        
Innovator International Developed 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                   20.24%   15.96%                  
Innovator International Developed 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                   11.98%   12.40%                  
Innovator International Developed Power Buffer ETF - December                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   21.90% 13.03%                    
Performance Inception Date Nov. 30, 2023                                        
Innovator International Developed Power Buffer ETF - December | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent                   21.90% 13.03%                    
Innovator International Developed Power Buffer ETF - December | 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                   12.97% 10.08%                    
Innovator U.S. Small Cap Power Buffer ETF - January                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   10.61%               7.58% 7.42%    
Performance Inception Date Dec. 31, 2019                                        
Innovator U.S. Small Cap Power Buffer ETF - January | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent                   10.61%               7.58% 7.42%    
Innovator U.S. Small Cap Power Buffer ETF - January | 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                   6.28%               6.01% 5.83%    
Innovator U.S. Small Cap Power Buffer ETF - April                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   7.68%             7.67%   5.66%    
Performance Inception Date Mar. 31, 2020                                        
Innovator U.S. Small Cap 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                   7.68%             7.67%   5.66%    
Innovator U.S. Small Cap 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                   4.55%             6.07%   4.42%    
Innovator U.S. Small Cap Power Buffer ETF - June                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent           6.65%       4.23%                      
Performance Inception Date May 31, 2024                                        
Innovator U.S. Small Cap Power Buffer ETF - June | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent           6.65%       4.23%                      
Innovator U.S. Small Cap Power Buffer ETF - June | 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           5.09%       2.51%                      
Innovator U.S. Small Cap Power Buffer ETF - July                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   8.24%           6.02%     4.17%    
Performance Inception Date Jun. 30, 2020                                        
Innovator U.S. Small Cap 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                   8.24%           6.02%     4.17%    
Innovator U.S. Small Cap 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                   4.88%           4.72%     3.24%    
Innovator U.S. Small Cap Power Buffer ETF - August                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent         5.04%         6.08%                      
Performance Inception Date Jul. 31, 2024                                        
Innovator U.S. Small Cap Power Buffer ETF - August | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent         5.04%         6.08%                      
Innovator U.S. Small Cap Power Buffer ETF - August | 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         3.85%         3.60%                      
Innovator U.S. Small Cap Power Buffer ETF - September                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent       7.89%           9.10%                      
Performance Inception Date Aug. 30, 2024                                        
Innovator U.S. Small Cap Power Buffer ETF - September | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent       7.89%           9.10%                      
Innovator U.S. Small Cap Power Buffer ETF - September | 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       6.03%           5.39%                      
Innovator U.S. Small Cap Power Buffer ETF - October                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent                   10.43%                 5.41% 5.49%  
Performance Inception Date Sep. 30, 2019                                        
Innovator U.S. Small Cap Power Buffer ETF - October | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent                   10.43%                 5.41% 5.44%  
Innovator U.S. Small Cap Power Buffer 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                   6.17%                 4.22% 4.29%  
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%                      
Innovator U.S. Small Cap Power Buffer ETF - December                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return Before Taxes                                        
Average Annual Return, Percent   2.54%               7.17%                      
Performance Inception Date Nov. 29, 2024                                        
Innovator U.S. Small Cap Power Buffer ETF - December | After Taxes on Distributions                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions                                        
Average Annual Return, Percent   2.54%               7.17%                      
Innovator U.S. Small Cap Power Buffer ETF - December | 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   1.94%               4.25%                      
MSCI Emerging Markets Total Return Index (reflects no deduction for fees, expenses or taxes)                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] MSCI Emerging Markets Total Return Index (reflects no deduction for fees, expenses or taxes)                                        
Average Annual Return, Percent                   33.57%       5.26% 3.92%     6.42% 4.20%   7.03%
MSCI Emerging Markets Price Return Index (reflects no deduction for fees, expenses or taxes)                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] MSCI Emerging Markets Price Return Index (reflects no deduction for fees, expenses or taxes)                                        
Average Annual Return, Percent                   30.58%       2.72% 1.37%     3.93% 1.69%   4.49%
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   19.68% 23.59% 21.86% 21.47% 22.41%       21.02%           18.92% 23.59% 20.32% 15.30% 21.78%  
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   18.83% 22.68% 20.98% 20.57% 21.51%       20.17%           17.99% 22.61% 19.36% 14.40% 20.80%  
MSCI EAFE Total Return Index (reflects no deduction for fees, expenses or taxes)                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] MSCI EAFE Total Return Index (reflects no deduction for fees, expenses or taxes)                                        
Average Annual Return, Percent         17.45% 16.40% 18.16% 16.79% 17.15% 31.22% 18.90% 23.06% 17.36% 8.51% 8.62%     8.74% 8.92%   9.16%
MSCI EAFE Price Return Index (reflects no deduction for fees, expenses or taxes)                                          
Prospectus [Line Items]                                          
Average Annual Return, Label [Optional Text] MSCI EAFE Price Return Index (reflects no deduction for fees, expenses or taxes)                                        
Average Annual Return, Percent         14.69% 13.82% 15.29% 13.66% 14.05% 27.89% 15.95% 20.02% 14.49% 5.74% 5.84%     6.02% 6.14%   6.48%
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   3.20% 12.59% 10.28% 8.50% 13.67%       12.81%           11.86% 15.78% 8.29% 6.09% 9.59%  
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   1.78% 11.03% 8.79% 7.01% 12.12%       11.29%           10.38% 14.25% 6.84% 4.68% 8.12%