| Label | Element | Value |
|---|---|---|
| Innovator U.S. Equity Buffer ETF™ - April | State Street SPDR S&P 500 ETF Trust, Expiration: 03/31/2027; Exercise Price: $6.52 [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 102.90% |
| Innovator U.S. Equity Buffer ETF™ - April | State Street SPDR S&P 500 ETF Trust, Expiration: 03/31/2027; Exercise Price: $650.35 [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3.40% |
| Innovator U.S. Equity Buffer ETF™ - April | State Street SPDR S&P 500 ETF Trust, Expiration: 03/31/2027; Exercise Price: $591.82 (Short) [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | (2.10%) |
| Innovator U.S. Equity Buffer ETF™ - April | State Street SPDR S&P 500 ETF Trust, Expiration: 03/31/2027; Exercise Price: $770.65 (Short) [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | (4.40%) |