| Label | Element | Value |
|---|---|---|
| Innovator U.S. Equity Buffer ETF™ - May | State Street SPDR S&P 500 ETF Trust, Expiration: 04/30/2027; Exercise Price: $7.20 [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 98.90% |
| Innovator U.S. Equity Buffer ETF™ - May | State Street SPDR S&P 500 ETF Trust, Expiration: 04/30/2027; Exercise Price: $718.67 [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 5.90% |
| Innovator U.S. Equity Buffer ETF™ - May | State Street SPDR S&P 500 ETF Trust, Expiration: 04/30/2027; Exercise Price: $840.40 (Short) [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | (1.40%) |
| Innovator U.S. Equity Buffer ETF™ - May | State Street SPDR S&P 500 ETF Trust, Expiration: 04/30/2027; Exercise Price: $653.99 (Short) [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | (3.60%) |