| Label | Element | Value |
|---|---|---|
| Innovator U.S. Equity Buffer ETF™ - December | SPDR S&P 500 ETF Trust, Expiration: 11/30/2026; Exercise Price: $6.85 [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 99.50% |
| Innovator U.S. Equity Buffer ETF™ - December | SPDR S&P 500 ETF Trust, Expiration: 11/30/2026; Exercise Price: $683.40 [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 3.10% |
| Innovator U.S. Equity Buffer ETF™ - December | SPDR S&P 500 ETF Trust, Expiration: 11/30/2026; Exercise Price: $802.46 (Short) [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | (1.10%) |
| Innovator U.S. Equity Buffer ETF™ - December | SPDR S&P 500 ETF Trust, Expiration: 11/30/2026; Exercise Price: $621.88 (Short) [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | (1.70%) |