| Label | Element | Value |
|---|---|---|
| Innovator Premium Income 15 Buffer ETF™ - July | United States Treasury Bill [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 99.70% |
| Innovator Premium Income 15 Buffer ETF™ - July | United States Treasury Bill [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | 0.40% |
| Innovator Premium Income 15 Buffer ETF™ - July | SPDR S&P 500 ETF Trust, Expiration: 06/30/2026; Exercise Price: $525.18 (Short) [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Net Asset Value | oef_PctOfNav | (0.10%) |