Label	Element	Value
Innovator S&P Investment Grade Preferred ETF \| Mount Vernon Liquid Assets Portfolio, LLC [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	5.40%
Innovator S&P Investment Grade Preferred ETF \| Apollo Global Management, Inc. [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	4.20%
Innovator S&P Investment Grade Preferred ETF \| KKR & Co., Inc. [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	4.10%
Innovator S&P Investment Grade Preferred ETF \| Ares Management Corp. [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	4.00%
Innovator S&P Investment Grade Preferred ETF \| Voya Financial, Inc. [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	3.90%
Innovator S&P Investment Grade Preferred ETF \| UMB Financial Corp. [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	3.80%
Innovator S&P Investment Grade Preferred ETF \| State Street Corp. [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	3.80%
Innovator S&P Investment Grade Preferred ETF \| Northern Trust Corp. [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	3.80%
Innovator S&P Investment Grade Preferred ETF \| Hartford Insurance Group, Inc. [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	3.80%
Innovator S&P Investment Grade Preferred ETF \| Bank of New York Mellon Corp. [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Net Asset Value	oef_PctOfNav	3.80%