Innovator U.S. Small Cap 10 Buffer ETF - Quarterly Innovator U.S. Small Cap 10 Buffer ETF - Quarterly Defined Outcome Strategy Risk [Member] Derivatives Risk [Member] Underlying ETF Risk [Member] Concentration Risk [Member] Cyber Security Risk [Member] Market Risk [Member] Risks Associated with ETFs [Member] Tax Risk [Member] Valuation Risk [Member] Russell 2000 Total Return Index (reflects no deduction for fees, expenses or taxes) Russell 2000 Price Return Index (reflects no deduction for fees, expenses or taxes) Market Risk Member S000085646 Member Valuation Risk Member index_ Russell_2000_ Price_ Return_ Index_reflects_no_deduction_for_fees_expenses_or_taxes Member Defined Outcome Strategy Risk Member Derivatives Risk Member Tax Risk Member Cyber Security Risk Member index_ Russell_2000_ Total_ Return_ Index_reflects_no_deduction_for_fees_expenses_or_taxes Member C000250975 Member Underlying ETFRisk Member Risks Associated With ETFs Member Concentration Risk Member