Innovator Premium Income 15 Buffer ETF - October Innovator Premium Income 15 Buffer ETF - October Defined Outcome Strategy Risk [Member] U.S. Treasury Security Risk [Member] Derivatives Risk [Member] Clearing Member Default Risk [Member] Counterparty Risk [Member] Underlying ETF Risk [Member] Correlation Risk [Member] Investment Objective Risk [Member] Concentration Risk [Member] Cyber Security Risk [Member] Liquidity Risk [Member] Management Risk [Member] Market Risk [Member] Risks Associated with ETFs [Member] Tax Risk [Member] Valuation Risk [Member] S&P 500® Price Return Index (reflects no deduction for fees, expenses or taxes) S&P 500® Total Return Index (reflects no deduction for fees, expenses or taxes) Investment Objective Risk Member Management Risk Member Defined Outcome Strategy Risk Member Tax Risk Member Underlying ETFRisk Member index_ SP_500_ Total_ Return_ Index_reflects_no_deduction_for_fees_expenses_or_taxes Member Concentration Risk Member Clearing Member Default Risk Member Counterparty Risk Member Liquidity Risk Member Market Risk Member S000081985 Member Correlation Risk Member Valuation Risk Member Derivatives Risk Member USTreasury Security Risk Member Cyber Security Risk Member Risks Associated With ETFs Member C000245151 Member index_ SP_500_ Price_ Return_ Index_reflects_no_deduction_for_fees_expenses_or_taxes Member