Innovator International Developed Power Buffer ETF - April Innovator International Developed Power Buffer ETF - April 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] MSCI EAFE Total Return Index (reflects no deduction for fees, expenses or taxes) MSCI EAFE Price Return Index (reflects no deduction for fees, expenses or taxes) Market Risk Member S000068279 Member C000218587 Member Valuation Risk Member Defined Outcome Strategy Risk Member Derivatives Risk Member Tax Risk Member Cyber Security Risk Member Underlying ETFRisk Member Risks Associated With ETFs Member index_ MSCI_ EAFE_ Total_ Return_ Index_reflects_no_deduction_for_fees_expenses_or_taxes Member index_ MSCI_ EAFE_ Price_ Return_ Index_reflects_no_deduction_for_fees_expenses_or_taxes Member Concentration Risk Member