Innovator Deepwater Frontier Tech ETF Innovator Deepwater Frontier Tech ETF Concentration Risk [Member] Currency Risk [Member] Cyber Security Risk [Member] Depositary Receipts Risk [Member] Emerging Markets Risk [Member] Equity Securities Risk [Member] Management Risk [Member] Market Risk [Member] Non-U.S. Investment Risk [Member] Portfolio Turnover Risk [Member] Risks Associated with ETFs [Member] Security Issuer Risk [Member] Significant Exposure Risk [Member] Small- and Mid-Capitalization Company Risk [Member] Variable Interest Entity Risk [Member] Volatility Risk [Member] Deepwater Frontier Tech Index(1) (reflects no deduction for fees, expenses or taxes) Dow Jones Global Index (reflects no deduction for fees, expenses or taxes) NASDAQ-100 Total Return Index (reflects no deduction for fees, expenses or taxes) S&P 500 Total Return Index (reflects no deduction for fees, expenses, or taxes) Variable Interest Entity Risk Member Management Risk Member Small And Mid Capitalization Company Risk Member index_ Dow_ Jones_ Global_ Index_reflects_no_deduction_for_fees_expenses_or_taxes Member Significant Exposure Risk Member index_ SP_500_ Total_ Return_ Index_reflects_no_deduction_for_fees_expenses_or_taxes Member Non USInvestment Risk Member Emerging Markets Risk Member Concentration Risk Member index_ Deepwater_ Frontier_ Tech_ Index1_reflects_no_deduction_for_fees_expenses_or_taxes Member C000201551 Member Market Risk Member Security Issuer Risk Member Volatility Risk Member Portfolio Turnover Risk Member Currency Risk Member Equity Securities Risk Member Cyber Security Risk Member Depositary Receipts Risk Member Risks Associated With ETFs Member index_ NASDAQ100_ Total_ Return_ Index_reflects_no_deduction_for_fees_expenses_or_taxes Member S000062244 Member