110001 - Disclosure - First Trust Dorsey Wright Dynamic Focus 5 ETF Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 110002 - Disclosure - First Trust Dorsey Wright Dynamic Focus 5 ETF Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 110003 - Disclosure - First Trust Dorsey Wright Dynamic Focus 5 ETF Investment Strategy link:presentationLink link:definitionLink link:calculationLink 110004 - Disclosure - First Trust Dorsey Wright Dynamic Focus 5 ETF Investment Risks link:presentationLink link:definitionLink link:calculationLink 110005 - Disclosure - First Trust Dorsey Wright Dynamic Focus 5 ETF Performance Management link:presentationLink link:definitionLink link:calculationLink 120010 - Disclosure - First Trust Dorsey Wright Dynamic Focus 5 ETF Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 120020 - Disclosure - First Trust Dorsey Wright Dynamic Focus 5 ETF Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 120030 - Disclosure - First Trust Dorsey Wright Dynamic Focus 5 ETF Expense Example link:presentationLink link:definitionLink link:calculationLink 120040 - Disclosure - First Trust Dorsey Wright Dynamic Focus 5 ETF Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 120045 - Disclosure - First Trust Dorsey Wright Dynamic Focus 5 ETF Risks Data link:presentationLink link:definitionLink link:calculationLink 120050 - Disclosure - First Trust Dorsey Wright Dynamic Focus 5 ETF Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 120060 - Disclosure - First Trust Dorsey Wright Dynamic Focus 5 ETF Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 120070 - Disclosure - First Trust Dorsey Wright Dynamic Focus 5 ETF Market Index Performance link:presentationLink link:definitionLink link:calculationLink 110000 - Disclosure - First Trust Dorsey Wright Dynamic Focus 5 ETF N-1A Cover link:presentationLink link:definitionLink link:calculationLink 210001 - Disclosure - First Trust Dorsey Wright Focus 5 ETF Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 210002 - Disclosure - First Trust Dorsey Wright Focus 5 ETF Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 210003 - Disclosure - First Trust Dorsey Wright Focus 5 ETF Investment Strategy link:presentationLink link:definitionLink link:calculationLink 210004 - Disclosure - First Trust Dorsey Wright Focus 5 ETF Investment Risks link:presentationLink link:definitionLink link:calculationLink 210005 - Disclosure - First Trust Dorsey Wright Focus 5 ETF Performance Management link:presentationLink link:definitionLink link:calculationLink 220010 - Disclosure - First Trust Dorsey Wright Focus 5 ETF Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 220020 - Disclosure - First Trust Dorsey Wright Focus 5 ETF Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 220030 - Disclosure - First Trust Dorsey Wright Focus 5 ETF Expense Example link:presentationLink link:definitionLink link:calculationLink 220040 - Disclosure - First Trust Dorsey Wright Focus 5 ETF Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 220045 - Disclosure - First Trust Dorsey Wright Focus 5 ETF Risks Data link:presentationLink link:definitionLink link:calculationLink 220050 - Disclosure - First Trust Dorsey Wright Focus 5 ETF Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 220060 - Disclosure - First Trust Dorsey Wright Focus 5 ETF Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 220070 - Disclosure - First Trust Dorsey Wright Focus 5 ETF Market Index Performance link:presentationLink link:definitionLink link:calculationLink 210000 - Disclosure - First Trust Dorsey Wright Focus 5 ETF N-1A Cover link:presentationLink link:definitionLink link:calculationLink 310001 - Disclosure - First Trust Dorsey Wright International Focus 5 ETF Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 310002 - Disclosure - First Trust Dorsey Wright International Focus 5 ETF Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 310003 - Disclosure - First Trust Dorsey Wright International Focus 5 ETF Investment Strategy link:presentationLink link:definitionLink link:calculationLink 310004 - Disclosure - First Trust Dorsey Wright International Focus 5 ETF Investment Risks link:presentationLink link:definitionLink link:calculationLink 310005 - Disclosure - First Trust Dorsey Wright International Focus 5 ETF Performance Management link:presentationLink link:definitionLink link:calculationLink 320010 - Disclosure - First Trust Dorsey Wright International Focus 5 ETF Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 320020 - Disclosure - First Trust Dorsey Wright International Focus 5 ETF Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 320030 - Disclosure - First Trust Dorsey Wright International Focus 5 ETF Expense Example link:presentationLink link:definitionLink link:calculationLink 320040 - Disclosure - First Trust Dorsey Wright International Focus 5 ETF Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 320045 - Disclosure - First Trust Dorsey Wright International Focus 5 ETF Risks Data link:presentationLink link:definitionLink link:calculationLink 320050 - Disclosure - First Trust Dorsey Wright International Focus 5 ETF Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 320060 - Disclosure - First Trust Dorsey Wright International Focus 5 ETF Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 320070 - Disclosure - First Trust Dorsey Wright International Focus 5 ETF Market Index Performance link:presentationLink link:definitionLink link:calculationLink 310000 - Disclosure - First Trust Dorsey Wright International Focus 5 ETF N-1A Cover link:presentationLink link:definitionLink link:calculationLink 410001 - Disclosure - First Trust Dorsey Wright Momentum and Dividend ETF Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 410002 - Disclosure - First Trust Dorsey Wright Momentum and Dividend ETF Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 410003 - Disclosure - First Trust Dorsey Wright Momentum and Dividend ETF Investment Strategy link:presentationLink link:definitionLink link:calculationLink 410004 - Disclosure - First Trust Dorsey Wright Momentum and Dividend ETF Investment Risks link:presentationLink link:definitionLink link:calculationLink 410005 - Disclosure - First Trust Dorsey Wright Momentum and Dividend ETF Performance Management link:presentationLink link:definitionLink link:calculationLink 420010 - Disclosure - First Trust Dorsey Wright Momentum and Dividend ETF Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 420020 - Disclosure - First Trust Dorsey Wright Momentum and Dividend ETF Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 420030 - Disclosure - First Trust Dorsey Wright Momentum and Dividend ETF Expense Example link:presentationLink link:definitionLink link:calculationLink 420040 - Disclosure - First Trust Dorsey Wright Momentum and Dividend ETF Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 420045 - Disclosure - First Trust Dorsey Wright Momentum and Dividend ETF Risks Data link:presentationLink link:definitionLink link:calculationLink 420050 - Disclosure - First Trust Dorsey Wright Momentum and Dividend ETF Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 420060 - Disclosure - First Trust Dorsey Wright Momentum and Dividend ETF Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 420070 - Disclosure - First Trust Dorsey Wright Momentum and Dividend ETF Market Index Performance link:presentationLink link:definitionLink link:calculationLink 410000 - Disclosure - First Trust Dorsey Wright Momentum and Dividend ETF N-1A Cover link:presentationLink link:definitionLink link:calculationLink 510001 - Disclosure - First Trust NASDAQ Technology Dividend Index Fund Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 510002 - Disclosure - First Trust NASDAQ Technology Dividend Index Fund Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 510003 - Disclosure - First Trust NASDAQ Technology Dividend Index Fund Investment Strategy link:presentationLink link:definitionLink link:calculationLink 510004 - Disclosure - First Trust NASDAQ Technology Dividend Index Fund Investment Risks link:presentationLink link:definitionLink link:calculationLink 510005 - Disclosure - First Trust NASDAQ Technology Dividend Index Fund Performance Management link:presentationLink link:definitionLink link:calculationLink 520010 - Disclosure - First Trust NASDAQ Technology Dividend Index Fund Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 520020 - Disclosure - First Trust NASDAQ Technology Dividend Index Fund Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 520030 - Disclosure - First Trust NASDAQ Technology Dividend Index Fund Expense Example link:presentationLink link:definitionLink link:calculationLink 520040 - Disclosure - First Trust NASDAQ Technology Dividend Index Fund Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 520045 - Disclosure - First Trust NASDAQ Technology Dividend Index Fund Risks Data link:presentationLink link:definitionLink link:calculationLink 520050 - Disclosure - First Trust NASDAQ Technology Dividend Index Fund Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 520060 - Disclosure - First Trust NASDAQ Technology Dividend Index Fund Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 520070 - Disclosure - First Trust NASDAQ Technology Dividend Index Fund Market Index Performance link:presentationLink link:definitionLink link:calculationLink 510000 - Disclosure - First Trust NASDAQ Technology Dividend Index Fund N-1A Cover link:presentationLink link:definitionLink link:calculationLink 610001 - Disclosure - First Trust RBA American Industrial Renaissance ETF Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 610002 - Disclosure - First Trust RBA American Industrial Renaissance ETF Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 610003 - Disclosure - First Trust RBA American Industrial Renaissance ETF Investment Strategy link:presentationLink link:definitionLink link:calculationLink 610004 - Disclosure - First Trust RBA American Industrial Renaissance ETF Investment Risks link:presentationLink link:definitionLink link:calculationLink 610005 - Disclosure - First Trust RBA American Industrial Renaissance ETF Performance Management link:presentationLink link:definitionLink link:calculationLink 620010 - Disclosure - First Trust RBA American Industrial Renaissance ETF Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 620020 - Disclosure - First Trust RBA American Industrial Renaissance ETF Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 620030 - Disclosure - First Trust RBA American Industrial Renaissance ETF Expense Example link:presentationLink link:definitionLink link:calculationLink 620040 - Disclosure - First Trust RBA American Industrial Renaissance ETF Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 620045 - Disclosure - First Trust RBA American Industrial Renaissance ETF Risks Data link:presentationLink link:definitionLink link:calculationLink 620050 - Disclosure - First Trust RBA American Industrial Renaissance ETF Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 620060 - Disclosure - First Trust RBA American Industrial Renaissance ETF Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 620070 - Disclosure - First Trust RBA American Industrial Renaissance ETF Market Index Performance link:presentationLink link:definitionLink link:calculationLink 610000 - Disclosure - First Trust RBA American Industrial Renaissance ETF N-1A Cover link:presentationLink link:definitionLink link:calculationLink 710001 - Disclosure - First Trust Rising Dividend Achievers ETF Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 710002 - Disclosure - First Trust Rising Dividend Achievers ETF Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 710003 - Disclosure - First Trust Rising Dividend Achievers ETF Investment Strategy link:presentationLink link:definitionLink link:calculationLink 710004 - Disclosure - First Trust Rising Dividend Achievers ETF Investment Risks link:presentationLink link:definitionLink link:calculationLink 710005 - Disclosure - First Trust Rising Dividend Achievers ETF Performance Management link:presentationLink link:definitionLink link:calculationLink 720010 - Disclosure - First Trust Rising Dividend Achievers ETF Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 720020 - Disclosure - First Trust Rising Dividend Achievers ETF Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 720030 - Disclosure - First Trust Rising Dividend Achievers ETF Expense Example link:presentationLink link:definitionLink link:calculationLink 720040 - Disclosure - First Trust Rising Dividend Achievers ETF Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 720045 - Disclosure - First Trust Rising Dividend Achievers ETF Risks Data link:presentationLink link:definitionLink link:calculationLink 720050 - Disclosure - First Trust Rising Dividend Achievers ETF Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 720060 - Disclosure - First Trust Rising Dividend Achievers ETF Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 720070 - Disclosure - First Trust Rising Dividend Achievers ETF Market Index Performance link:presentationLink link:definitionLink link:calculationLink 710000 - Disclosure - First Trust Rising Dividend Achievers ETF N-1A Cover link:presentationLink link:definitionLink link:calculationLink 810001 - Disclosure - First Trust S and P International Dividend Aristocrats ETF Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 810002 - Disclosure - First Trust S and P International Dividend Aristocrats ETF Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 810003 - Disclosure - First Trust S and P International Dividend Aristocrats ETF Investment Strategy link:presentationLink link:definitionLink link:calculationLink 810004 - Disclosure - First Trust S and P International Dividend Aristocrats ETF Investment Risks link:presentationLink link:definitionLink link:calculationLink 810005 - Disclosure - First Trust S and P International Dividend Aristocrats ETF Performance Management link:presentationLink link:definitionLink link:calculationLink 820010 - Disclosure - First Trust S and P International Dividend Aristocrats ETF Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 820020 - Disclosure - First Trust S and P International Dividend Aristocrats ETF Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 820030 - Disclosure - First Trust S and P International Dividend Aristocrats ETF Expense Example link:presentationLink link:definitionLink link:calculationLink 820040 - Disclosure - First Trust S and P International Dividend Aristocrats ETF Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 820045 - Disclosure - First Trust S and P International Dividend Aristocrats ETF Risks Data link:presentationLink link:definitionLink link:calculationLink 820050 - Disclosure - First Trust S and P International Dividend Aristocrats ETF Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 820060 - Disclosure - First Trust S and P International Dividend Aristocrats ETF Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 820070 - Disclosure - First Trust S and P International Dividend Aristocrats ETF Market Index Performance link:presentationLink link:definitionLink link:calculationLink 810000 - Disclosure - First Trust S and P International Dividend Aristocrats ETF N-1A Cover link:presentationLink link:definitionLink link:calculationLink 910001 - Disclosure - Multi-Asset Diversified Income Index Fund Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 910002 - Disclosure - Multi-Asset Diversified Income Index Fund Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 910003 - Disclosure - Multi-Asset Diversified Income Index Fund Investment Strategy link:presentationLink link:definitionLink link:calculationLink 910004 - Disclosure - Multi-Asset Diversified Income Index Fund Investment Risks link:presentationLink link:definitionLink link:calculationLink 910005 - Disclosure - Multi-Asset Diversified Income Index Fund Performance Management link:presentationLink link:definitionLink link:calculationLink 920010 - Disclosure - Multi-Asset Diversified Income Index Fund Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 920020 - Disclosure - Multi-Asset Diversified Income Index Fund Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 920030 - Disclosure - Multi-Asset Diversified Income Index Fund Expense Example link:presentationLink link:definitionLink link:calculationLink 920040 - Disclosure - Multi-Asset Diversified Income Index Fund Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 920045 - Disclosure - Multi-Asset Diversified Income Index Fund Risks Data link:presentationLink link:definitionLink link:calculationLink 920050 - Disclosure - Multi-Asset Diversified Income Index Fund Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 920060 - Disclosure - Multi-Asset Diversified Income Index Fund Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 920070 - Disclosure - Multi-Asset Diversified Income Index Fund Market Index Performance link:presentationLink link:definitionLink link:calculationLink 910000 - Disclosure - Multi-Asset Diversified Income Index Fund N-1A Cover link:presentationLink link:definitionLink link:calculationLink 1010001 - Disclosure - First Trust Dorsey Wright Momentum and Low Volatility ETF Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 1010002 - Disclosure - First Trust Dorsey Wright Momentum and Low Volatility ETF Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 1010003 - Disclosure - First Trust Dorsey Wright Momentum and Low Volatility ETF Investment Strategy link:presentationLink link:definitionLink link:calculationLink 1010004 - Disclosure - First Trust Dorsey Wright Momentum and Low Volatility ETF Investment Risks link:presentationLink link:definitionLink link:calculationLink 1010005 - Disclosure - First Trust Dorsey Wright Momentum and Low Volatility ETF Performance Management link:presentationLink link:definitionLink link:calculationLink 1020010 - Disclosure - First Trust Dorsey Wright Momentum and Low Volatility ETF Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 1020020 - Disclosure - First Trust Dorsey Wright Momentum and Low Volatility ETF Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 1020030 - Disclosure - First Trust Dorsey Wright Momentum and Low Volatility ETF Expense Example link:presentationLink link:definitionLink link:calculationLink 1020040 - Disclosure - First Trust Dorsey Wright Momentum and Low Volatility ETF Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 1020045 - Disclosure - First Trust Dorsey Wright Momentum and Low Volatility ETF Risks Data link:presentationLink link:definitionLink link:calculationLink 1020050 - Disclosure - First Trust Dorsey Wright Momentum and Low Volatility ETF Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1020060 - Disclosure - First Trust Dorsey Wright Momentum and Low Volatility ETF Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1020070 - Disclosure - First Trust Dorsey Wright Momentum and Low Volatility ETF Market Index Performance link:presentationLink link:definitionLink link:calculationLink 1010000 - Disclosure - First Trust Dorsey Wright Momentum and Low Volatility ETF N-1A Cover link:presentationLink link:definitionLink link:calculationLink 1110001 - Disclosure - First Trust Dorsey Wright Momentum and Value ETF Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 1110002 - Disclosure - First Trust Dorsey Wright Momentum and Value ETF Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 1110003 - Disclosure - First Trust Dorsey Wright Momentum and Value ETF Investment Strategy link:presentationLink link:definitionLink link:calculationLink 1110004 - Disclosure - First Trust Dorsey Wright Momentum and Value ETF Investment Risks link:presentationLink link:definitionLink link:calculationLink 1110005 - Disclosure - First Trust Dorsey Wright Momentum and Value ETF Performance Management link:presentationLink link:definitionLink link:calculationLink 1120010 - Disclosure - First Trust Dorsey Wright Momentum and Value ETF Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 1120020 - Disclosure - First Trust Dorsey Wright Momentum and Value ETF Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 1120030 - Disclosure - First Trust Dorsey Wright Momentum and Value ETF Expense Example link:presentationLink link:definitionLink link:calculationLink 1120040 - Disclosure - First Trust Dorsey Wright Momentum and Value ETF Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 1120045 - Disclosure - First Trust Dorsey Wright Momentum and Value ETF Risks Data link:presentationLink link:definitionLink link:calculationLink 1120050 - Disclosure - First Trust Dorsey Wright Momentum and Value ETF Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1120060 - Disclosure - First Trust Dorsey Wright Momentum and Value ETF Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1120070 - Disclosure - First Trust Dorsey Wright Momentum and Value ETF Market Index Performance link:presentationLink link:definitionLink link:calculationLink 1110000 - Disclosure - First Trust Dorsey Wright Momentum and Value ETF N-1A Cover link:presentationLink link:definitionLink link:calculationLink 1210001 - Disclosure - First Trust SMID Cap Rising Dividend Achievers ETF Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 1210002 - Disclosure - First Trust SMID Cap Rising Dividend Achievers ETF Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 1210003 - Disclosure - First Trust SMID Cap Rising Dividend Achievers ETF Investment Strategy link:presentationLink link:definitionLink link:calculationLink 1210004 - Disclosure - First Trust SMID Cap Rising Dividend Achievers ETF Investment Risks link:presentationLink link:definitionLink link:calculationLink 1210005 - Disclosure - First Trust SMID Cap Rising Dividend Achievers ETF Performance Management link:presentationLink link:definitionLink link:calculationLink 1220010 - Disclosure - First Trust SMID Cap Rising Dividend Achievers ETF Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 1220020 - Disclosure - First Trust SMID Cap Rising Dividend Achievers ETF Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 1220030 - Disclosure - First Trust SMID Cap Rising Dividend Achievers ETF Expense Example link:presentationLink link:definitionLink link:calculationLink 1220040 - Disclosure - First Trust SMID Cap Rising Dividend Achievers ETF Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 1220045 - Disclosure - First Trust SMID Cap Rising Dividend Achievers ETF Risks Data link:presentationLink link:definitionLink link:calculationLink 1220050 - Disclosure - First Trust SMID Cap Rising Dividend Achievers ETF Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1220060 - Disclosure - First Trust SMID Cap Rising Dividend Achievers ETF Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1220070 - Disclosure - First Trust SMID Cap Rising Dividend Achievers ETF Market Index Performance link:presentationLink link:definitionLink link:calculationLink 1210000 - Disclosure - First Trust SMID Cap Rising Dividend Achievers ETF N-1A Cover link:presentationLink link:definitionLink link:calculationLink 1310001 - Disclosure - First Trust Indxx Innovative Transaction and Process ETF Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 1310002 - Disclosure - First Trust Indxx Innovative Transaction and Process ETF Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 1310003 - Disclosure - First Trust Indxx Innovative Transaction and Process ETF Investment Strategy link:presentationLink link:definitionLink link:calculationLink 1310004 - Disclosure - First Trust Indxx Innovative Transaction and Process ETF Investment Risks link:presentationLink link:definitionLink link:calculationLink 1310005 - Disclosure - First Trust Indxx Innovative Transaction and Process ETF Performance Management link:presentationLink link:definitionLink link:calculationLink 1320010 - Disclosure - First Trust Indxx Innovative Transaction and Process ETF Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 1320020 - Disclosure - First Trust Indxx Innovative Transaction and Process ETF Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 1320030 - Disclosure - First Trust Indxx Innovative Transaction and Process ETF Expense Example link:presentationLink link:definitionLink link:calculationLink 1320040 - Disclosure - First Trust Indxx Innovative Transaction and Process ETF Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 1320045 - Disclosure - First Trust Indxx Innovative Transaction and Process ETF Risks Data link:presentationLink link:definitionLink link:calculationLink 1320050 - Disclosure - First Trust Indxx Innovative Transaction and Process ETF Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1320060 - Disclosure - First Trust Indxx Innovative Transaction and Process ETF Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1320070 - Disclosure - First Trust Indxx Innovative Transaction and Process ETF Market Index Performance link:presentationLink link:definitionLink link:calculationLink 1310000 - Disclosure - First Trust Indxx Innovative Transaction and Process ETF N-1A Cover link:presentationLink link:definitionLink link:calculationLink 1410001 - Disclosure - First Trust Nasdaq Artificial Intelligence and Robotics ETF Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 1410002 - Disclosure - First Trust Nasdaq Artificial Intelligence and Robotics ETF Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 1410003 - Disclosure - First Trust Nasdaq Artificial Intelligence and Robotics ETF Investment Strategy link:presentationLink link:definitionLink link:calculationLink 1410004 - Disclosure - First Trust Nasdaq Artificial Intelligence and Robotics ETF Investment Risks link:presentationLink link:definitionLink link:calculationLink 1410005 - Disclosure - First Trust Nasdaq Artificial Intelligence and Robotics ETF Performance Management link:presentationLink link:definitionLink link:calculationLink 1420010 - Disclosure - First Trust Nasdaq Artificial Intelligence and Robotics ETF Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 1420020 - Disclosure - First Trust Nasdaq Artificial Intelligence and Robotics ETF Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 1420030 - Disclosure - First Trust Nasdaq Artificial Intelligence and Robotics ETF Expense Example link:presentationLink link:definitionLink link:calculationLink 1420040 - Disclosure - First Trust Nasdaq Artificial Intelligence and Robotics ETF Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 1420045 - Disclosure - First Trust Nasdaq Artificial Intelligence and Robotics ETF Risks Data link:presentationLink link:definitionLink link:calculationLink 1420050 - Disclosure - First Trust Nasdaq Artificial Intelligence and Robotics ETF Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1420060 - Disclosure - First Trust Nasdaq Artificial Intelligence and Robotics ETF Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1420070 - Disclosure - First Trust Nasdaq Artificial Intelligence and Robotics ETF Market Index Performance link:presentationLink link:definitionLink link:calculationLink 1410000 - Disclosure - First Trust Nasdaq Artificial Intelligence and Robotics ETF N-1A Cover link:presentationLink link:definitionLink link:calculationLink 1510001 - Disclosure - First Trust International Developed Capital Strength ETF Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 1510002 - Disclosure - First Trust International Developed Capital Strength ETF Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 1510003 - Disclosure - First Trust International Developed Capital Strength ETF Investment Strategy link:presentationLink link:definitionLink link:calculationLink 1510004 - Disclosure - First Trust International Developed Capital Strength ETF Investment Risks link:presentationLink link:definitionLink link:calculationLink 1510005 - Disclosure - First Trust International Developed Capital Strength ETF Performance Management link:presentationLink link:definitionLink link:calculationLink 1520010 - Disclosure - First Trust International Developed Capital Strength ETF Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 1520020 - Disclosure - First Trust International Developed Capital Strength ETF Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 1520030 - Disclosure - First Trust International Developed Capital Strength ETF Expense Example link:presentationLink link:definitionLink link:calculationLink 1520040 - Disclosure - First Trust International Developed Capital Strength ETF Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 1520045 - Disclosure - First Trust International Developed Capital Strength ETF Risks Data link:presentationLink link:definitionLink link:calculationLink 1520050 - Disclosure - First Trust International Developed Capital Strength ETF Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1520060 - Disclosure - First Trust International Developed Capital Strength ETF Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1520070 - Disclosure - First Trust International Developed Capital Strength ETF Market Index Performance link:presentationLink link:definitionLink link:calculationLink 1510000 - Disclosure - First Trust International Developed Capital Strength ETF N-1A Cover link:presentationLink link:definitionLink link:calculationLink 1610001 - Disclosure - First Trust S&P 500 Economic Moat ETF Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 1610002 - Disclosure - First Trust S&P 500 Economic Moat ETF Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 1610003 - Disclosure - First Trust S&P 500 Economic Moat ETF Investment Strategy link:presentationLink link:definitionLink link:calculationLink 1610004 - Disclosure - First Trust S&P 500 Economic Moat ETF Investment Risks link:presentationLink link:definitionLink link:calculationLink 1610005 - Disclosure - First Trust S&P 500 Economic Moat ETF Performance Management link:presentationLink link:definitionLink link:calculationLink 1620010 - Disclosure - First Trust S&P 500 Economic Moat ETF Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 1620020 - Disclosure - First Trust S&P 500 Economic Moat ETF Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 1620030 - Disclosure - First Trust S&P 500 Economic Moat ETF Expense Example link:presentationLink link:definitionLink link:calculationLink 1620040 - Disclosure - First Trust S&P 500 Economic Moat ETF Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 1620045 - Disclosure - First Trust S&P 500 Economic Moat ETF Risks Data link:presentationLink link:definitionLink link:calculationLink 1620050 - Disclosure - First Trust S&P 500 Economic Moat ETF Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1620060 - Disclosure - First Trust S&P 500 Economic Moat ETF Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1620070 - Disclosure - First Trust S&P 500 Economic Moat ETF Market Index Performance link:presentationLink link:definitionLink link:calculationLink 1610000 - Disclosure - First Trust S&P 500 Economic Moat ETF N-1A Cover link:presentationLink link:definitionLink link:calculationLink 1710001 - Disclosure - First Trust RBA Deglobalization ETF Investment Objectives and Goals link:presentationLink link:definitionLink link:calculationLink 1710002 - Disclosure - First Trust RBA Deglobalization ETF Fees and Expenses link:presentationLink link:definitionLink link:calculationLink 1710003 - Disclosure - First Trust RBA Deglobalization ETF Investment Strategy link:presentationLink link:definitionLink link:calculationLink 1710004 - Disclosure - First Trust RBA Deglobalization ETF Investment Risks link:presentationLink link:definitionLink link:calculationLink 1710005 - Disclosure - First Trust RBA Deglobalization ETF Performance Management link:presentationLink link:definitionLink link:calculationLink 1720010 - Disclosure - First Trust RBA Deglobalization ETF Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 1720020 - Disclosure - First Trust RBA Deglobalization ETF Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 1720030 - Disclosure - First Trust RBA Deglobalization ETF Expense Example link:presentationLink link:definitionLink link:calculationLink 1720040 - Disclosure - First Trust RBA Deglobalization ETF Expense Example, No Redemption link:presentationLink link:definitionLink link:calculationLink 1720045 - Disclosure - First Trust RBA Deglobalization ETF Risks Data link:presentationLink link:definitionLink link:calculationLink 1720050 - Disclosure - First Trust RBA Deglobalization ETF Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1720060 - Disclosure - First Trust RBA Deglobalization ETF Average Annual Total Returns link:presentationLink link:definitionLink link:calculationLink 1720070 - Disclosure - First Trust RBA Deglobalization ETF Market Index Performance link:presentationLink link:definitionLink link:calculationLink 1710000 - Disclosure - First Trust RBA Deglobalization ETF N-1A Cover link:presentationLink link:definitionLink link:calculationLink First Trust Dorsey Wright Dynamic Focus 5 ETF S000051669 [Member] C000162607 [Member] Dorsey Wright Dynamic Focus Five(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] S&P 500® Index (reflects no deduction for fees, expenses or taxes)[Member] Aerospace And Defense Companies Risk [Member] Asset Backed Securities Risk [Member] Authorized Participant Concentration Risk [Member] Call Risk [Member] CLO Risk [Member] Concentrated Investment Risk [Member] Conflict Of Interest Risk [Member] Credit Risk [Member] Current Market Conditions Risk [Member] Cyber Security Risk [Member] Debt Securities Risk [Member] Depositary Receipts Risk [Member] Equity Securities Risk [Member] ETF Risk [Member] Extension Risk [Member] Financial Companies Risk [Member] Floating Rate Securities Risk [Member] Growth Stocks Investment Risk [Member] Income Risk [Member] Index Concentration Risk [Member] Index Provider Risk [Member] Index Rebalance Risk [Member] Inflation Risk [Member] Interest Rate Risk [Member] Internet Companies Risk [Member] Large Capitalization Companies Risk [Member] Liquidity Risk [Member] Market Maker Risk [Member] Market Risk [Member] Momentum Investing Risk [Member] Mortgage Related Securities Risk [Member] Non Agency Securities Risk [Member] Non Correlation Risk [Member] Non US Securities Risk [Member] Operational Risk [Member] Passive Investment Risk [Member] Portfolio Turnover Risk [Member] Premium Discount Risk [Member] Prepayment Risk [Member] Semiconductor Companies Risk [Member] Smaller Companies Risk [Member] Trading Issues Risk [Member] US Government Securities Risk [Member] Utilities Companies Risk [Member] Valuation Risk [Member] Value Stocks Investment Risk [Member] First Trust Dorsey Wright Focus 5 ETF S000044369 [Member] C000138164 [Member] Dorsey Wright Focus Five(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] First Trust Dorsey Wright International Focus 5 ETF S000046116 [Member] C000144324 [Member] Dorsey Wright International Focus Five(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] MSCI ACWI ex USA Index (reflects no deduction for fees, expenses or taxes)[Member] China Risk [Member] Currency Risk [Member] Emerging Markets Risk [Member] Europe Risk [Member] Germany Risk [Member] United Kingdom Risk [Member] First Trust Dorsey Wright Momentum and Dividend ETF S000044210 [Member] C000137473 [Member] Dorsey Wright Momentum Plus Dividend Yield(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] Dow Jones U.S. Select Dividend(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] Dividends Risk [Member] Index Or Model Constituent Risk [Member] REIT Risk [Member] First Trust NASDAQ Technology Dividend Index Fund S000038244 [Member] C000117913 [Member] Nasdaq Technology Dividend(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] S&P 500® Information Technology Index (reflects no deduction for fees, expenses or taxes)[Member] Information Technology Companies Risk [Member] Risk Nondiversified [Member] First Trust RBA American Industrial Renaissance ETF S000044209 [Member] C000137472 [Member] Richard Bernstein Advisors American Industrial Renaissance® Index (reflects no deduction for fees, expenses or taxes)[Member] S&P 500® Industrials Index (reflects no deduction for fees, expenses or taxes)[Member] Russell 2500(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] Community Bank Risk [Member] Industrials Companies Risk [Member] First Trust Rising Dividend Achievers ETF S000043486 [Member] C000134868 [Member] Nasdaq US Rising Dividend Achievers(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] First Trust S and P International Dividend Aristocrats ETF S000041989 [Member] C000130399 [Member] S&P International Dividend Aristocrats Index (reflects no deduction for fees, expenses or taxes)[Member] Dow Jones EPAC Select Dividend(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] MSCI World ex USA Index (reflects no deduction for fees, expenses or taxes)[Member] Asia Risk [Member] Canada Risk [Member] International Closed Market Trading Risk [Member] Multi-Asset Diversified Income Index Fund S000038245 [Member] C000117914 [Member] Nasdaq US Multi-Asset Diversified Income(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] Credit Rating Agency Risk [Member] High Yield Securities Risk [Member] MLP Risk [Member] MLP Tax Risk [Member] Preferred Securities Risk [Member] First Trust Dorsey Wright Momentum and Low Volatility ETF S000062933 [Member] C000203940 [Member] Dorsey Wright Momentum Plus Low Volatility(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] Low Volatility Risk [Member] Mid Capitalization Companies Risk [Member] First Trust Dorsey Wright Momentum and Value ETF S000062934 [Member] C000203941 [Member] Dorsey Wright Momentum Plus Value(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] First Trust SMID Cap Rising Dividend Achievers ETF S000059604 [Member] C000195212 [Member] Nasdaq US Small Mid Cap Rising Dividend Achievers(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] S&P 1000® Index (reflects no deduction for fees, expenses or taxes)[Member] Russell 3000® Index (reflects no deduction for fees, expenses or taxes)[Member] Market Capitalization Deviation Risk [Member] Small Capitalization Companies Risk [Member] First Trust Indxx Innovative Transaction and Process ETF S000061213 [Member] C000198271 [Member] Indxx Blockchain Index (reflects no deduction for fees, expenses or taxes)[Member] Blockchain Technology Risk [Member] First Trust Nasdaq Artificial Intelligence and Robotics ETF S000061316 [Member] C000198496 [Member] Nasdaq CTA Artificial Intelligence and Robotics(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] Robotics And Artificial Intelligence Companies Risk [Member] First Trust International Developed Capital Strength ETF S000070281 [Member] C000223561 [Member] The International Developed Capital Strength(TM) Index (reflects no deduction for fees, expenses or taxes)[Member] First Trust S&P 500 Economic Moat ETF S000085477 [Member] First Trust S&P 500 Economic Moat ETF C000250760 [Member] S&P 500® Economic Moat Index (reflects no deduction for fees, expenses or taxes)[Member] Consumer Discretionary Companies Risk [Member] First Trust RBA Deglobalization ETF S000093994 [Member] C000262472 [Member] Cybersecurity Companies Risk [Member] Energy Companies Risk [Member] Materials Companies Risk [Member]