Net Other Assets and Liabilities [Member] U S Government Bonds And Notes [Member] Foreign Corporate Bonds and Notes [Member] Corporate Bonds and Notes [Member] C000111397 [Member] Class I Healthcare Sector [Member] Financial Services Sector [Member] Common Stock [Member] Money Market Funds [Member] Exchange Traded Funds [Member] Energy Sector [Member] Real Estate Sector [Member] C000138651 [Member] First Trust Senior Loan Fund [Member] First Trust Preferred Securities and Income ETF [Member] First Trust Tactical High Yield ETF [Member] iShares iBoxx Investment Grade Corporate Bond ETF [Member] First Trust Intermediate Government Opportunities ETF [Member] iShares 7 10 Year Treasury Bond ETF [Member] First Trust Limited Duration Investment Grade Corporate ETF [Member] Morgan Stanley Institutional Liquidity Funds Treasury Portfolio Institutional Class 3 51 [Member] iShares MBS ETF [Member] Enterprise Products Partners L P [Member] Money Market Funds Sector [Member] First Trust NASDAQ100 Technology Sector Index Fund [Member] iShares Core U S Aggregate Bond ETF [Member] First Trust Nasdaq Transportation ETF [Member] First Trust Developed Markets ex US AlphaDEX Fund [Member] First Trust Emerging Markets AlphaDEX Fund [Member] First Trust NYSE Arca Biotechnology Index Fund [Member] First Trust Mid Cap Growth AlphaDEX Fund [Member] First Trust Large Cap Core AlphaDEX Fund [Member] First Trust Large Cap Growth AlphaDEX Fund [Member] First Trust Nasdaq Semiconductor ETF [Member] C000160832 [Member] C000218786 [Member] Cisco Systems Inc [Member] Monster Beverage Corp [Member] T Rowe Price Group Inc [Member] Automatic Data Processing Inc [Member] Cincinnati Financial Corp [Member] Agilent Technologies Inc [Member] Johnson And Johnson [Member] Union Pacific Corp [Member] Visa Inc Class A [Member] Givaudan S A [Member] ABB Ltd [Member] DBS Group Holdings Ltd [Member] Compass Group PLC [Member] Toronto Dominion Bank The [Member] Royal Bank of Canada [Member] Aristocrat Leisure Ltd [Member] Poste Italiane S p A [Member] Great West Lifeco Inc [Member] C000218789 [Member] C000241974 [Member] Palo Alto Networks Inc [Member] Fortinet Inc [Member] Eli Lilly And Co [Member] Neurocrine Biosciences Inc [Member] Cadence Design Systems Inc [Member] Amphenol Corp Class A [Member] Incyte Corp [Member] Cummins Inc [Member] Put Options Written [Member] Call Options Written [Member] Put Options Purchased [Member] C000241976 [Member] Investment Type [Axis] Net Assets Investment Company Portfolio Turnover No Trading Symbol Flag