FTSE Global Core Infrastructure 50 50 C000216483 Index Net [Member] MSCI World C000216483 Index Net [Member] Morningstar Infrastructure Category Average [Member] FTSE Global Core Infrastructure 50 50 Index Net [Member] MSCI World Index Net [Member] Other [Member] Southern Co The [Member] Ferrovial SE [Member] American Electric Power Co Inc [Member] SSE plc [Member] PPL Corp [Member] WEC Energy Group Inc [Member] Atmos Energy Corp [Member] Enbridge Inc [Member] Canadian National Railway Co [Member] Xcel Energy Inc [Member] C000216485 [Member] Investor Class C000216484 [Member] Class R6 C000216483 [Member] Class I C000216482 [Member] Class C C000216486 [Member] Class A UNITED STATES UNITED KINGDOM SPAIN NEW ZEALAND NETHERLANDS MEXICO JAPAN GERMANY FRANCE CANADA Industrial Property [Member] Hotel [Member] C000216492 [Member] C000216487 [Member] C000216489 [Member] C000216491 [Member] C000216488 [Member] Russell 3000 Index [Member] FTSE Nareit All Equity REITs Index [Member] CBRE Real Estate Tiered Index [Member] MSCI U S REIT Index [Member] Morningstar Real Estate Category Average [Member] Welltower Inc [Member] Equinix Inc [Member] American Tower Corp [Member] Prologis Inc [Member] Simon Property Group Inc [Member] Iron Mountain Inc [Member] CubeSmart [Member] EastGroup Properties Inc [Member] Brixmor Property Group Inc [Member] Equity Residential [Member] Healthcare Facilities [Member] Technology Datacenters [Member] Residential [Member] Technology Towers [Member] Net Lease Properties [Member] Enclosed Malls [Member] Self Storage Property [Member] Community Shopping Centers [Member] Russell 3000 C000216487 Index [Member] FTSE Nareit All Equity REITs C000216487 Index [Member] CBRE Real Estate Tiered C000216487 Index [Member] MSCI U S REIT C000216487 Index [Member] Morningstar Global Moderately Conservative Allocation Category Average [Member] Conservative Allocation Composite Index [Member] MSCI EAFE Index Net [Member] Bloomberg U S Aggregate Bond Index [Member] Other Assets Less Liabilities [Member] Equity Funds Securities [Member] C000221684 [Member] SIMPLE Class C000219985 [Member] Class R3 C000219987 [Member] C000219986 [Member] C000219988 [Member] Standard & Poor's 500 Index [Member] Short-Term Investments [Member] Fixed Income Funds [Member] C000219998 [Member] C000219999 [Member] C000220000 [Member] C000219997 [Member] C000221686 [Member] Equity Allocation Composite Index [Member] Morningstar Global Aggressive Allocation Category Average [Member] Morningstar Global Moderate Allocation Category Average [Member] Moderate Allocation Composite Index [Member] C000221687 [Member] C000220003 [Member] C000220002 [Member] C000220001 [Member] C000220005 [Member] C000220007 [Member] C000220008 [Member] C000220010 [Member] C000220011 [Member] C000221688 [Member] Growth Allocation Composite Index [Member] Morningstar Global Moderately Aggressive Allocation Category Average [Member] Investment Type [Axis] Net Assets Investment Company Portfolio Turnover No Trading Symbol Flag