Intech S&P Large Cap Diversified Alpha ETF Equity Market Risk [Member] Market Capitalization Risk [Member] Large-Capitalization Investing [Member] Mid-Capitalization Investing [Member] Index Concentration Risk [Member] ETF Risks [Member] Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member] Costs of Buying or Selling Shares [Member] Shares May Trade at Prices Other Than NAV [Member] Trading [Member] Economic and Market Risk [Member] High Portfolio Turnover Risk [Member] Management Risk [Member] Models and Data Risk [Member] Newer Fund Risk [Member] Newer Sub-Adviser Risk [Member] Operational Risk [Member] Intech S&P Small-Mid Cap Diversified Alpha ETF Small-Capitalization Investing [Member] Intech S&P Large Cap Diversified Alpha ETF [Member] Intech S&P Small-Mid Cap Diversified Alpha ETF [Member] S&P 500® Total Return Index (reflects no deduction for fees, expenses, or taxes) Intech S&P Large Cap Diversified Alpha ETF Intech S&P Large Cap Diversified Alpha ETF Intech S&P Small-Mid Cap Diversified Alpha ETF Intech S&P Small-Mid Cap Diversified Alpha ETF Equity Market Risk. Market Capitalization Risk. Large-Capitalization Investing. Mid-Capitalization Investing. Index Concentration Risk. ETF Risks. Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. Costs of Buying or Selling Shares. Shares May Trade at Prices Other Than NAV. Trading. High Portfolio Turnover Risk. Management Risk. Models and Data Risk. Operational Risk. S&P 500® Total Return Index (reflects no deduction for fees, expenses, or taxes) Small-Capitalization Investing. Economic and Market Risk. Newer Fund Risk. Newer Sub-Adviser Risk.