Vanguard FTSE All World ex-US Small-Cap ETF [Member] Vanguard FTSE All World ex-US Small-Cap ETF Investments [Domain] Solactive US Aggregate Bond Index - DDX [Member] Solactive US Aggregate Bond Index - DDX C000265053 [Member] C000265053 U.S. Treasury Securities [Member] U.S. Treasury Securities Solactive US Aggregate Bond Index - DDV [Member] Solactive US Aggregate Bond Index - DDV Vanguard Morningstar Small-Cap ETF [Member] Vanguard Morningstar Small-Cap ETF Vanguard Long-Term Treasury ETF [Member] Vanguard Long-Term Treasury ETF Vanguard Intermediate-Term Treasury ETF [Member] Vanguard Intermediate-Term Treasury ETF Solactive GBS Global Markets All Cap USD Index - DDXX [Member] Solactive GBS Global Markets All Cap USD Index - DDXX Vanguard FTSE Emerging Markets ETF [Member] Vanguard FTSE Emerging Markets ETF Russell 2000 Total Return Index [Member] Russell 2000 Total Return Index Solactive GBS Global Markets All Cap USD Index - DDV [Member] Solactive GBS Global Markets All Cap USD Index - DDV C000265052 [Member] C000265052 Solactive GBS Developed Markets ex North America Large Index [Member] Solactive GBS Developed Markets ex North America Large Index Vanguard S&P 500 ETF [Member] Vanguard S&P 500 ETF Solactive US Aggregate Bond Index - DDXX [Member] Solactive US Aggregate Bond Index - DDXX C000229231 [Member] C000229231 Russell 3000 Total Return Index [Member] Russell 3000 Total Return Index Solactive GBS Emerging Markets Large & Mid Cap Index [Member] Solactive GBS Emerging Markets Large & Mid Cap Index State Street SPDR Portfolio Developed World ex-US ETF [Member] State Street SPDR Portfolio Developed World ex-US ETF Solactive GBS Global Markets All Cap USD Index - DDX [Member] Solactive GBS Global Markets All Cap USD Index - DDX iShares MSCI USA Min Vol Factor ETF [Member] iShares MSCI USA Min Vol Factor ETF Solactive GBS United States 1000 Index [Member] Solactive GBS United States 1000 Index Vanguard Morningstar Value ETF [Member] Vanguard Morningstar Value ETF iShares MSCI International Value Factor ETF [Member] iShares MSCI International Value Factor ETF Custom blended benchmark [Member] Custom blended benchmark Vanguard Morningstar Total Stock Market ETF [Member] Vanguard Morningstar Total Stock Market ETF Net Assets Investment Company, Portfolio Turnover Investment Type [Axis]