Label	Element	Value
Institutional \| DFA Two-Year Global Fixed Income Portfolio [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	29.60%
Institutional \| DFA Short-Term Extended Quality Portfolio [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	29.60%
Institutional \| U.S. Core Equity 2 Portfolio [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	13.60%
Institutional \| DFA Inflation-Protected Securities Portfolio [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	10.90%
Institutional \| International Core Equity 2 Portfolio [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	4.80%
Institutional \| U.S. Core Equity 1 Portfolio [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	4.60%
Institutional \| DFA World ex U.S. Government Fixed Income Portfolio [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	4.00%
Institutional \| Emerging Markets Core Equity 2 Portfolio [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	2.40%
Institutional \| DFA Real Estate Securities Portfolio [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	0.40%
Institutional \| DFA International Real Estate Securities Portfolio [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	0.10%