Vanguard Target Retirement 2020 Fund Investment Objectives and Goals - Investor Prospectus [Member] - Vanguard Target Retirement 2020 Fund	Sep. 30, 2025
Prospectus [Line Items]
Risk/Return [Heading]	<span style="color:#000000;font-family:Arial;font-size:13pt;font-weight:bold;">Vanguard Target Retirement 2020 Fund</span>
Objective [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Investment Objective</span>
Objective, Primary [Text Block]	Vanguard Target Retirement 2020 Fund (the “Fund”) seeks to provide capital appreciation and current income consistent with its current asset allocation.