Shareholder Report, Holdings (Details)

Apr. 30, 2026

C000170278 [Member] | Oceania [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.50%

C000170278 [Member] | Others [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.10%

C000170278 [Member] | North America [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.70%

C000170278 [Member] | South America [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

C000170278 [Member] | Asia [Member]

Holdings [Line Items]

Percent of Net Asset Value

46.90%

C000170278 [Member] | Africa [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

C000170278 [Member] | Europe [Member]

Holdings [Line Items]

Percent of Net Asset Value

36.20%

C000170278 [Member] | Other Assets and Liabilities Net [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

C000094039 [Member] | Oceania [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.50%

C000094039 [Member] | Others [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.10%

C000094039 [Member] | North America [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.70%

C000094039 [Member] | South America [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

C000094039 [Member] | Asia [Member]

Holdings [Line Items]

Percent of Net Asset Value

46.90%

C000094039 [Member] | Africa [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

C000094039 [Member] | Europe [Member]

Holdings [Line Items]

Percent of Net Asset Value

36.20%

C000094039 [Member] | Other Assets and Liabilities Net [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

C000008020 [Member] | Oceania [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.50%

C000008020 [Member] | Others [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.10%

C000008020 [Member] | North America [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.70%

C000008020 [Member] | South America [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

C000008020 [Member] | Asia [Member]

Holdings [Line Items]

Percent of Net Asset Value

46.90%

C000008020 [Member] | Africa [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

C000008020 [Member] | Europe [Member]

Holdings [Line Items]

Percent of Net Asset Value

36.20%

C000008020 [Member] | Other Assets and Liabilities Net [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

C000094038 [Member] | Oceania [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.50%

C000094038 [Member] | Others [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.10%

C000094038 [Member] | North America [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.70%

C000094038 [Member] | South America [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

C000094038 [Member] | Asia [Member]

Holdings [Line Items]

Percent of Net Asset Value

46.90%

C000094038 [Member] | Africa [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

C000094038 [Member] | Europe [Member]

Holdings [Line Items]

Percent of Net Asset Value

36.20%

C000094038 [Member] | Other Assets and Liabilities Net [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

C000094037 [Member] | Oceania [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.50%

C000094037 [Member] | Others [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.10%

C000094037 [Member] | North America [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.70%

C000094037 [Member] | South America [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

C000094037 [Member] | Asia [Member]

Holdings [Line Items]

Percent of Net Asset Value

46.90%

C000094037 [Member] | Africa [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

C000094037 [Member] | Europe [Member]

Holdings [Line Items]

Percent of Net Asset Value

36.20%

C000094037 [Member] | Other Assets and Liabilities Net [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

C000094036 [Member] | Oceania [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.50%

C000094036 [Member] | Others [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.10%

C000094036 [Member] | North America [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.70%

C000094036 [Member] | South America [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.40%

C000094036 [Member] | Asia [Member]

Holdings [Line Items]

Percent of Net Asset Value

46.90%

C000094036 [Member] | Africa [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.00%

C000094036 [Member] | Europe [Member]

Holdings [Line Items]

Percent of Net Asset Value

36.20%

C000094036 [Member] | Other Assets and Liabilities Net [Member]

Holdings [Line Items]

Percent of Net Asset Value

1.20%

C000257760 [Member] | Other Assets and Liabilities Net [Member]

Holdings [Line Items]

Percent of Net Asset Value

4.40%

C000257760 [Member] | Taxable Municipal Bonds [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.70%

C000257760 [Member] | US Government Corporations and Agencies Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

31.10%

C000257760 [Member] | Corporate Bond Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

33.80%

C000257760 [Member] | Asset Backed Commercial Mortgage Backed Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.60%

C000257760 [Member] | Floating Rate Loan Interests [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.40%

C000257760 [Member] | Conventional Mortgage Backed Securities Liability for Sale Commitments [Member]

Holdings [Line Items]

Percent of Net Asset Value

(1.20%)

C000257760 [Member] | Sovereign Debt [Member]

Holdings [Line Items]

Percent of Net Asset Value

19.20%

C000008015 [Member] | Vanguard Total International Bond II Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

17.00%

C000008015 [Member] | Vanguard Total Bond Market II Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

40.60%

C000008015 [Member] | Vanguard Total Stock Market Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

24.90%

C000008015 [Member] | Other Assets and Liabilities Net [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.60%

C000008015 [Member] | Vanguard Total International Stock Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

16.90%

C000008016 [Member] | Vanguard Total International Bond II Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

5.50%

C000008016 [Member] | Vanguard Total Bond Market II Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

13.00%

C000008016 [Member] | Vanguard Total Stock Market Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

48.10%

C000008016 [Member] | Other Assets and Liabilities Net [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.60%

C000008016 [Member] | Vanguard Total International Stock Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

32.80%

C000008017 [Member] | Vanguard Total International Bond II Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

23.10%

C000008017 [Member] | Vanguard Total Bond Market II Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

54.70%

C000008017 [Member] | Vanguard Total Stock Market Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

12.70%

C000008017 [Member] | Other Assets and Liabilities Net [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.70%

C000008017 [Member] | Vanguard Total International Stock Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.80%

C000008018 [Member] | Vanguard Total International Bond II Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.00%

C000008018 [Member] | Vanguard Total Bond Market II Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

26.50%

C000008018 [Member] | Vanguard Total Stock Market Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

36.60%

C000008018 [Member] | Other Assets and Liabilities Net [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.70%

C000008018 [Member] | Vanguard Total International Stock Index Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

25.20%

C000008019 [Member] | Other Assets and Liabilities Net [Member]

Holdings [Line Items]

Percent of Net Asset Value

0.00%

C000008019 [Member] | Vanguard STAR Core Plus Bond Fund Institutional Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

36.10%

^[1]

C000008019 [Member] | Vanguard WindsorTM II Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

14.20%

C000008019 [Member] | Vanguard U S Growth Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.60%

C000008019 [Member] | Vanguard Windsor Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

8.50%

C000008019 [Member] | Vanguard PRIMECAP Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.70%

C000008019 [Member] | Vanguard International Value Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.40%

C000008019 [Member] | Vanguard International Growth Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.30%

C000008019 [Member] | Vanguard International Core Stock Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

6.30%

C000008019 [Member] | Vanguard Dividend Growth Fund Investor Shares [Member]

Holdings [Line Items]

Percent of Net Asset Value

3.90%

[1]	STAR Core-Plus Bond Fund is the wholly owned fund in which the Fund has invested a portion of its assets.