3.26.1 html 167 56 1 true 40 0 false 2 false false R1.htm 010000 - Disclosure - Form N-1A Cover Sheet http://xbrl.sec.gov/rr/role/N1aCover Form N-1A Cover Risk/Return 1 false false R2.htm 010003 - Disclosure - Investment Strategy Sheet http://xbrl.sec.gov/rr/role/InvestmentStrategy Investment Strategy Risk/Return 2 false false R3.htm 110000 - Disclosure - Vanguard Balanced Index Fund N-1A Cover Sheet http://www.vanguard.com/1/role/N1aCover Vanguard Balanced Index Fund N-1A Cover Risk/Return 3 false false R4.htm 110001 - Disclosure - Vanguard Balanced Index Fund Investment Objectives and Goals Sheet http://www.vanguard.com/1/role/RiskReturn Vanguard Balanced Index Fund Investment Objectives and Goals Risk/Return 4 false false R5.htm 110002 - Disclosure - Vanguard Balanced Index Fund Fees and Expenses Sheet http://www.vanguard.com/1/role/FeesAndExpenses Vanguard Balanced Index Fund Fees and Expenses Risk/Return 5 false false R6.htm 110003 - Disclosure - Vanguard Balanced Index Fund Investment Strategy Sheet http://www.vanguard.com/1/role/InvestmentStrategy Vanguard Balanced Index Fund Investment Strategy Risk/Return 6 false false R7.htm 110004 - Disclosure - Vanguard Balanced Index Fund Investment Risks Sheet http://www.vanguard.com/1/role/InvestmentRisks Vanguard Balanced Index Fund Investment Risks Risk/Return 7 false false R8.htm 110005 - Disclosure - Vanguard Balanced Index Fund Performance Management Sheet http://www.vanguard.com/1/role/PerformanceManagement Vanguard Balanced Index Fund Performance Management Risk/Return 8 false false R9.htm 120010 - Disclosure - Vanguard Balanced Index Fund Shareholder Fees Sheet http://www.vanguard.com/1/role/ShareholderFeesData Vanguard Balanced Index Fund Shareholder Fees Risk/Return 9 false false R10.htm 120020 - Disclosure - Vanguard Balanced Index Fund Annual Fund Operating Expenses Sheet http://www.vanguard.com/1/role/OperatingExpensesData Vanguard Balanced Index Fund Annual Fund Operating Expenses Risk/Return 10 false false R11.htm 120030 - Disclosure - Vanguard Balanced Index Fund Expense Example Sheet http://www.vanguard.com/1/role/ExpenseExample Vanguard Balanced Index Fund Expense Example Risk/Return 11 false false R12.htm 120050 - Disclosure - Vanguard Balanced Index Fund Annual Total Returns Sheet http://www.vanguard.com/1/role/BarChartData Vanguard Balanced Index Fund Annual Total Returns Risk/Return 12 false false R13.htm 120060 - Disclosure - Vanguard Balanced Index Fund Average Annual Total Returns Sheet http://www.vanguard.com/1/role/PerformanceTableData Vanguard Balanced Index Fund Average Annual Total Returns Risk/Return 13 false false R14.htm 210000 - Disclosure - Vanguard Balanced Index Fund N-1A Cover Sheet http://www.vanguard.com/2/role/N1aCover Vanguard Balanced Index Fund N-1A Cover Risk/Return 14 false false R15.htm 210001 - Disclosure - Vanguard Balanced Index Fund Investment Objectives and Goals Sheet http://www.vanguard.com/2/role/RiskReturn Vanguard Balanced Index Fund Investment Objectives and Goals Risk/Return 15 false false R16.htm 210002 - Disclosure - Vanguard Balanced Index Fund Fees and Expenses Sheet http://www.vanguard.com/2/role/FeesAndExpenses Vanguard Balanced Index Fund Fees and Expenses Risk/Return 16 false false R17.htm 210003 - Disclosure - Vanguard Balanced Index Fund Investment Strategy Sheet http://www.vanguard.com/2/role/InvestmentStrategy Vanguard Balanced Index Fund Investment Strategy Risk/Return 17 false false R18.htm 210004 - Disclosure - Vanguard Balanced Index Fund Investment Risks Sheet http://www.vanguard.com/2/role/InvestmentRisks Vanguard Balanced Index Fund Investment Risks Risk/Return 18 false false R19.htm 210005 - Disclosure - Vanguard Balanced Index Fund Performance Management Sheet http://www.vanguard.com/2/role/PerformanceManagement Vanguard Balanced Index Fund Performance Management Risk/Return 19 false false R20.htm 220010 - Disclosure - Vanguard Balanced Index Fund Shareholder Fees Sheet http://www.vanguard.com/2/role/ShareholderFeesData Vanguard Balanced Index Fund Shareholder Fees Risk/Return 20 false false R21.htm 220020 - Disclosure - Vanguard Balanced Index Fund Annual Fund Operating Expenses Sheet http://www.vanguard.com/2/role/OperatingExpensesData Vanguard Balanced Index Fund Annual Fund Operating Expenses Risk/Return 21 false false R22.htm 220030 - Disclosure - Vanguard Balanced Index Fund Expense Example Sheet http://www.vanguard.com/2/role/ExpenseExample Vanguard Balanced Index Fund Expense Example Risk/Return 22 false false R23.htm 220050 - Disclosure - Vanguard Balanced Index Fund Annual Total Returns Sheet http://www.vanguard.com/2/role/BarChartData Vanguard Balanced Index Fund Annual Total Returns Risk/Return 23 false false R24.htm 220060 - Disclosure - Vanguard Balanced Index Fund Average Annual Total Returns Sheet http://www.vanguard.com/2/role/PerformanceTableData Vanguard Balanced Index Fund Average Annual Total Returns Risk/Return 24 false false R25.htm 310000 - Disclosure - Vanguard Balanced Index Fund N-1A Cover Sheet http://www.vanguard.com/3/role/N1aCover Vanguard Balanced Index Fund N-1A Cover Risk/Return 25 false false R26.htm 310001 - Disclosure - Vanguard Balanced Index Fund Investment Objectives and Goals Sheet http://www.vanguard.com/3/role/RiskReturn Vanguard Balanced Index Fund Investment Objectives and Goals Risk/Return 26 false false R27.htm 310002 - Disclosure - Vanguard Balanced Index Fund Fees and Expenses Sheet http://www.vanguard.com/3/role/FeesAndExpenses Vanguard Balanced Index Fund Fees and Expenses Risk/Return 27 false false R28.htm 310003 - Disclosure - Vanguard Balanced Index Fund Investment Strategy Sheet http://www.vanguard.com/3/role/InvestmentStrategy Vanguard Balanced Index Fund Investment Strategy Risk/Return 28 false false R29.htm 310004 - Disclosure - Vanguard Balanced Index Fund Investment Risks Sheet http://www.vanguard.com/3/role/InvestmentRisks Vanguard Balanced Index Fund Investment Risks Risk/Return 29 false false R30.htm 310005 - Disclosure - Vanguard Balanced Index Fund Performance Management Sheet http://www.vanguard.com/3/role/PerformanceManagement Vanguard Balanced Index Fund Performance Management Risk/Return 30 false false R31.htm 320010 - Disclosure - Vanguard Balanced Index Fund Shareholder Fees Sheet http://www.vanguard.com/3/role/ShareholderFeesData Vanguard Balanced Index Fund Shareholder Fees Risk/Return 31 false false R32.htm 320020 - Disclosure - Vanguard Balanced Index Fund Annual Fund Operating Expenses Sheet http://www.vanguard.com/3/role/OperatingExpensesData Vanguard Balanced Index Fund Annual Fund Operating Expenses Risk/Return 32 false false R33.htm 320030 - Disclosure - Vanguard Balanced Index Fund Expense Example Sheet http://www.vanguard.com/3/role/ExpenseExample Vanguard Balanced Index Fund Expense Example Risk/Return 33 false false R34.htm 320050 - Disclosure - Vanguard Balanced Index Fund Annual Total Returns Sheet http://www.vanguard.com/3/role/BarChartData Vanguard Balanced Index Fund Annual Total Returns Risk/Return 34 false false R35.htm 320060 - Disclosure - Vanguard Balanced Index Fund Average Annual Total Returns Sheet http://www.vanguard.com/3/role/PerformanceTableData Vanguard Balanced Index Fund Average Annual Total Returns Risk/Return 35 false false R36.htm 410000 - Disclosure - Vanguard Baillie Gifford Global Positive Impact Stock Fund N-1A Cover Sheet http://www.vanguard.com/4/role/N1aCover Vanguard Baillie Gifford Global Positive Impact Stock Fund N-1A Cover Risk/Return 36 false false R37.htm 410001 - Disclosure - Vanguard Baillie Gifford Global Positive Impact Stock Fund Investment Objectives and Goals Sheet http://www.vanguard.com/4/role/RiskReturn Vanguard Baillie Gifford Global Positive Impact Stock Fund Investment Objectives and Goals Risk/Return 37 false false R38.htm 410002 - Disclosure - Vanguard Baillie Gifford Global Positive Impact Stock Fund Fees and Expenses Sheet http://www.vanguard.com/4/role/FeesAndExpenses Vanguard Baillie Gifford Global Positive Impact Stock Fund Fees and Expenses Risk/Return 38 false false R39.htm 410003 - Disclosure - Vanguard Baillie Gifford Global Positive Impact Stock Fund Investment Strategy Sheet http://www.vanguard.com/4/role/InvestmentStrategy Vanguard Baillie Gifford Global Positive Impact Stock Fund Investment Strategy Risk/Return 39 false false R40.htm 410004 - Disclosure - Vanguard Baillie Gifford Global Positive Impact Stock Fund Investment Risks Sheet http://www.vanguard.com/4/role/InvestmentRisks Vanguard Baillie Gifford Global Positive Impact Stock Fund Investment Risks Risk/Return 40 false false R41.htm 410005 - Disclosure - Vanguard Baillie Gifford Global Positive Impact Stock Fund Performance Management Sheet http://www.vanguard.com/4/role/PerformanceManagement Vanguard Baillie Gifford Global Positive Impact Stock Fund Performance Management Risk/Return 41 false false R42.htm 420010 - Disclosure - Vanguard Baillie Gifford Global Positive Impact Stock Fund Shareholder Fees Sheet http://www.vanguard.com/4/role/ShareholderFeesData Vanguard Baillie Gifford Global Positive Impact Stock Fund Shareholder Fees Risk/Return 42 false false R43.htm 420020 - Disclosure - Vanguard Baillie Gifford Global Positive Impact Stock Fund Annual Fund Operating Expenses Sheet http://www.vanguard.com/4/role/OperatingExpensesData Vanguard Baillie Gifford Global Positive Impact Stock Fund Annual Fund Operating Expenses Risk/Return 43 false false R44.htm 420030 - Disclosure - Vanguard Baillie Gifford Global Positive Impact Stock Fund Expense Example Sheet http://www.vanguard.com/4/role/ExpenseExample Vanguard Baillie Gifford Global Positive Impact Stock Fund Expense Example Risk/Return 44 false false R45.htm 420050 - Disclosure - Vanguard Baillie Gifford Global Positive Impact Stock Fund Annual Total Returns Sheet http://www.vanguard.com/4/role/BarChartData Vanguard Baillie Gifford Global Positive Impact Stock Fund Annual Total Returns Risk/Return 45 false false R46.htm 420060 - Disclosure - Vanguard Baillie Gifford Global Positive Impact Stock Fund Average Annual Total Returns Sheet http://www.vanguard.com/4/role/PerformanceTableData Vanguard Baillie Gifford Global Positive Impact Stock Fund Average Annual Total Returns Risk/Return 46 false false All Reports Book All Reports f45034d1.htm valleyforge-20251231.xsd bgp010_9.jpg bi869_19.jpg bip2_24.jpg bip502_10.jpg g0utmt4fo21yx0wes49v5.jpg g0uxa00uhbrio6h9uzwv8.jpg g0uylqsz9s8uhiutv2thn.jpg g15k182qp4a7yl8yypvpa.jpg g19bpt922t3dxev47jv9s.jpg g1j70ldqgzdxllir3hd5m.jpg g1mldtyhoeitejkaxcx9p.jpg g230blfjk3qdniz0hxnuf.jpg g2zcidg1eopqc8vx1ndb9.jpg g3h8e8m0wjimyr6hipk0w.jpg g3lgd76yqfpvdy34du1h5.jpg g3pnimlxgcyr0rdi5gjla.jpg g3zrxim8cpimcitilec8f.jpg g4aucny7h9n3cl3ztkrd9.jpg g4tg9r3xcup7wnecf3jvj.jpg g5ajlpz0an7yvmn58ni3g.jpg g5b1y8qkqrr2bbr861ddc.jpg g610yeolqwprrz1ksgymx.jpg g65idfgodte0ojse4zpue.jpg g6or5o104ojggyuxbs6d4.jpg g6zhd22aamzsz5jje37we.jpg g7efl2kvjyp2jovu1w397.jpg g7mmhdcc07gberlicfhme.jpg g8nuor2nyrpr9nqo4v8mz.jpg g8vm771w24axwfhxskg6m.jpg g94nfqujz5ljpcdk8vffn.jpg g9ol1kxqhicdsuc6jsuy9.jpg gafjrw413be0phwr94hrj.jpg gagezea4k35kbr711jy9z.jpg gajoifrq4mq25sjjfoic1.jpg gazmzs9vcopb5wy1cm1q1.jpg gb2c39i19xxku63bxl4u1.jpg gbks514io35ebm2nrxz17.jpg gbnm2j733q019308g02k8.jpg gc6jn5tdtduo0lv76tjx4.jpg gciuf2p0vd8nkvu2sf58j.jpg gd6lvy2h6ja02e331k6jl.jpg gde3s28tuuwvgitk52w2s.jpg gdil0xp4r9z7ewn0c1caw.jpg gdpbkz4hb6ugh8ycbbzgb.jpg gdt4rfcd5om48eldlhs4f.jpg geawpmgk5duid1ko9hi9v.jpg gee26ar2oe6wena35ynma.jpg gekdzckt9tx00toq3q6m8.jpg gequzyq8a9s2jppxxs8v8.jpg gfnejaftl3hwxwx9m7gz1.jpg gh7ymibcu7zwgjo2r1cph.jpg ghehp6nk2cswldhjq6qm3.jpg ghfuqeepwkduukfjbugh3.jpg gj4cqm4fqvaua5wuk4fkj.jpg gjsahv9e2rfl17uevbl59.jpg gkrker55hp59yl496yiks.jpg gkugxfswfx04jp7esg5fv.jpg gl21sfc6er96ge4tlw0fy.jpg glk9rf098qi2ni04skit4.jpg glxkyy1h69xhdfqbjf0h9.jpg glxphjqquoayw8r3mg3jz.jpg gmfoncuxbz77w426j96ki.jpg gmt47yjcjcif64c95amza.jpg gmxytngkwevpeib4wrjrv.jpg gndbsthal9xmlrrogipbb.jpg gnkbc4vd2xht99kiziob5.jpg gnoh0eiex4bnjm6qv3w39.jpg gntfumv3ginsrx57hwpj9.jpg go9cxvguds60wrrud0itl.jpg god635og4mdyphbabxplu.jpg gp360xwrjtlr3dn7d26l3.jpg gp5211q2gt7in14rbfyr7.jpg gpe86osct7gptpvu01cq2.jpg gqes9e6ygo5rppw6yz50z.jpg gqevzbud19x8aosgp6632.jpg gqgxg6vqlh4stjotw1dlk.jpg gqo7u7h2t44vnuzon5x7p.jpg gqv4ikk6zydtwazawribk.jpg grl40mkvuojgonmmdd2wc.jpg grq7ai8t6n68xf6dyudvj.jpg grwcotvul56f3rufmh5s7.jpg gs8lp5r0ssx6oi09qve10.jpg gsfuxrd474tuwxc012sxo.jpg gsrzid6x57fwn4xwdfw0t.jpg gt7rp4uitycsd9nk1q7xw.jpg gtden688837dly42wc2cf.jpg gtugyn9je7e1f487hunmz.jpg gu0j490z6calhgz0k9lna.jpg gu5xp4kzdc4v3om27zi28.jpg guarnz2ef0ey5x225vkd9.jpg guhnkkxmfdwbwjjlrt7wv.jpg guiusvufkkx0hxndgr6vu.jpg gur68ev6b3tdheecctmbv.jpg gvdxdgjbicuxac102bo72.jpg gvtda7xg2p0aeuydl9e1p.jpg gvu0p3xehqbgtwt94z7i1.jpg gwb0xtuh27np631i6rc84.jpg gwrmk6ic3c854s7br44tf.jpg gxcrxm5tgrnul34c3ot24.jpg gxk57rwbubla67oyfgr74.jpg gxkh9za9qprfqa0k9hkma.jpg gxpngtdjlvplpidgnve7r.jpg gxvx2ly04jk1a1bmmbunt.jpg gy5wfje0slcsh9kuetcvb.jpg gyfh6ehzjnzpbtl2ferc4.jpg gyj947ev7t3aorpln4t7o.jpg gyucwmgcc8t2m1sqtyev9.jpg gywuxavzj8rfrt3cq9cz0.jpg gyyak6i23pqrxwlanvoik.jpg gzgwkbk10y3tnjrq09iq7.jpg gztcnpdyfrvzlawwkig3h.jpg gzvk7ni83n474gyoq3x5t.jpg gzyu24duikcmwmp4kw6vt.jpg vanguard_2.jpg http://xbrl.sec.gov/dei/2024 http://xbrl.sec.gov/oef/2024q3 false false