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Annual Total Returns (Vanguard International Growth Fund - Investor Shares Participant) (Vanguard International Growth Fund, Vanguard International Growth Fund - Investor Shares)
12 Months Ended
Aug. 31, 2014
Vanguard International Growth Fund | Vanguard International Growth Fund - Investor Shares
 
Annual Total Return  
2013 22.95%rr_AnnualReturn2013
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2012 20.01%rr_AnnualReturn2012
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= vanguard_S000004453Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012228Member
2011 (13.68%)rr_AnnualReturn2011
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= vanguard_S000004453Member
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= vanguard_C000012228Member
2010 15.66%rr_AnnualReturn2010
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= vanguard_S000004453Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012228Member
2009 41.63%rr_AnnualReturn2009
/ dei_LegalEntityAxis
= vanguard_S000004453Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012228Member
2008 (44.94%)rr_AnnualReturn2008
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= vanguard_S000004453Member
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= vanguard_C000012228Member
2007 15.98%rr_AnnualReturn2007
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= vanguard_S000004453Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012228Member
2006 25.92%rr_AnnualReturn2006
/ dei_LegalEntityAxis
= vanguard_S000004453Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012228Member
2005 15.00%rr_AnnualReturn2005
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= vanguard_S000004453Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012228Member
2004 18.95%rr_AnnualReturn2004
/ dei_LegalEntityAxis
= vanguard_S000004453Member
/ rr_ProspectusShareClassAxis
= vanguard_C000012228Member