Shareholder Report, Holdings (Details)	Mar. 31, 2026
C000147001 \| Vanguard FTSE All World ex-US Small-Cap ETF9260173
Holdings [Line Items]
Percent of Total Investments	4.50%
C000147001 \| National Aluminium Co. Ltd.9260333
Holdings [Line Items]
Percent of Total Investments	2.30%
C000147001 \| AGF Management Ltd.9260208
Holdings [Line Items]
Percent of Total Investments	2.00%
C000147001 \| Finning International Inc.9260228
Holdings [Line Items]
Percent of Total Investments	2.00%
C000147001 \| ZIM Integrated Shipping Services Ltd.9260159
Holdings [Line Items]
Percent of Total Investments	1.90%
C000147001 \| Samsung Engineering Co. Ltd.9260480
Holdings [Line Items]
Percent of Total Investments	1.80%
C000147001 \| Supreme Electronics Co. Ltd.9260550
Holdings [Line Items]
Percent of Total Investments	1.80%
C000147001 \| LG Innotek Co. Ltd.9260474
Holdings [Line Items]
Percent of Total Investments	1.80%
C000147001 \| Alamtri Resources Indonesia Tbk PT9260302
Holdings [Line Items]
Percent of Total Investments	1.70%
C000147001 \| OceanaGold Corp.9260240
Holdings [Line Items]
Percent of Total Investments	1.70%
C000147001 \| Country_Short-Term Investment
Holdings [Line Items]
Percent of Net Asset Value	1.50%
C000147001 \| Exchange-Traded Fund
Holdings [Line Items]
Percent of Net Asset Value	4.50%
C000147001 \| Norway
Holdings [Line Items]
Percent of Net Asset Value	2.10%
C000147001 \| Israel
Holdings [Line Items]
Percent of Net Asset Value	2.90%
C000147001 \| Australia
Holdings [Line Items]
Percent of Net Asset Value	3.20%
C000147001 \| China
Holdings [Line Items]
Percent of Net Asset Value	4.60%
C000147001 \| India
Holdings [Line Items]
Percent of Net Asset Value	4.90%
C000147001 \| Indonesia
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000147001 \| United Kingdom
Holdings [Line Items]
Percent of Net Asset Value	7.00%
C000147001 \| South Korea
Holdings [Line Items]
Percent of Net Asset Value	8.20%
C000147001 \| Taiwan
Holdings [Line Items]
Percent of Net Asset Value	8.60%
C000147001 \| Canada
Holdings [Line Items]
Percent of Net Asset Value	11.80%
C000147001 \| Japan
Holdings [Line Items]
Percent of Net Asset Value	20.50%
C000147002 \| Vanguard FTSE All World ex-US Small-Cap ETF9260173
Holdings [Line Items]
Percent of Total Investments	4.50%
C000147002 \| National Aluminium Co. Ltd.9260333
Holdings [Line Items]
Percent of Total Investments	2.30%
C000147002 \| AGF Management Ltd.9260208
Holdings [Line Items]
Percent of Total Investments	2.00%
C000147002 \| Finning International Inc.9260228
Holdings [Line Items]
Percent of Total Investments	2.00%
C000147002 \| ZIM Integrated Shipping Services Ltd.9260159
Holdings [Line Items]
Percent of Total Investments	1.90%
C000147002 \| Samsung Engineering Co. Ltd.9260480
Holdings [Line Items]
Percent of Total Investments	1.80%
C000147002 \| Supreme Electronics Co. Ltd.9260550
Holdings [Line Items]
Percent of Total Investments	1.80%
C000147002 \| LG Innotek Co. Ltd.9260474
Holdings [Line Items]
Percent of Total Investments	1.80%
C000147002 \| Alamtri Resources Indonesia Tbk PT9260302
Holdings [Line Items]
Percent of Total Investments	1.70%
C000147002 \| OceanaGold Corp.9260240
Holdings [Line Items]
Percent of Total Investments	1.70%
C000147002 \| Country_Short-Term Investment
Holdings [Line Items]
Percent of Net Asset Value	1.50%
C000147002 \| Exchange-Traded Fund
Holdings [Line Items]
Percent of Net Asset Value	4.50%
C000147002 \| Norway
Holdings [Line Items]
Percent of Net Asset Value	2.10%
C000147002 \| Israel
Holdings [Line Items]
Percent of Net Asset Value	2.90%
C000147002 \| Australia
Holdings [Line Items]
Percent of Net Asset Value	3.20%
C000147002 \| China
Holdings [Line Items]
Percent of Net Asset Value	4.60%
C000147002 \| India
Holdings [Line Items]
Percent of Net Asset Value	4.90%
C000147002 \| Indonesia
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000147002 \| United Kingdom
Holdings [Line Items]
Percent of Net Asset Value	7.00%
C000147002 \| South Korea
Holdings [Line Items]
Percent of Net Asset Value	8.20%
C000147002 \| Taiwan
Holdings [Line Items]
Percent of Net Asset Value	8.60%
C000147002 \| Canada
Holdings [Line Items]
Percent of Net Asset Value	11.80%
C000147002 \| Japan
Holdings [Line Items]
Percent of Net Asset Value	20.50%