Shareholder Report, Holdings (Details)	Apr. 30, 2026
C000016574 \| Petroleo Brasileiro SA - Petrobras
Holdings [Line Items]
Percent of Net Asset Value	10.00%
C000016574 \| Vale SA
Holdings [Line Items]
Percent of Net Asset Value	5.80%
C000016574 \| Grupo Mexico SAB de CV
Holdings [Line Items]
Percent of Net Asset Value	5.20%
C000016574 \| Banco Bradesco SA
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000016574 \| Axia Energia SA
Holdings [Line Items]
Percent of Net Asset Value	4.40%
C000016574 \| NU Holdings Ltd.
Holdings [Line Items]
Percent of Net Asset Value	3.60%
C000016574 \| Grupo Financiero Banorte SAB de CV
Holdings [Line Items]
Percent of Net Asset Value	3.40%
C000016574 \| Cia de Saneamento Basico do Estado de Sao Paulo SABESP
Holdings [Line Items]
Percent of Net Asset Value	3.20%
C000016574 \| Equatorial SA
Holdings [Line Items]
Percent of Net Asset Value	3.20%
C000016574 \| Cemex SAB de CV
Holdings [Line Items]
Percent of Net Asset Value	3.00%
C000016574 \| SectorFinancials
Holdings [Line Items]
Percent of Net Asset Value	23.00%
C000016574 \| SectorMaterials
Holdings [Line Items]
Percent of Net Asset Value	18.00%
C000016574 \| SectorUtilities
Holdings [Line Items]
Percent of Net Asset Value	13.00%
C000016574 \| SectorEnergy
Holdings [Line Items]
Percent of Net Asset Value	12.00%
C000016574 \| SectorIndustrials
Holdings [Line Items]
Percent of Net Asset Value	7.00%
C000016574 \| SectorReal Estate
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000016574 \| SectorConsumer Discretionary
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000016574 \| SectorConsumer Staples
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000016574 \| SectorHealth Care
Holdings [Line Items]
Percent of Net Asset Value	2.00%
C000016574 \| SectorCommunication Services
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000016574 \| SectorInformation Technology
Holdings [Line Items]
Percent of Net Asset Value	0.00%
C000016574 \| Brazil
Holdings [Line Items]
Percent of Net Asset Value	62.00%
C000016574 \| Mexico
Holdings [Line Items]
Percent of Net Asset Value	23.00%
C000016574 \| Peru
Holdings [Line Items]
Percent of Net Asset Value	4.00%
C000016574 \| Chile
Holdings [Line Items]
Percent of Net Asset Value	2.00%
C000016574 \| Uruguay
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000016574 \| Argentina
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000016574 \| Colombia
Holdings [Line Items]
Percent of Net Asset Value	0.00%
C000016574 \| United States
Holdings [Line Items]
Percent of Net Asset Value	0.00%
C000016574 \| AssetEquity Securities
Holdings [Line Items]
Percent of Net Asset Value	92.00%
C000016574 \| AssetExchange-Traded Funds
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000016574 \| Asset Other Net Line
Holdings [Line Items]
Percent of Net Asset Value	7.00%
C000016577 \| Petroleo Brasileiro SA - Petrobras
Holdings [Line Items]
Percent of Net Asset Value	10.00%
C000016577 \| Vale SA
Holdings [Line Items]
Percent of Net Asset Value	5.80%
C000016577 \| Grupo Mexico SAB de CV
Holdings [Line Items]
Percent of Net Asset Value	5.20%
C000016577 \| Banco Bradesco SA
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000016577 \| Axia Energia SA
Holdings [Line Items]
Percent of Net Asset Value	4.40%
C000016577 \| NU Holdings Ltd.
Holdings [Line Items]
Percent of Net Asset Value	3.60%
C000016577 \| Grupo Financiero Banorte SAB de CV
Holdings [Line Items]
Percent of Net Asset Value	3.40%
C000016577 \| Cia de Saneamento Basico do Estado de Sao Paulo SABESP
Holdings [Line Items]
Percent of Net Asset Value	3.20%
C000016577 \| Equatorial SA
Holdings [Line Items]
Percent of Net Asset Value	3.20%
C000016577 \| Cemex SAB de CV
Holdings [Line Items]
Percent of Net Asset Value	3.00%
C000016577 \| SectorFinancials
Holdings [Line Items]
Percent of Net Asset Value	23.00%
C000016577 \| SectorMaterials
Holdings [Line Items]
Percent of Net Asset Value	18.00%
C000016577 \| SectorUtilities
Holdings [Line Items]
Percent of Net Asset Value	13.00%
C000016577 \| SectorEnergy
Holdings [Line Items]
Percent of Net Asset Value	12.00%
C000016577 \| SectorIndustrials
Holdings [Line Items]
Percent of Net Asset Value	7.00%
C000016577 \| SectorReal Estate
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000016577 \| SectorConsumer Discretionary
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000016577 \| SectorConsumer Staples
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000016577 \| SectorHealth Care
Holdings [Line Items]
Percent of Net Asset Value	2.00%
C000016577 \| SectorCommunication Services
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000016577 \| SectorInformation Technology
Holdings [Line Items]
Percent of Net Asset Value	0.00%
C000016577 \| Brazil
Holdings [Line Items]
Percent of Net Asset Value	62.00%
C000016577 \| Mexico
Holdings [Line Items]
Percent of Net Asset Value	23.00%
C000016577 \| Peru
Holdings [Line Items]
Percent of Net Asset Value	4.00%
C000016577 \| Chile
Holdings [Line Items]
Percent of Net Asset Value	2.00%
C000016577 \| Uruguay
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000016577 \| Argentina
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000016577 \| Colombia
Holdings [Line Items]
Percent of Net Asset Value	0.00%
C000016577 \| United States
Holdings [Line Items]
Percent of Net Asset Value	0.00%
C000016577 \| AssetEquity Securities
Holdings [Line Items]
Percent of Net Asset Value	92.00%
C000016577 \| AssetExchange-Traded Funds
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000016577 \| Asset Other Net Line
Holdings [Line Items]
Percent of Net Asset Value	7.00%
C000016579 \| Petroleo Brasileiro SA - Petrobras
Holdings [Line Items]
Percent of Net Asset Value	10.00%
C000016579 \| Vale SA
Holdings [Line Items]
Percent of Net Asset Value	5.80%
C000016579 \| Grupo Mexico SAB de CV
Holdings [Line Items]
Percent of Net Asset Value	5.20%
C000016579 \| Banco Bradesco SA
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000016579 \| Axia Energia SA
Holdings [Line Items]
Percent of Net Asset Value	4.40%
C000016579 \| NU Holdings Ltd.
Holdings [Line Items]
Percent of Net Asset Value	3.60%
C000016579 \| Grupo Financiero Banorte SAB de CV
Holdings [Line Items]
Percent of Net Asset Value	3.40%
C000016579 \| Cia de Saneamento Basico do Estado de Sao Paulo SABESP
Holdings [Line Items]
Percent of Net Asset Value	3.20%
C000016579 \| Equatorial SA
Holdings [Line Items]
Percent of Net Asset Value	3.20%
C000016579 \| Cemex SAB de CV
Holdings [Line Items]
Percent of Net Asset Value	3.00%
C000016579 \| SectorFinancials
Holdings [Line Items]
Percent of Net Asset Value	23.00%
C000016579 \| SectorMaterials
Holdings [Line Items]
Percent of Net Asset Value	18.00%
C000016579 \| SectorUtilities
Holdings [Line Items]
Percent of Net Asset Value	13.00%
C000016579 \| SectorEnergy
Holdings [Line Items]
Percent of Net Asset Value	12.00%
C000016579 \| SectorIndustrials
Holdings [Line Items]
Percent of Net Asset Value	7.00%
C000016579 \| SectorReal Estate
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000016579 \| SectorConsumer Discretionary
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000016579 \| SectorConsumer Staples
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000016579 \| SectorHealth Care
Holdings [Line Items]
Percent of Net Asset Value	2.00%
C000016579 \| SectorCommunication Services
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000016579 \| SectorInformation Technology
Holdings [Line Items]
Percent of Net Asset Value	0.00%
C000016579 \| Brazil
Holdings [Line Items]
Percent of Net Asset Value	62.00%
C000016579 \| Mexico
Holdings [Line Items]
Percent of Net Asset Value	23.00%
C000016579 \| Peru
Holdings [Line Items]
Percent of Net Asset Value	4.00%
C000016579 \| Chile
Holdings [Line Items]
Percent of Net Asset Value	2.00%
C000016579 \| Uruguay
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000016579 \| Argentina
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000016579 \| Colombia
Holdings [Line Items]
Percent of Net Asset Value	0.00%
C000016579 \| United States
Holdings [Line Items]
Percent of Net Asset Value	0.00%
C000016579 \| AssetEquity Securities
Holdings [Line Items]
Percent of Net Asset Value	92.00%
C000016579 \| AssetExchange-Traded Funds
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000016579 \| Asset Other Net Line
Holdings [Line Items]
Percent of Net Asset Value	7.00%
C000152125 \| Petroleo Brasileiro SA - Petrobras
Holdings [Line Items]
Percent of Net Asset Value	10.00%
C000152125 \| Vale SA
Holdings [Line Items]
Percent of Net Asset Value	5.80%
C000152125 \| Grupo Mexico SAB de CV
Holdings [Line Items]
Percent of Net Asset Value	5.20%
C000152125 \| Banco Bradesco SA
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000152125 \| Axia Energia SA
Holdings [Line Items]
Percent of Net Asset Value	4.40%
C000152125 \| NU Holdings Ltd.
Holdings [Line Items]
Percent of Net Asset Value	3.60%
C000152125 \| Grupo Financiero Banorte SAB de CV
Holdings [Line Items]
Percent of Net Asset Value	3.40%
C000152125 \| Cia de Saneamento Basico do Estado de Sao Paulo SABESP
Holdings [Line Items]
Percent of Net Asset Value	3.20%
C000152125 \| Equatorial SA
Holdings [Line Items]
Percent of Net Asset Value	3.20%
C000152125 \| Cemex SAB de CV
Holdings [Line Items]
Percent of Net Asset Value	3.00%
C000152125 \| SectorFinancials
Holdings [Line Items]
Percent of Net Asset Value	23.00%
C000152125 \| SectorMaterials
Holdings [Line Items]
Percent of Net Asset Value	18.00%
C000152125 \| SectorUtilities
Holdings [Line Items]
Percent of Net Asset Value	13.00%
C000152125 \| SectorEnergy
Holdings [Line Items]
Percent of Net Asset Value	12.00%
C000152125 \| SectorIndustrials
Holdings [Line Items]
Percent of Net Asset Value	7.00%
C000152125 \| SectorReal Estate
Holdings [Line Items]
Percent of Net Asset Value	6.00%
C000152125 \| SectorConsumer Discretionary
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000152125 \| SectorConsumer Staples
Holdings [Line Items]
Percent of Net Asset Value	5.00%
C000152125 \| SectorHealth Care
Holdings [Line Items]
Percent of Net Asset Value	2.00%
C000152125 \| SectorCommunication Services
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000152125 \| SectorInformation Technology
Holdings [Line Items]
Percent of Net Asset Value	0.00%
C000152125 \| Brazil
Holdings [Line Items]
Percent of Net Asset Value	62.00%
C000152125 \| Mexico
Holdings [Line Items]
Percent of Net Asset Value	23.00%
C000152125 \| Peru
Holdings [Line Items]
Percent of Net Asset Value	4.00%
C000152125 \| Chile
Holdings [Line Items]
Percent of Net Asset Value	2.00%
C000152125 \| Uruguay
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000152125 \| Argentina
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000152125 \| Colombia
Holdings [Line Items]
Percent of Net Asset Value	0.00%
C000152125 \| United States
Holdings [Line Items]
Percent of Net Asset Value	0.00%
C000152125 \| AssetEquity Securities
Holdings [Line Items]
Percent of Net Asset Value	92.00%
C000152125 \| AssetExchange-Traded Funds
Holdings [Line Items]
Percent of Net Asset Value	1.00%
C000152125 \| Asset Other Net Line
Holdings [Line Items]
Percent of Net Asset Value	7.00%

Shareholder Report, Holdings (Details)

Apr. 30, 2026