v3.26.3
Shareholder Report, Holdings (Details)
Aug. 31, 2026
C000117929 [Member] | Unibail Rodamco Westfield REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000117929 [Member] | Extra Space Storage Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000117929 [Member] | BXP Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000117929 [Member] | Rexford Industrial Realty Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000117929 [Member] | Ventas Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000117929 [Member] | Digital Realty Trust Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000117929 [Member] | Goodman Group REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000117929 [Member] | Simon Property Group Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000117929 [Member] | Equinix Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.30%
C000117929 [Member] | Prologis Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00%
C000117929 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 67.60%
C000117929 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000117929 [Member] | SINGAPORE  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000117929 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Total Investments 7.70%
C000117929 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000117929 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000117929 [Member] | CANADA  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000117929 [Member] | BELGIUM  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000117929 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000117929 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.50%
C000117929 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 96.00%
C000117929 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074276 [Member] | Unibail Rodamco Westfield REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074276 [Member] | Extra Space Storage Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074276 [Member] | BXP Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074276 [Member] | Rexford Industrial Realty Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074276 [Member] | Ventas Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074276 [Member] | Digital Realty Trust Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074276 [Member] | Goodman Group REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074276 [Member] | Simon Property Group Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000074276 [Member] | Equinix Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.30%
C000074276 [Member] | Prologis Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00%
C000074276 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 67.60%
C000074276 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000074276 [Member] | SINGAPORE  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000074276 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Total Investments 7.70%
C000074276 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000074276 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000074276 [Member] | CANADA  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000074276 [Member] | BELGIUM  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000074276 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000074276 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.50%
C000074276 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 96.00%
C000074276 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074275 [Member] | Unibail Rodamco Westfield REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074275 [Member] | Extra Space Storage Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074275 [Member] | BXP Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074275 [Member] | Rexford Industrial Realty Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074275 [Member] | Ventas Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074275 [Member] | Digital Realty Trust Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074275 [Member] | Goodman Group REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074275 [Member] | Simon Property Group Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000074275 [Member] | Equinix Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.30%
C000074275 [Member] | Prologis Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00%
C000074275 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 67.60%
C000074275 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000074275 [Member] | SINGAPORE  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000074275 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Total Investments 7.70%
C000074275 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000074275 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000074275 [Member] | CANADA  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000074275 [Member] | BELGIUM  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000074275 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000074275 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.50%
C000074275 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 96.00%
C000074275 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074274 [Member] | Unibail Rodamco Westfield REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074274 [Member] | Extra Space Storage Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074274 [Member] | BXP Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074274 [Member] | Rexford Industrial Realty Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074274 [Member] | Ventas Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074274 [Member] | Digital Realty Trust Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074274 [Member] | Goodman Group REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074274 [Member] | Simon Property Group Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000074274 [Member] | Equinix Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.30%
C000074274 [Member] | Prologis Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00%
C000074274 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 67.60%
C000074274 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000074274 [Member] | SINGAPORE  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000074274 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Total Investments 7.70%
C000074274 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000074274 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000074274 [Member] | CANADA  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000074274 [Member] | BELGIUM  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000074274 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000074274 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.50%
C000074274 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 96.00%
C000074274 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074273 [Member] | Unibail Rodamco Westfield REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074273 [Member] | Extra Space Storage Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074273 [Member] | BXP Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074273 [Member] | Rexford Industrial Realty Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074273 [Member] | Ventas Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074273 [Member] | Digital Realty Trust Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074273 [Member] | Goodman Group REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074273 [Member] | Simon Property Group Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000074273 [Member] | Equinix Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.30%
C000074273 [Member] | Prologis Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00%
C000074273 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 67.60%
C000074273 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000074273 [Member] | SINGAPORE  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000074273 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Total Investments 7.70%
C000074273 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000074273 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000074273 [Member] | CANADA  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000074273 [Member] | BELGIUM  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000074273 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000074273 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.50%
C000074273 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 96.00%
C000074273 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074272 [Member] | Unibail Rodamco Westfield REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074272 [Member] | Extra Space Storage Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074272 [Member] | BXP Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074272 [Member] | Rexford Industrial Realty Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074272 [Member] | Ventas Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074272 [Member] | Digital Realty Trust Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074272 [Member] | Goodman Group REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074272 [Member] | Simon Property Group Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000074272 [Member] | Equinix Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.30%
C000074272 [Member] | Prologis Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00%
C000074272 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 67.60%
C000074272 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000074272 [Member] | SINGAPORE  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000074272 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Total Investments 7.70%
C000074272 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000074272 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000074272 [Member] | CANADA  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000074272 [Member] | BELGIUM  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000074272 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000074272 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.50%
C000074272 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 96.00%
C000074272 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074271 [Member] | Unibail Rodamco Westfield REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074271 [Member] | Extra Space Storage Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074271 [Member] | BXP Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074271 [Member] | Rexford Industrial Realty Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074271 [Member] | Ventas Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074271 [Member] | Digital Realty Trust Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074271 [Member] | Goodman Group REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074271 [Member] | Simon Property Group Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000074271 [Member] | Equinix Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.30%
C000074271 [Member] | Prologis Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00%
C000074271 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 67.60%
C000074271 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000074271 [Member] | SINGAPORE  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000074271 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Total Investments 7.70%
C000074271 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000074271 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000074271 [Member] | CANADA  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000074271 [Member] | BELGIUM  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000074271 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000074271 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.50%
C000074271 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 96.00%
C000074271 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074270 [Member] | Unibail Rodamco Westfield REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074270 [Member] | Extra Space Storage Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074270 [Member] | BXP Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074270 [Member] | Rexford Industrial Realty Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074270 [Member] | Ventas Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074270 [Member] | Digital Realty Trust Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074270 [Member] | Goodman Group REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074270 [Member] | Simon Property Group Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000074270 [Member] | Equinix Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.30%
C000074270 [Member] | Prologis Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00%
C000074270 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 67.60%
C000074270 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000074270 [Member] | SINGAPORE  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000074270 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Total Investments 7.70%
C000074270 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000074270 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000074270 [Member] | CANADA  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000074270 [Member] | BELGIUM  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000074270 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000074270 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.50%
C000074270 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 96.00%
C000074270 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074269 [Member] | Unibail Rodamco Westfield REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074269 [Member] | Extra Space Storage Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
C000074269 [Member] | BXP Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074269 [Member] | Rexford Industrial Realty Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
C000074269 [Member] | Ventas Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074269 [Member] | Digital Realty Trust Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30%
C000074269 [Member] | Goodman Group REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
C000074269 [Member] | Simon Property Group Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000074269 [Member] | Equinix Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.30%
C000074269 [Member] | Prologis Inc REIT [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00%
C000074269 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 67.60%
C000074269 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 6.80%
C000074269 [Member] | SINGAPORE  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000074269 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Total Investments 7.70%
C000074269 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Total Investments 2.40%
C000074269 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 3.40%
C000074269 [Member] | CANADA  
Holdings [Line Items]  
Percent of Total Investments 0.20%
C000074269 [Member] | BELGIUM  
Holdings [Line Items]  
Percent of Total Investments 1.80%
C000074269 [Member] | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 8.10%
C000074269 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.50%
C000074269 [Member] | Equity [Member]  
Holdings [Line Items]  
Percent of Total Investments 96.00%
C000074269 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%