2.2.0.25 true Sheet 010000 - Document - Risk/Return Summary {Unlabeled} Risk/Return Summary http://xbrl.sec.gov/rr/role/RiskReturn true R1.xml false Sheet 040000 - Disclosure - Risk/Return Detail Data {Elements} Risk/Return Detail Data http://xbrl.sec.gov/rr/role/RiskReturnDetailData false R9.xml false Book All Reports All Reports false 1 53 41 0 4 86 true false S000006756_C000018331 17 S000006755_Index1 3 S000006754_C000018321 30 S000006757_C000018335_AfterTaxesOnDistributions 3 S000006757_C000018336 17 S000006758_C000018340_AfterTaxesOnDistributionsAndSales 3 S000006755_C000018327 16 S000006754_C000018321_AfterTaxesOnDistributionsAndSales 3 S000006754_Index8948 3 S000006758_Index8909 3 S000006755 39 S000006756_C000018329 30 S000006757_Index8918 3 S000006755_C000018328 16 S000006756_C000018332 17 S000006758 39 S000006755_C000018324 33 S000006757_Index1004 3 S000006756_C000018334 13 S000006755_C000018325 20 S000006757_C000018339 13 S000006756_C000018329_AfterTaxesOnDistributions 3 S000006756_C000018330 17 S000006754 39 S000006758_Index1 3 S000006756_C000018329_AfterTaxesOnDistributionsAndSales 3 S000006754_Index1 3 S000006756_Index1 3 S000006758_C000018343 13 S000006757_C000018338 13 S000006755_C000018324_AfterTaxesOnDistributions 3 S000006758_C000018342 17 S000006758_C000018341 17 S000006756_Index8920 3 S000006758_C000018344 13 S000006757_C000018337 17 T 10 S000006757 39 S000006756_C000018333 13 S000006757_C000018335_AfterTaxesOnDistributionsAndSales 3 S000006756_Index1030 3 S000006754_Index1040 3 S000006755_C000018326 20 S000006757_C000018335 30 S000006756 39 S000006754_C000018323 17 S000006754_C000066417 13 S000006754_C000018322 17 S000006754_C000068977 13 S000006755_C000018324_AfterTaxesOnDistributionsAndSales 3 S000006758_C000018340_AfterTaxesOnDistributions 3 S000006754_C000018321_AfterTaxesOnDistributions 3 S000006758_C000018340 30 true true