v3.26.3
Shareholder Report, Average Annual Return (Details)
 12 Months Ended 60 Months Ended
Aug. 31, 2026
Aug. 31, 2026
C000234213_2_BBIndexMember_1YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 2.23%  
C000234213_2_BBIndexMember_LOCMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 1.24%  
C000227886_2_BBIndexMember_1YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 2.23%  
C000227886_2_BBIndexMember_5YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent   0.10%
C000227886_2_BBIndexMember_LOCMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 0.33%  
C000201027_1_BBIndexMember_1YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 2.23%  
C000201027_1_BBIndexMember_5YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent   0.10%
C000201027_1_BBIndexMember_LOCMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 2.25%  
C000234213_NoLoadClassMember_1YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 6.45%  
C000234213_NoLoadClassMember_2025-09-01_2026-08-31Member    
Average Annual Return [Line Items]    
Average Annual Return, Percent 5.78%  
C000234213_0_AdditionalIndexMember_1YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 4.80%  
C000234213_0_AdditionalIndexMember_LOCMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 5.37%  
C000234213_1_AdditionalIndexMember_1YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 4.99%  
C000234213_1_AdditionalIndexMember_LOCMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 5.28%  
C000227886_NoLoadClassMember_1YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 2.52%  
C000227886_NoLoadClassMember_5YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent   1.41%
C000227886_NoLoadClassMember_2025-09-01_2026-08-31Member    
Average Annual Return [Line Items]    
Average Annual Return, Percent 1.63%  
C000227886_0_AdditionalIndexMember_1YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 3.01%  
C000227886_0_AdditionalIndexMember_5YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent   1.96%
C000227886_0_AdditionalIndexMember_LOCMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 2.10%  
C000227886_1_AdditionalIndexMember_1YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 3.00%  
C000227886_1_AdditionalIndexMember_5YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent   1.86%
C000227886_1_AdditionalIndexMember_LOCMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 2.01%  
C000201027_NoLoadClassMember_1YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 6.41%  
C000201027_NoLoadClassMember_5YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent   3.84%
C000201027_NoLoadClassMember_2025-09-01_2026-08-31Member    
Average Annual Return [Line Items]    
Average Annual Return, Percent 5.88%  
C000201027_0_AdditionalIndexMember_1YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 5.32%  
C000201027_0_AdditionalIndexMember_5YRMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent   3.90%
C000201027_0_AdditionalIndexMember_LOCMember    
Average Annual Return [Line Items]    
Average Annual Return, Percent 5.13%