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Shareholder Report, Average Annual Return (Details)
 12 Months Ended 60 Months Ended 120 Months Ended
Oct. 31, 2025
Oct. 31, 2025
Oct. 31, 2025
C000177522_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 23.38%    
C000177522_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   12.58%  
C000177522_0_BBIndexMember_LOCMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 8.71%    
C000014789_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 23.38%    
C000014789_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   12.58%  
C000014789_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.72%
C000014790_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 23.38%    
C000014790_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   12.58%  
C000014790_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.72%
C000014788_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 23.38%    
C000014788_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   12.58%  
C000014788_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.72%
C000177523_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 25.17%    
C000177523_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   11.37%  
C000177523_0_BBIndexMember_LOCMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 8.49%    
C000014824_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 25.17%    
C000014824_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   11.37%  
C000014824_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.85%
C000014825_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 25.17%    
C000014825_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   11.37%  
C000014825_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.85%
C000014823_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 25.17%    
C000014823_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   11.37%  
C000014823_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.85%
C000014821_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 25.17%    
C000014821_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   11.37%  
C000014821_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.85%
C000014819_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 23.03%    
C000014819_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   14.99%  
C000014819_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     11.72%
C000014820_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 23.03%    
C000014820_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   14.99%  
C000014820_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     11.72%
C000014818_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 23.03%    
C000014818_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   14.99%  
C000014818_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     11.72%
C000014816_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 23.03%    
C000014816_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   14.99%  
C000014816_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     11.72%
C000130140_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 27.88%    
C000130140_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   7.47%  
C000130140_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.71%
C000014804_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 27.88%    
C000014804_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   7.47%  
C000014804_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.71%
C000014805_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 27.88%    
C000014805_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   7.47%  
C000014805_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.71%
C000014803_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 27.88%    
C000014803_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   7.47%  
C000014803_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.71%
C000014801_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 27.88%    
C000014801_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   7.47%  
C000014801_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.71%
C000205050_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 28.35%    
C000205050_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   6.78%  
C000205050_0_BBIndexMember_LOCMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 7.37%    
C000014799_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 28.35%    
C000014799_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   6.78%  
C000014799_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     8.14%
C000014800_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 28.35%    
C000014800_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   6.78%  
C000014800_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     8.14%
C000014798_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 28.35%    
C000014798_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   6.78%  
C000014798_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     8.14%
C000014796_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 28.35%    
C000014796_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   6.78%  
C000014796_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     8.14%
C000130139_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 23.38%    
C000130139_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   12.58%  
C000130139_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.72%
C000014779_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 23.38%    
C000014779_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   12.58%  
C000014779_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.72%
C000014780_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 23.38%    
C000014780_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   12.58%  
C000014780_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.72%
C000014778_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 23.38%    
C000014778_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   12.58%  
C000014778_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.72%
C000014776_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 23.38%    
C000014776_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   12.58%  
C000014776_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.72%
C000014786_0_BBIndexMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 23.38%    
C000014786_0_BBIndexMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   12.58%  
C000014786_0_BBIndexMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.72%
C000177522_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 18.09%    
C000177522_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   10.29%  
C000177522_NoLoadClassMember_2024-11-01_2025-10-31Member      
Average Annual Return [Line Items]      
Average Annual Return, Percent 9.42%    
C000014789_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 13.25%    
C000014789_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   8.82%  
C000014789_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     6.79%
C000014789_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 17.36%    
C000014789_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   9.60%  
C000014789_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.17%
C000014790_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 17.95%    
C000014790_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   10.15%  
C000014790_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.72%
C000014788_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 15.72%    
C000014788_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   8.98%  
C000014788_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     6.71%
C000014788_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 16.72%    
C000014788_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   8.98%  
C000014788_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     6.71%
C000177523_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 17.23%    
C000177523_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   9.23%  
C000177523_NoLoadClassMember_2024-11-01_2025-10-31Member      
Average Annual Return [Line Items]      
Average Annual Return, Percent 11.14%    
C000014824_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 12.43%    
C000014824_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   7.77%  
C000014824_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     8.64%
C000014824_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 16.50%    
C000014824_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   8.54%  
C000014824_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     9.03%
C000014825_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 17.10%    
C000014825_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   9.10%  
C000014825_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     9.59%
C000014823_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 14.92%    
C000014823_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   8.00%  
C000014823_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     8.65%
C000014823_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 15.92%    
C000014823_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   8.00%  
C000014823_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     8.65%
C000014821_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 10.10%    
C000014821_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   7.53%  
C000014821_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     8.66%
C000014821_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 16.81%    
C000014821_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   8.82%  
C000014821_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     9.31%
C000014819_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 16.67%    
C000014819_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   13.33%  
C000014819_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     10.68%
C000014819_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 20.90%    
C000014819_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   14.14%  
C000014819_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     11.08%
C000014820_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 21.48%    
C000014820_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   14.78%  
C000014820_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     11.70%
C000014818_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 19.26%    
C000014818_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   13.56%  
C000014818_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     10.69%
C000014818_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 20.26%    
C000014818_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   13.56%  
C000014818_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     10.69%
C000014816_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 14.19%    
C000014816_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   13.08%  
C000014816_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     10.70%
C000014816_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 21.16%    
C000014816_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   14.43%  
C000014816_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     11.36%
C000130140_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 31.54%    
C000130140_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   9.00%  
C000130140_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     10.13%
C000014804_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 26.14%    
C000014804_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   7.49%  
C000014804_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     8.95%
C000014804_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 30.71%    
C000014804_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   8.26%  
C000014804_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     9.34%
C000014805_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 31.39%    
C000014805_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   8.86%  
C000014805_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     9.98%
C000014803_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 29.09%    
C000014803_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   7.72%  
C000014803_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     8.96%
C000014803_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 30.09%    
C000014803_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   7.72%  
C000014803_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     8.96%
C000014801_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 23.52%    
C000014801_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   7.27%  
C000014801_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     8.99%
C000014801_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 31.06%    
C000014801_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   8.55%  
C000014801_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     9.64%
C000205050_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 35.80%    
C000205050_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   7.13%  
C000205050_NoLoadClassMember_2024-11-01_2025-10-31Member      
Average Annual Return [Line Items]      
Average Annual Return, Percent 13.45%    
C000014799_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 30.20%    
C000014799_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   5.66%  
C000014799_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     11.43%
C000014799_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 34.92%    
C000014799_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   6.42%  
C000014799_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     11.83%
C000014800_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 35.63%    
C000014800_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   6.99%  
C000014800_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     12.46%
C000014798_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 33.27%    
C000014798_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   5.91%  
C000014798_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     11.47%
C000014798_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 34.27%    
C000014798_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   5.91%  
C000014798_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     11.47%
C000014796_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 27.48%    
C000014796_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   5.44%  
C000014796_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     11.48%
C000014796_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 35.25%    
C000014796_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   6.69%  
C000014796_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     12.14%
C000130139_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 21.46%    
C000130139_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   9.42%  
C000130139_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     8.13%
C000014779_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 16.47%    
C000014779_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   7.93%  
C000014779_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.02%
C000014779_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 20.70%    
C000014779_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   8.70%  
C000014779_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.40%
C000014780_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 21.32%    
C000014780_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   9.26%  
C000014780_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.96%
C000014778_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 19.11%    
C000014778_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   8.14%  
C000014778_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.01%
C000014778_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 20.11%    
C000014778_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   8.14%  
C000014778_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.01%
C000014776_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 14.05%    
C000014776_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   7.71%  
C000014776_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.05%
C000014776_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 21.01%    
C000014776_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   8.99%  
C000014776_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.68%
C000014786_ClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 10.86%    
C000014786_ClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   8.53%  
C000014786_ClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     6.76%
C000014786_NoLoadClassMember_1YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent 17.62%    
C000014786_NoLoadClassMember_5YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent   9.83%  
C000014786_NoLoadClassMember_10YRMember      
Average Annual Return [Line Items]      
Average Annual Return, Percent     7.40%