S000012079 [Member] Average Annual Total Returns	12 Months Ended	15 Months Ended	60 Months Ended	120 Months Ended	158 Months Ended	213 Months Ended	277 Months Ended	334 Months Ended
S000012079 [Member] Average Annual Total Returns	Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2025
Russell 1000® Index (reflects no deductions for fees, expenses or taxes)
Prospectus [Line Items]
Average Annual Return, Percent	17.37%		13.59%	14.59%
Russell 1000® Value Index (reflects no deductions for fees, expenses or taxes)
Prospectus [Line Items]
Average Annual Return, Percent	15.91%		11.33%	10.53%
C000122670 [Member]
Prospectus [Line Items]
Average Annual Return, Percent	15.90%		12.12%	12.41%
Performance Inception Date					Nov. 08, 2012
C000122671 [Member]
Prospectus [Line Items]
Average Annual Return, Percent	15.92%		12.18%	12.46%
Performance Inception Date					Nov. 08, 2012
C000255599 [Member]
Prospectus [Line Items]
Average Annual Return, Percent	15.80%		12.06%	12.32%
Performance Inception Date		Oct. 02, 2024
C000032900 [Member]
Prospectus [Line Items]
Average Annual Return, Percent	8.91%		10.47%	11.38%
Performance Inception Date							Nov. 25, 2002
C000032900 [Member] \| After Taxes on Distributions
Prospectus [Line Items]
Average Annual Return, Percent	7.62%		9.34%	10.30%
Performance Inception Date							Nov. 25, 2002
C000032900 [Member] \| After Taxes on Distributions and Sales
Prospectus [Line Items]
Average Annual Return, Percent	6.17%		8.15%	9.15%
Performance Inception Date							Nov. 25, 2002
C000032902 [Member]
Prospectus [Line Items]
Average Annual Return, Percent	13.66%		10.94%	11.20%
Performance Inception Date							Nov. 25, 2002
C000032905 [Member]
Prospectus [Line Items]
Average Annual Return, Percent	15.85%		12.06%	12.33%
Performance Inception Date								Mar. 04, 1998
C000061836 [Member]
Prospectus [Line Items]
Average Annual Return, Percent	15.24%		11.51%	11.77%
Performance Inception Date						Mar. 28, 2008