v3.25.2
S000006325 [Member] Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
S&P 500 Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent [1] 25.02% 14.53% 13.10%
Russell 1000® Growth Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent [2] 33.36% 18.96% 16.78%
I Class      
Prospectus [Line Items]      
Average Annual Return, Percent 30.92% 16.08% 14.91%
I Class | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Percent 26.75% 12.80% 11.73%
I Class | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Percent 21.38% 12.35% 11.42%
N Class      
Prospectus [Line Items]      
Average Annual Return, Percent 30.80% 15.90% 14.68%
[1]
The Fund has adopted this broad-based index as its primary benchmark index in response to new regulatory requirements.
[2]
The Russell 1000® Growth Index, the Fund’s secondary benchmark index, measures the performance of those companies in the Russell 1000® Index with higher price‑to‑book ratios and higher forecasted growth values.