v3.25.4
Average Annual Total Returns
 12 Months Ended 60 Months Ended 109 Months Ended 120 Months Ended 351 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 3000® Index (reflects no deduction for fees, expenses, or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent 17.15% 13.15% 14.52% [1] 14.29%  
MSCI US IMI/Financials 5% Capped Index (reflects no deduction for fees, expenses, or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent 14.84% 15.30% 12.14% [1] 12.93%  
T. Rowe Price Financial Services Fund, Inc. - Investor Class          
Prospectus [Line Items]          
Average Annual Return, Percent 18.74% 17.00%   14.15%  
Performance Inception Date         Sep. 30, 1996
T. Rowe Price Financial Services Fund, Inc. - Investor Class | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Percent 16.85% 15.77%   12.73%  
T. Rowe Price Financial Services Fund, Inc. - Investor Class | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Percent 12.32% 13.58%   11.40%  
T. Rowe Price Financial Services Fund, Inc. - I Class          
Prospectus [Line Items]          
Average Annual Return, Percent 18.90% 17.16% 14.52%    
Performance Inception Date     Nov. 29, 2016    
[1] Return since 11/29/16.