v3.26.3
PIMCO RAE US Small Fund Average Annual Total Returns
 12 Months Ended 36 Months Ended 60 Months Ended 72 Months Ended 100 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
S&P 500 Index (reflects no deductions for fees, expenses or taxes)[Member]                
Prospectus [Line Items]                
Average Annual Return, Percent 17.88% 17.88% 22.98% 14.42% 15.08% 15.23% 14.88% 14.82%
Russell 2000® Value Index (reflects no deductions for fees, expenses or taxes)[Member]                
Prospectus [Line Items]                
Average Annual Return, Percent 12.60%     8.88%       9.27%
Russell 2000® Index (reflects no deductions for fees, expenses or taxes)[Member]                
Prospectus [Line Items]                
Average Annual Return, Percent 12.81%     6.09%       9.62%
Institutional                
Prospectus [Line Items]                
Average Annual Return, Percent 6.29%     15.83%       12.64%
Institutional | After Taxes on Distributions                
Prospectus [Line Items]                
Average Annual Return, Percent [1] 5.20%     11.90%       9.90%
Institutional | After Taxes on Distributions and Sales                
Prospectus [Line Items]                
Average Annual Return, Percent [1] 4.41%     11.37%       9.38%
I-2                
Prospectus [Line Items]                
Average Annual Return, Percent 6.25%     15.72%       12.53%
A                
Prospectus [Line Items]                
Average Annual Return, Percent 1.91%     14.50%       11.76%
[1] After-tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. In some cases the return after taxes may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period.After-tax returns are for Institutional Class shares only. After-tax returns for other classes will vary.