v3.25.2
Average Annual Total Returns
 12 Months Ended 29 Months Ended 38 Months Ended
Jul. 28, 2025
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Schwab Ariel Opportunities ETF        
Prospectus [Line Items]        
Average Annual Return, Percent   16.03%   3.00%
Performance Inception Date Nov. 16, 2021      
Schwab Ariel Opportunities ETF | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent   15.89%   2.86%
Schwab Ariel Opportunities ETF | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent   9.57%   2.28%
Schwab Crypto Thematic ETF        
Prospectus [Line Items]        
Average Annual Return, Percent   41.92% 28.57%  
Performance Inception Date Aug. 04, 2022      
Schwab Crypto Thematic ETF | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent   41.63% 28.15%  
Schwab Crypto Thematic ETF | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent   24.89% 22.39%  
S&P 500® Index        
Prospectus [Line Items]        
Average Annual Return, Percent   25.02%   9.24%
Russell 2500™ Index        
Prospectus [Line Items]        
Average Annual Return, Percent   12.00%   0.85%
MSCI ACWI Index (Net)        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   17.49% 13.93%  
Schwab Crypto Thematic Index® (Net)        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   42.24% 28.59%  
[1] The net version of the index reflects reinvested dividends net of withholding taxes, but reflects no deductions for expenses or other taxes.