v3.26.1
Shareholder Report, Average Annual Return (Details)
 6 Months Ended 12 Months Ended 17 Months Ended 23 Months Ended 45 Months Ended 60 Months Ended 81 Months Ended 120 Months Ended
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Jun. 30, 2026
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Jun. 30, 2026
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Schwab U.S. TIPS ETF                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Schwab U.S. TIPS ETF              
Average Annual Return, Percent [1],[2] 1.26% 3.38%       0.98%   2.53%
Schwab Short-Term U.S. Treasury ETF                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Schwab Short-Term U.S. Treasury ETF              
Average Annual Return, Percent [1],[2] 0.63% 2.88%       1.87%   1.70%
Schwab Intermediate-Term U.S. Treasury ETF                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Schwab Intermediate-Term U.S. Treasury ETF              
Average Annual Return, Percent [1],[2] 0.01% 2.43%       0.14%   1.14%
Schwab Long-Term U.S. Treasury ETF                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Schwab Long-Term U.S. Treasury ETF              
Average Annual Return, Percent [1],[2] 0.83% 2.87%       (5.62%) (3.79%)  
Schwab U.S. Aggregate Bond ETF                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Schwab U.S. Aggregate Bond ETF              
Average Annual Return, Percent [1],[2] 0.73% 3.75%       0.04%   1.48%
Schwab 1-5 Year Corporate Bond ETF                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Schwab 1-5 Year Corporate Bond ETF              
Average Annual Return, Percent [1],[2] 0.93% 3.84%       2.40% 2.64%  
Schwab 5-10 Year Corporate Bond ETF                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Schwab 5-10 Year Corporate Bond ETF              
Average Annual Return, Percent [1],[2] 0.64% 4.55%       1.17% 2.18%  
Schwab Municipal Bond ETF                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Schwab Municipal Bond ETF              
Average Annual Return, Percent [1],[2] 1.94% 6.49%     4.20%      
Schwab Core Bond ETF                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Schwab Core Bond ETF              
Average Annual Return, Percent [1],[2] 0.91% 4.44% 5.73%          
Schwab Ultra-Short Income ETF                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Schwab Ultra-Short Income ETF              
Average Annual Return, Percent [1],[2] 1.69% 3.99%   4.43%        
Bloomberg US Aggregate Bond Index                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name [7],[8],[9],[10],[11],[12],[13] Bloomberg US Aggregate Bond Index              
Average Annual Return, Percent 0.62% 3.79% 5.04% 3.44%   0.08% 0.87% 1.54%
Bloomberg Municipal Bond Index [Member]                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name [14] Bloomberg Municipal Bond Index              
Average Annual Return, Percent 2.32% 7.03%     4.63%      
Bloomberg US Treasury Inflation-Linked Bond Index (Series-L)SM                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Bloomberg US Treasury Inflation-Linked Bond Index (Series-L)SM              
Average Annual Return, Percent 1.15% 3.42%       1.01%   2.58%
Bloomberg US Treasury 1-3 Year Index [Member]                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Bloomberg US Treasury 1-3 Year Index              
Average Annual Return, Percent 0.64% 2.92%       1.90%   1.75%
Bloomberg US Treasury 3-10 Year Index [Member]                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Bloomberg US Treasury 3-10 Year Index              
Average Annual Return, Percent (0.10%) 2.45%       0.17%   1.18%
Bloomberg US Long Treasury Index [Member]                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Bloomberg US Long Treasury Index              
Average Annual Return, Percent 0.44% 2.89%       (5.60%) (3.77%)  
Bloomberg US 1-5 Year Corporate Bond Index [Member]                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Bloomberg US 1-5 Year Corporate Bond Index              
Average Annual Return, Percent 0.93% 3.85%       2.43% 2.70%  
Bloomberg US 5-10 Year Corporate Bond Index [Member]                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name Bloomberg US 5-10 Year Corporate Bond Index              
Average Annual Return, Percent 0.52% 4.56%       1.20% 2.24%  
ICE AMT-Free Core U.S. National Municipal Index [Member]                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name ICE AMT-Free Core U.S. National Municipal Index              
Average Annual Return, Percent 2.12% 6.76%     4.28%      
ICE BofA US 3-Month Treasury Bill Index [Member]                
Average Annual Return [Line Items]                
Line Graph and Table Measure Name ICE BofA US 3-Month Treasury Bill Index              
Average Annual Return, Percent 1.74% 3.84%   4.19%        
[1] Performance does not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares.
[2] Performance is shown on a NAV basis. The fund’s per share NAV is the value of one share of the fund. NAV is calculated by taking the fund’s total assets (including the fair value of securities owned), subtracting liabilities, and dividing by the number of shares outstanding. Returns assume that dividends and capital gain distributions have been reinvested in the fund at NAV.
[3] Inception (10/10/2019) represents the date that the shares began trading in the secondary market.
[4] Inception (10/12/2022) represents the date that the shares began trading in the secondary market.
[5] Inception (02/05/2025) represents the date that the shares began trading in the secondary market.
[6] Inception (08/13/2024) represents the date that the shares began trading in the secondary market.
[7] The Bloomberg US Aggregate Bond Index serves as the fund’s regulatory index and provides a broad measure of market performance. The ICE BofA US 3-Month Treasury Bill Index is the fund’s additional index and is more representative of the fund’s investment universe than the regulatory index.
[8] The Bloomberg US Aggregate Bond Index serves as the fund’s regulatory index and provides a broad measure of market performance. The fund generally invests in securities that are included in the Bloomberg US 1-5 Year Corporate Bond Index. The fund does not seek to track the regulatory index.
[9] The Bloomberg US Aggregate Bond Index serves as the fund’s regulatory index and provides a broad measure of market performance. The fund generally invests in securities that are included in the Bloomberg US 5-10 Year Corporate Bond Index. The fund does not seek to track the regulatory index.
[10] The Bloomberg US Aggregate Bond Index serves as the fund’s regulatory index and provides a broad measure of market performance. The fund generally invests in securities that are included in the Bloomberg US Long Treasury Index. The fund does not seek to track the regulatory index.
[11] The Bloomberg US Aggregate Bond Index serves as the fund’s regulatory index and provides a broad measure of market performance. The fund generally invests in securities that are included in the Bloomberg US Treasury 1-3 Year Index. The fund does not seek to track the regulatory index.
[12] The Bloomberg US Aggregate Bond Index serves as the fund’s regulatory index and provides a broad measure of market performance. The fund generally invests in securities that are included in the Bloomberg US Treasury 3-10 Year Index. The fund does not seek to track the regulatory index.
[13] The Bloomberg US Aggregate Bond Index serves as the fund’s regulatory index and provides a broad measure of market performance. The fund generally invests in securities that are included in the Bloomberg US Treasury Inflation-Linked Bond Index (Series-L)SM. The fund does not seek to track the regulatory index.
[14] The Bloomberg Municipal Bond Index serves as the fund’s regulatory index and provides a broad measure of market performance. The fund generally invests in securities that are included in the ICE AMT-Free Core U.S. National Municipal Index. The fund does not seek to track the regulatory index.