v3.26.1
Shareholder Report, Holdings (Details)
Jun. 30, 2026
Schwab U.S. TIPS ETF | Treasuries [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00%
Schwab U.S. TIPS ETF | Short Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.00% [1],[2]
Schwab Short-Term U.S. Treasury ETF | Treasuries [Member]  
Holdings [Line Items]  
Percent of Total Investments 99.80%
Schwab Short-Term U.S. Treasury ETF | Short Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.20% [1]
Schwab Intermediate-Term U.S. Treasury ETF | Treasuries [Member]  
Holdings [Line Items]  
Percent of Total Investments 99.80%
Schwab Intermediate-Term U.S. Treasury ETF | Short Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.20% [1]
Schwab Long-Term U.S. Treasury ETF | Treasuries [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00%
Schwab Long-Term U.S. Treasury ETF | Short Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.00% [1],[2]
Schwab U.S. Aggregate Bond ETF | Treasuries [Member]  
Holdings [Line Items]  
Percent of Total Investments 45.60%
Schwab U.S. Aggregate Bond ETF | Short Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.70% [1]
Schwab U.S. Aggregate Bond ETF | Securitized [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.10%
Schwab U.S. Aggregate Bond ETF | Government Related [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.10%
Schwab U.S. Aggregate Bond ETF | Corporates [Member]  
Holdings [Line Items]  
Percent of Total Investments 23.50%
Schwab 1-5 Year Corporate Bond ETF | Short Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.30% [1],[3]
Schwab 1-5 Year Corporate Bond ETF | Corporates [Member]  
Holdings [Line Items]  
Percent of Total Investments 98.70% [3]
Schwab 5-10 Year Corporate Bond ETF | Short Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.30% [1],[3]
Schwab 5-10 Year Corporate Bond ETF | Corporates [Member]  
Holdings [Line Items]  
Percent of Total Investments 98.70% [3]
Schwab Municipal Bond ETF | Revenue Bonds [Member]  
Holdings [Line Items]  
Percent of Total Investments 65.40%
Schwab Municipal Bond ETF | General Obligation Bonds [Member]  
Holdings [Line Items]  
Percent of Total Investments 32.20%
Schwab Municipal Bond ETF | Pre-Refunded [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.40%
Schwab Municipal Bond ETF | Other [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00%
Schwab Core Bond ETF | Securitized [Member]  
Holdings [Line Items]  
Percent of Total Investments 29.60%
Schwab Core Bond ETF | Government Related [Member]  
Holdings [Line Items]  
Percent of Total Investments 21.30%
Schwab Core Bond ETF | U.S. Treasury Obligations [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.20%
Schwab Core Bond ETF | Short-Term Investments{1} [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.50% [1]
Schwab Core Bond ETF | Corporates [Member]  
Holdings [Line Items]  
Percent of Total Investments 31.40%
Schwab Ultra-Short Income ETF | Corporates [Member]  
Holdings [Line Items]  
Percent of Total Investments 35.40%
Schwab Ultra-Short Income ETF | Commercial Paper [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.50%
Schwab Ultra-Short Income ETF | Certificates of Deposit [Member]  
Holdings [Line Items]  
Percent of Total Investments 23.00%
Schwab Ultra-Short Income ETF | Variable Rate Demand Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.50%
Schwab Ultra-Short Income ETF | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.60%
Schwab Government Money Market ETF | 1 to 7 Days [Member]  
Holdings [Line Items]  
Percent of Total Investments 80.70%
Schwab Government Money Market ETF | 8 to 30 Days [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.80%
Schwab Government Money Market ETF | 31 to 60 Days [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.70%
Schwab Government Money Market ETF | 61 to 90 Days [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.30%
Schwab Government Money Market ETF | 91 to 180 Days [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.20%
Schwab Government Money Market ETF | Over 180 Days [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.30%
Schwab Government Money Market ETF | Repurchase Agreements [Member]  
Holdings [Line Items]  
Percent of Total Investments 70.30%
Schwab Government Money Market ETF | Repurchase Agreements U.S. Government Agency [Member]  
Holdings [Line Items]  
Percent of Total Investments 37.10%
Schwab Government Money Market ETF | U.S. Government Agency Debt [Member]  
Holdings [Line Items]  
Percent of Total Investments 21.10%
Schwab Government Money Market ETF | U.S. Treasury Debt [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.60%
Schwab Government Money Market ETF | Repurchase Agreements U.S. Treasury [Member]  
Holdings [Line Items]  
Percent of Total Investments 33.20%
[1] Includes the fund’s position in money market mutual funds registered under the Investment Company Act of 1940, as amended.
[2] Less than 0.05%.
[3] Excludes derivatives.