v3.26.3
Shareholder Report, Holdings (Details)
Aug. 31, 2026
Schwab U.S. REIT ETF | Welltower, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
Schwab U.S. REIT ETF | Prologis, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
Schwab U.S. REIT ETF | Simon Property Group, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
Schwab U.S. REIT ETF | Digital Realty Trust, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Schwab U.S. REIT ETF | Equinix, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Schwab U.S. REIT ETF | American Tower Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Schwab U.S. REIT ETF | Realty Income Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Schwab U.S. REIT ETF | Public Storage [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Schwab U.S. REIT ETF | Vivmark Residential [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
Schwab U.S. REIT ETF | Ventas, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Schwab U.S. REIT ETF | Health Care REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 19.80% [1]
Schwab U.S. REIT ETF | Retail REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.70% [1]
Schwab U.S. REIT ETF | Industrial REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.50% [1]
Schwab U.S. REIT ETF | Data Center REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [1]
Schwab U.S. REIT ETF | Telecom Tower REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [1]
Schwab U.S. REIT ETF | Multi-Family Residential REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.50% [1]
Schwab U.S. REIT ETF | Other Specialized REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.40% [1]
Schwab U.S. REIT ETF | Self Storage REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.50% [1]
Schwab U.S. REIT ETF | Single-Family Residential REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.80% [1]
Schwab U.S. REIT ETF | Office REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [1]
Schwab U.S. REIT ETF | Hotel & Resort REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90% [1]
Schwab U.S. REIT ETF | Diversified REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20% [1]
Schwab U.S. REIT ETF | Timber REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.60% [1]
Schwab U.S. REIT ETF | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.20% [1],[2]
Schwab Fundamental U.S. Broad Market ETF | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Schwab Fundamental U.S. Broad Market ETF | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Schwab Fundamental U.S. Broad Market ETF | ExxonMobil Holdings Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Schwab Fundamental U.S. Broad Market ETF | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Schwab Fundamental U.S. Broad Market ETF | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Schwab Fundamental U.S. Broad Market ETF | JPMorgan Chase & Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Schwab Fundamental U.S. Broad Market ETF | Chevron Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Schwab Fundamental U.S. Broad Market ETF | Berkshire Hathaway, Inc., Class B [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Schwab Fundamental U.S. Broad Market ETF | UnitedHealth Group, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Schwab Fundamental U.S. Broad Market ETF | Intel Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Schwab Fundamental U.S. Broad Market ETF | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.00% [1],[3]
Schwab Fundamental U.S. Broad Market ETF | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.60% [1]
Schwab Fundamental U.S. Broad Market ETF | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.20% [1]
Schwab Fundamental U.S. Broad Market ETF | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.90% [1]
Schwab Fundamental U.S. Broad Market ETF | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.80% [1]
Schwab Fundamental U.S. Broad Market ETF | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.80% [1]
Schwab Fundamental U.S. Broad Market ETF | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.30% [1]
Schwab Fundamental U.S. Broad Market ETF | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.20% [1]
Schwab Fundamental U.S. Broad Market ETF | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [1]
Schwab Fundamental U.S. Broad Market ETF | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90% [1]
Schwab Fundamental U.S. Broad Market ETF | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20% [1]
Schwab Fundamental U.S. Broad Market ETF | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [1],[2]
Schwab Fundamental U.S. Broad Market ETF | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [1]
Schwab Fundamental U.S. Large Company ETF | Apple, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Schwab Fundamental U.S. Large Company ETF | Microsoft Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Schwab Fundamental U.S. Large Company ETF | ExxonMobil Holdings Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Schwab Fundamental U.S. Large Company ETF | Amazon.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Schwab Fundamental U.S. Large Company ETF | Alphabet, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Schwab Fundamental U.S. Large Company ETF | JPMorgan Chase & Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Schwab Fundamental U.S. Large Company ETF | Chevron Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Schwab Fundamental U.S. Large Company ETF | Berkshire Hathaway, Inc., Class B [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Schwab Fundamental U.S. Large Company ETF | UnitedHealth Group, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Schwab Fundamental U.S. Large Company ETF | Intel Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Schwab Fundamental U.S. Large Company ETF | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.40% [1]
Schwab Fundamental U.S. Large Company ETF | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.50% [1]
Schwab Fundamental U.S. Large Company ETF | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.40% [1]
Schwab Fundamental U.S. Large Company ETF | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.70% [1]
Schwab Fundamental U.S. Large Company ETF | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.50% [1]
Schwab Fundamental U.S. Large Company ETF | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.70% [1]
Schwab Fundamental U.S. Large Company ETF | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.50% [1]
Schwab Fundamental U.S. Large Company ETF | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.20% [1]
Schwab Fundamental U.S. Large Company ETF | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.90% [1]
Schwab Fundamental U.S. Large Company ETF | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.60% [1]
Schwab Fundamental U.S. Large Company ETF | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [1],[2]
Schwab Fundamental U.S. Large Company ETF | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.50% [1]
Schwab Fundamental U.S. Small Company ETF | Lumentum Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Schwab Fundamental U.S. Small Company ETF | Victoria's Secret & Co. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Schwab Fundamental U.S. Small Company ETF | Compass, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Schwab Fundamental U.S. Small Company ETF | Delek U.S. Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Schwab Fundamental U.S. Small Company ETF | Abercrombie & Fitch Co., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Schwab Fundamental U.S. Small Company ETF | Par Pacific Holdings, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Schwab Fundamental U.S. Small Company ETF | Twilio, Inc., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Schwab Fundamental U.S. Small Company ETF | Crescent Energy Co., Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Schwab Fundamental U.S. Small Company ETF | MKS, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Schwab Fundamental U.S. Small Company ETF | Royalty Pharma PLC, Class A [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Schwab Fundamental U.S. Small Company ETF | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.10% [1]
Schwab Fundamental U.S. Small Company ETF | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.80% [1]
Schwab Fundamental U.S. Small Company ETF | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.90% [1]
Schwab Fundamental U.S. Small Company ETF | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.10% [1]
Schwab Fundamental U.S. Small Company ETF | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.10% [1]
Schwab Fundamental U.S. Small Company ETF | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.90% [1]
Schwab Fundamental U.S. Small Company ETF | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 19.10% [1]
Schwab Fundamental U.S. Small Company ETF | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.40% [1]
Schwab Fundamental U.S. Small Company ETF | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.60% [1]
Schwab Fundamental U.S. Small Company ETF | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.90% [1]
Schwab Fundamental U.S. Small Company ETF | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.10% [1],[2]
Schwab Fundamental U.S. Small Company ETF | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [1]
Schwab Fundamental International Equity ETF | Samsung Electronics Co. Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Schwab Fundamental International Equity ETF | Shell PLC [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Schwab Fundamental International Equity ETF | BHP Group Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Schwab Fundamental International Equity ETF | Glencore PLC [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Schwab Fundamental International Equity ETF | HSBC Holdings PLC [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Schwab Fundamental International Equity ETF | BP PLC [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Schwab Fundamental International Equity ETF | Toyota Motor Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Schwab Fundamental International Equity ETF | Roche Holding AG [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Schwab Fundamental International Equity ETF | Banco Santander SA [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Schwab Fundamental International Equity ETF | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.70% [1]
Schwab Fundamental International Equity ETF | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.90% [1]
Schwab Fundamental International Equity ETF | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.10% [1]
Schwab Fundamental International Equity ETF | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.20% [1]
Schwab Fundamental International Equity ETF | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.20% [1]
Schwab Fundamental International Equity ETF | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.60% [1]
Schwab Fundamental International Equity ETF | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.80% [1]
Schwab Fundamental International Equity ETF | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.20% [1]
Schwab Fundamental International Equity ETF | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.70% [1]
Schwab Fundamental International Equity ETF | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.70% [1]
Schwab Fundamental International Equity ETF | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.40% [1],[2]
Schwab Fundamental International Equity ETF | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.50% [1]
Schwab Fundamental International Equity ETF | SPAIN  
Holdings [Line Items]  
Percent of Total Investments 3.10% [1]
Schwab Fundamental International Equity ETF | NETHERLANDS  
Holdings [Line Items]  
Percent of Total Investments 2.90% [1]
Schwab Fundamental International Equity ETF | JAPAN  
Holdings [Line Items]  
Percent of Total Investments 22.90%
Schwab Fundamental International Equity ETF | CANADA  
Holdings [Line Items]  
Percent of Total Investments 8.80% [1]
Schwab Fundamental International Equity ETF | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Total Investments 8.90% [1]
Schwab Fundamental International Equity ETF | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 13.50% [1]
Schwab Fundamental International Equity ETF | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 4.80% [1]
Schwab Fundamental International Equity ETF | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 8.00% [1]
Schwab Fundamental International Equity ETF | GERMANY  
Holdings [Line Items]  
Percent of Total Investments 8.00% [1]
Schwab Fundamental International Equity ETF | SWITZERLAND  
Holdings [Line Items]  
Percent of Total Investments 4.80% [1]
Schwab Fundamental International Equity ETF | Other Countries [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.30% [1]
Schwab Fundamental International Small Equity ETF | Ibiden Co. Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Schwab Fundamental International Small Equity ETF | Daewoo Engineering & Construction Co. Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Schwab Fundamental International Small Equity ETF | Samsung Life Insurance Co. Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Schwab Fundamental International Small Equity ETF | Samsung E&A Co. Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Schwab Fundamental International Small Equity ETF | GS Engineering & Construction Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Schwab Fundamental International Small Equity ETF | easyJet PLC [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Schwab Fundamental International Small Equity ETF | Tower Semiconductor Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Schwab Fundamental International Small Equity ETF | Baytex Energy Corp. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Schwab Fundamental International Small Equity ETF | Helvetia Baloise Holding AG [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Schwab Fundamental International Small Equity ETF | DL E&C Co. Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
Schwab Fundamental International Small Equity ETF | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.60% [1]
Schwab Fundamental International Small Equity ETF | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.20% [1]
Schwab Fundamental International Small Equity ETF | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.50% [1]
Schwab Fundamental International Small Equity ETF | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.10% [1]
Schwab Fundamental International Small Equity ETF | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.50% [1]
Schwab Fundamental International Small Equity ETF | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.70% [1]
Schwab Fundamental International Small Equity ETF | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 23.40% [1]
Schwab Fundamental International Small Equity ETF | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.50% [1]
Schwab Fundamental International Small Equity ETF | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.70% [1]
Schwab Fundamental International Small Equity ETF | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.50% [1]
Schwab Fundamental International Small Equity ETF | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50% [1],[2]
Schwab Fundamental International Small Equity ETF | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.80% [1]
Schwab Fundamental International Small Equity ETF | JAPAN  
Holdings [Line Items]  
Percent of Total Investments 29.20% [1]
Schwab Fundamental International Small Equity ETF | CANADA  
Holdings [Line Items]  
Percent of Total Investments 8.60% [1]
Schwab Fundamental International Small Equity ETF | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Total Investments 8.10% [1]
Schwab Fundamental International Small Equity ETF | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 8.00% [1]
Schwab Fundamental International Small Equity ETF | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 5.00% [1]
Schwab Fundamental International Small Equity ETF | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 3.90% [1]
Schwab Fundamental International Small Equity ETF | GERMANY  
Holdings [Line Items]  
Percent of Total Investments 3.50% [1]
Schwab Fundamental International Small Equity ETF | SWITZERLAND  
Holdings [Line Items]  
Percent of Total Investments 3.40% [1]
Schwab Fundamental International Small Equity ETF | SWEDEN  
Holdings [Line Items]  
Percent of Total Investments 3.40% [1]
Schwab Fundamental International Small Equity ETF | Other Countries [Member]  
Holdings [Line Items]  
Percent of Total Investments 26.90% [1]
Schwab Fundamental Emerging Markets Equity ETF | Taiwan Semiconductor Manufacturing Co. Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Schwab Fundamental Emerging Markets Equity ETF | Alibaba Group Holding Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Schwab Fundamental Emerging Markets Equity ETF | Hon Hai Precision Industry Co. Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Schwab Fundamental Emerging Markets Equity ETF | China Construction Bank Corp., H Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Schwab Fundamental Emerging Markets Equity ETF | Vale SA [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Schwab Fundamental Emerging Markets Equity ETF | Petroleo Brasileiro SA - Petrobras - Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Schwab Fundamental Emerging Markets Equity ETF | Petroleo Brasileiro SA - Petrobras - Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Schwab Fundamental Emerging Markets Equity ETF | Tencent Holdings Ltd. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Schwab Fundamental Emerging Markets Equity ETF | Industrial & Commercial Bank of China Ltd., H Shares [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Schwab Fundamental Emerging Markets Equity ETF | JD.com, Inc. [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Schwab Fundamental Emerging Markets Equity ETF | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 24.90% [1]
Schwab Fundamental Emerging Markets Equity ETF | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 20.60% [1]
Schwab Fundamental Emerging Markets Equity ETF | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.60% [1]
Schwab Fundamental Emerging Markets Equity ETF | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.80% [1]
Schwab Fundamental Emerging Markets Equity ETF | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.80% [1]
Schwab Fundamental Emerging Markets Equity ETF | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.10% [1]
Schwab Fundamental Emerging Markets Equity ETF | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.80% [1]
Schwab Fundamental Emerging Markets Equity ETF | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.30% [1]
Schwab Fundamental Emerging Markets Equity ETF | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.40% [1]
Schwab Fundamental Emerging Markets Equity ETF | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.30% [1]
Schwab Fundamental Emerging Markets Equity ETF | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [1],[2]
Schwab Fundamental Emerging Markets Equity ETF | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.40% [1]
Schwab Fundamental Emerging Markets Equity ETF | CHINA  
Holdings [Line Items]  
Percent of Total Investments 29.60% [1]
Schwab Fundamental Emerging Markets Equity ETF | TAIWAN  
Holdings [Line Items]  
Percent of Total Investments 24.50% [1]
Schwab Fundamental Emerging Markets Equity ETF | BRAZIL  
Holdings [Line Items]  
Percent of Total Investments 12.30% [1]
Schwab Fundamental Emerging Markets Equity ETF | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Total Investments 4.90% [1]
Schwab Fundamental Emerging Markets Equity ETF | THAILAND  
Holdings [Line Items]  
Percent of Total Investments 3.00% [1]
Schwab Fundamental Emerging Markets Equity ETF | HONG KONG  
Holdings [Line Items]  
Percent of Total Investments 2.60% [1]
Schwab Fundamental Emerging Markets Equity ETF | Other Countries [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.50% [1]
Schwab Fundamental Emerging Markets Equity ETF | INDIANA  
Holdings [Line Items]  
Percent of Total Investments 9.10% [1]
Schwab Fundamental Emerging Markets Equity ETF | NEW MEXICO  
Holdings [Line Items]  
Percent of Total Investments 3.50% [1]
[1] Excludes derivatives.
[2] Includes the fund’s position(s) in money market mutual funds registered under the Investment Company Act of 1940, as amended.
[3] Amount is less than 0.05%.