Select STOXX Europe Aerospace & Defense ETF Select STOXX Europe Aerospace & Defense ETF Equity Securities Risk [Member] Market Risk [Member] Sampling Risk [Member] Valuation Risk [Member] Concentration Risk [Member] Sector Risk [Member] Large Capitalization Risk [Member] Mid-Cap Securities Risk [Member] Foreign Securities Risk [Member] Counterparty Risk [Member] Derivatives Risk [Member] Swap Risk [Member] Currency Risk [Member] ETF Structure Risks [Member] Authorized Participant Risk [Member] Limited History of Operations Risk [Member] Cybersecurity Risk [Member] Investment Risk [Member] Early Close/Trading Halt Risk [Member] Passive Investment Risk [Member] Tracking Error Risk [Member] Tracking Error Risk Member Authorized Participant Risk Member Cybersecurity Risk Member Passive Investment Risk Member Sector Risk Member Mid Cap Securities Risk Member Investment Risk Member Early Close Trading Halt Risk Member Swap Risk Member Concentration Risk Member Counterparty Risk Member Foreign Securities Risk Member Market Risk Member Sampling Risk Member ETFStructure Risks Member Valuation Risk Member Currency Risk Member C000253611 Member Derivatives Risk Member Equity Securities Risk Member Limited History Of Operations Risk Member S000087726 Member Large Capitalization Risk Member