American Beacon SiM High Income ETF American Beacon SiM High Income ETF Dabsimhighincomeetffyepro_2862 American Beacon SiM High Income ETF Dabsimhighincomeetffyesai_2863 AB SiM High Income ETF_FYE_08_31_SAI Class American Beacon SiM High Income ETF - C000282586 American Beacon SiM High Income ETF Allocation Risk Allocation Risk [Member] Asset-Backed Securities Risk Asset-Backed Securities Risk [Member] Asset Selection Risk Asset Selection Risk [Member] Callable Securities Risk Callable Securities Risk [Member] Confidential Information Access Risk [Member] Confidential Information Access Risk [Member] Convertible Securities Risk Convertible Securities Risk [Member] Contingent Convertible Securities CoCos Risk Contingent Convertible Securities CoCos Risk [Member] Counterparty Risk Counterparty Risk [Member] Covenant-Lite Obligations Risk Covenant-Lite Obligations Risk [Member] Credit Risk Credit Risk [Member] Currency Risk Currency Risk [Member] Cybersecurity and Operational Risk Cybersecurity and Operational Risk [Member] Debentures Risk Debentures Risk [Member] Derivatives Risk Derivatives Risk [Member] Distressed Securities Risk Distressed Securities Risk [Member] Dividend Risk Dividend Risk [Member] Emerging Markets Risk Emerging Markets Risk [Member] Equity Investments Risk Equity Investments Risk [Member] Exchange-Traded Funds (ETFs) Risk Exchange-Traded Funds (ETFs) Risk [Member] Focused Holdings Risk Focused Holdings Risk [Member] Foreign Investing Risk Foreign Investing Risk [Member] Frontier Markets Risk Frontier Markets Risk [Member] Geographic Concentration Risk Geographic Concentration Risk [Member] Hedging Risk Hedging Risk [Member] High-Yield Securities Risk High-Yield Securities Risk [Member] Interest Rate Risk Interest Rate Risk [Member] Investment Risk Investment Risk [Member] Issuer Risk Issuer Risk [Member] Liquidity Risk Liquidity Risk [Member] Loan Interests Risk Loan Interests Risk [Member] Market Risk Market Risk [Member] Mortgage-Backed and Mortgage-Related Securities Risk Mortgage-Backed and Mortgage-Related Securities Risk [Member] New Fund Risk New Fund Risk [Member] Other Investment Companies Risk Other Investment Companies Risk [Member] Pay-In-Kind Securities Risk Pay-In-Kind Securities Risk [Member] Preferred Stock Risk Preferred Stock Risk [Member] Prepayment and Extension Risk Prepayment and Extension Risk [Member] Redemption Risk Redemption Risk [Member] Reliance on Corporate Management and Financial Reporting Risk Reliance on Corporate Management and Financial Reporting Risk [Member] Restricted Securities Risk Restricted Securities Risk [Member] Secured, Partially Secured and Unsecured Obligation Risk Secured, Partially Secured and Unsecured Obligation Risk [Member] Securities Selection Risk Securities Selection Risk [Member] Unrated Securities Risk Unrated Securities Risk [Member] U.S. Government Securities and Government-Sponsored Enterprises Risk U.S. Government Securities and Government-Sponsored Enterprises Risk [Member] Valuation Risk Valuation Risk [Member] Variable and Floating Rate Securities Risk Variable and Floating Rate Securities Risk [Member] Volatility Risk Volatility Risk [Member]