AB Equity Income ETF S000106695 [Member] S&P 500 Index (reflects no deduction for fees, expenses, or taxes) SP 500 Index [Member] C000277581 [Member] Advisor Class Advisor Class [Member] Equity Securities Risk [Member] Foreign Non US Investments Risk [Member] Currency Risk [Member] Derivatives Risks [Member] Sector Risk [Member] Capital Gain Risk [Member] ETF Share Price and Net Asset Value Risk [Member] Authorized Participant Risk [Member] Active Trading Market Risk [Member] Management Risk [Member] Market Risks [Member]