AB Equity Premium Income ETF S000106803 [Member] C000277689 [Member] Equity Securities Risk [Member] Derivatives Risks [Member] Options Writing Risk [Member] Options Valuation Risk [Member] FLEX Options Correlation Risk [Member] FLEX Options Liquidity Risk [Member] Tax Risk [Member] Strategy and Return of Capital Tax Risk [Member] Active Trading Risk [Member] Investment in Other Investment Companies 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]