S000079470 [Member] Expense Example - AB Disruptors ETF - AB Disruptors ETF	Nov. 30, 2025 USD ($)
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 66
Expense Example, with Redemption, 3 Years	208
Expense Example, with Redemption, 5 Years	362
Expense Example, with Redemption, 10 Years	$ 810

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