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Label	Element	Value
IQ MacKay Municipal Insured ETF
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	INDEXIQ ACTIVE ETF TRUST IQ MACKAY MUNICIPAL INSURED ETF Supplement dated May 10, 2021 (“Supplement”) to the Summary Prospectus and Prospectus dated August 28, 2020 Capitalized terms and certain other terms used in this Supplement, unless otherwise defined in this Supplement, have the meanings assigned to them in the Prospectuses.
Risk/Return [Heading]	rr_RiskReturnHeading	IQ MacKay Municipal Insured ETF
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	Effective immediately, all references to the “Bloomberg Barclays Municipal Insured Bond Index”are hereby deleted in their entirety and replaced with “Bloomberg Barclays Municipal All Insured Bond Index”.
Performance Table Closing [Text Block]	rr_PerformanceTableClosingTextBlock	PLEASE RETAIN THIS SUPPLEMENT FOR YOUR FUTURE REFERENCE

If the Fund has annual returns for at least one calendar year, provide a table showing the Fund's (A) average annual total return; (B) average annual total return (after taxes on distributions); and (C) average annual total return (after taxes on distributions and redemption). A Money Market Fund should show only the returns described in clause (A) of the preceding sentence. All returns should be shown for 1-, 5-, and 10- calendar year periods ending on the date of the most recently completed calendar year (or for the life of the Fund, if shorter), but only for periods subsequent to the effective date of the Fund's registration statement. The table also should show the returns of an appropriate broad-based securities market index as defined in Instruction 5 to Item 22(b)(7) for the same periods. A Fund that has been in existence for more than 10 years also may include returns for the life of the Fund. A Money Market Fund may provide the Fund's 7-day yield ending on the date of the most recent calendar year or disclose a toll-free (or collect) telephone number that investors can use to obtain the Fund's current 7-day yield. For a Fund (other than a Money Market Fund or a Fund described in General Instruction C.3.(d)(iii)), provide the information in the following table with the specified captions AVERAGE ANNUAL TOTAL RETURNS (For the periods ended December 31, _____). For a Fund that provides annual total returns for only one calendar year or for a Fund that does not include the bar chart because it does not have annual returns for a full calendar year, modify, as appropriate, the narrative explanation required by paragraph (c)(2)(i) (e.g., by stating that the information gives some indication of the risks of an investment in the Fund by comparing the Fund's performance with a broad measure of market performance).

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