    <SEC-DOCUMENT>0001097149-23-000091-index.html : 20231205
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    <ACCEPTANCE-DATETIME>20231205160431
    ACCESSION NUMBER:		0001097149-23-000091
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		16
    CONFORMED PERIOD OF REPORT:	20231204
    ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20231205
    DATE AS OF CHANGE:		20231205

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ALIGN TECHNOLOGY INC
    		CENTRAL INDEX KEY:			0001097149
    		STANDARD INDUSTRIAL CLASSIFICATION:	ORTHOPEDIC, PROSTHETIC & SURGICAL APPLIANCES & SUPPLIES [3842]
    		IRS NUMBER:				943267295
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-32259
    		FILM NUMBER:		231466519

    	BUSINESS ADDRESS:
    		STREET 1:		410 NORTH SCOTTSDALE ROAD, SUITE 1300
    		CITY:			TEMPE
    		STATE:			AZ
    		ZIP:			85288
    		BUSINESS PHONE:		408-470-1000

    	MAIL ADDRESS:
    		STREET 1:		410 NORTH SCOTTSDALE ROAD, SUITE 1300
    		CITY:			TEMPE
    		STATE:			AZ
    		ZIP:			85288
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    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>algn-20231204.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: algn-20231204.htm

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    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>jointannouncement_aligntec.htm
    <DESCRIPTION>EX-99.1
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    Document 2 - file: jointannouncement_aligntec.htm

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    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>3
    <FILENAME>algn-20231204.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
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    <SEQUENCE>6
    <FILENAME>image_0a.jpg
    <DESCRIPTION>GRAPHIC
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    <TEXT>
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    <TYPE>EXCEL
    <SEQUENCE>11
    <FILENAME>Financial_Report.xlsx
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    <TEXT>
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    <TYPE>XML
    <SEQUENCE>12
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    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    <TYPE>XML
    <SEQUENCE>13
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>14
    <FILENAME>FilingSummary.xml
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    <TYPE>JSON
    <SEQUENCE>16
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    <TEXT>
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    <SEQUENCE>17
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