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Legal Proceedings (Details) $ in Thousands			1 Months Ended	3 Months Ended
	Sep. 08, 2023 USD ($)	Oct. 27, 2022 USD ($)	Jan. 31, 2019 claim	Mar. 31, 2024 USD ($)
Legal Proceedings [Abstract]
Number of lawsuits filed | claim			3
Litigation settlement, expense				$ 575
Gain contingency, amount awarded	$ 63,000	$ 63,000

X

- Definition

Legal Proceedings [Abstract]

+ References

No definition available.

+ Details

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Namespace Prefix:	algn_
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Balance Type:	na
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X

- Definition

Amount awarded from other party in judgment or settlement of litigation.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

+ References

No definition available.

+ Details

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X

- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483076/450-20-50-4

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483076/450-20-50-9

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