Summary of Significant Accounting Policies (Details) $ / shares in Units, $ in Thousands			6 Months Ended	12 Months Ended
	Apr. 22, 2024 USD ($)	Apr. 24, 2023 USD ($)	Jun. 05, 2025 USD ($)	Dec. 31, 2025 USD ($) segment $ / shares	Dec. 31, 2024 USD ($) $ / shares	Apr. 22, 2024 USD ($)	Dec. 31, 2023 USD ($) $ / shares
Significant Accounting Policies [Line Items]
Number of operating segments \| segment				2
Purchase of equity investment				$ 10,000	$ 106,345		$ 76,999
Foreign currency net losses				(11,300)	21,000		7,000
Accounts receivable sold under factoring arrangements				47,900	52,100
Depreciation				218,600	126,200		126,000
Net Income (Loss)				$ (410,351)	$ (421,362)		$ (445,053)
Earnings Per Share, Basic \| $ / shares				$ (5.66)	$ (5.63)		$ (5.82)
Diluted (usd per share) \| $ / shares				$ (5.65)	$ (5.62)		$ (5.81)
Capitalized computer software, gross				$ 38,500	$ 23,100
Costs to obtain contracts				29,200	25,800
Amortization of costs to obtain contracts				15,600	18,700		$ 12,500
Revenue remaining performance obligation				1,352,700	1,444,900
Advertising cost				188,700	185,000		$ 201,200
Service Life \| Specifically Identified Manufacturing Assets
Significant Accounting Policies [Line Items]
Depreciation				76,900
Net Income (Loss)				$ 53,900
Earnings Per Share, Basic \| $ / shares				$ 0.74
Diluted (usd per share) \| $ / shares				$ 0.74
Heartland
Significant Accounting Policies [Line Items]
Equity interest		5.00%
Purchase of equity investment	$ 75,000	$ 75,000				$ 150,000
Increase to carrying value of equity investments				$ 18,000	$ 6,000
Equity Method Investments				$ 174,000
SD Holding Company
Significant Accounting Policies [Line Items]
Equity interest			3.00%
Purchase of equity investment			$ 40,000
Clear Aligner
Significant Accounting Policies [Line Items]
Warranty period				3 months
Intraoral Scanners
Significant Accounting Policies [Line Items]
Warranty period				1 year
CAD/CAM Software
Significant Accounting Policies [Line Items]
Warranty period				1 year
Invisalign \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Significant Accounting Policies [Line Items]
Expected timing				6 months
Invisalign \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01
Significant Accounting Policies [Line Items]
Expected timing				5 years
Systems and Services
Significant Accounting Policies [Line Items]
Warranty period				1 year
Systems and Services \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Significant Accounting Policies [Line Items]
Expected timing				1 year
Systems and Services \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Significant Accounting Policies [Line Items]
Expected timing				5 years
Minimum
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles				7 years
Maximum
Significant Accounting Policies [Line Items]
Estimated useful lives of intangibles				12 years

ALIGN TECHNOLOGY INC 10-K