For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Revenue - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
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Contract liability	$ 197.8		197.8		$ 166.8
Revenue recognized			$ 132.0	$ 87.4
Revenue Benchmark \| Customer Concentration Risk \| Largest customer
Disaggregation of Revenue [Line Items]
Concentration risk percentage	12.00%	11.00%	12.00%	10.00%
Clear Aligner Treatment Plans
Disaggregation of Revenue [Line Items]
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Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-09-27
Disaggregation of Revenue [Line Items]
Expected timing of satisfaction	12 months		12 months