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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) segment | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Significant Accounting Policies [Line Items] |  |  |
Provision for (benefit from) income taxes | $ 240,403 | $ (1,396,939) | $ 112,347
Number of operating segments | segment | 2 |  |
Fixed-income securities investment portfolio, maximum effective maturity | 40 months |  |
Foreign currency net gains (losses) | $ (13,300) | 6,800 | (2,000)
Revenue remaining performance obligation | 1,307,300 |  |
Costs to obtain contracts | 31,100 | 22,800 |
Amortization of costs to obtain contracts | 17,000 | 10,100 | 7,200
Advertising cost | $ 325,600 | 161,000 | $ 119,100
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]: 2022-01-01 |  |  |
Significant Accounting Policies [Line Items] |  |  |
Expected timing (up to two years for Invisalign Go) | 6 months |  |
Invisalign | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 |  |  |
Significant Accounting Policies [Line Items] |  |  |
Expected timing (up to two years for Invisalign Go) | 5 years |  |
Invisalign Go | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 |  |  |
Significant Accounting Policies [Line Items] |  |  |
Expected timing (up to two years for Invisalign Go) | 2 years |  |
Systems and Services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 |  |  |
Significant Accounting Policies [Line Items] |  |  |
Expected timing (up to two years for Invisalign Go) | 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 (up to two years for Invisalign Go) | 5 years |  |
Revision of Prior Period, Adjustment |  |  |
Significant Accounting Policies [Line Items] |  |  |
Provision for (benefit from) income taxes | $ (16,000) | $ (12,700) |
Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of intangibles | 1 year |  |
Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of intangibles | 15 years |  |

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