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v3.20.2

Income Taxes - Reconciliation of Income Tax (Benefit) at U.S. Federal Statutory Rate to Company's Effective Tax Rate (Detail) | 12 Months Ended
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Sep. 26, 2020 | Sep. 28, 2019 | Sep. 29, 2018
Increase (decrease) in tax resulting from: |  |  |
Income tax (benefit) provision at federal statutory rate | 21.00% | 21.00% | 24.50%
Loss on sale of Cynosure | (31.30%) | 0.00% | 0.00%
Domestic production activities deduction | 0.00% | 0.00% | 3.10%
State income taxes, net of federal benefit | 2.90% | 0.70% | (0.70%)
U.S. tax on foreign earnings | 2.60% | (2.10%) | 0.10%
Internal restructuring | 0.00% | 3.80% | 0.00%
Non-deductible goodwill | 0.00% | 0.00% | (39.40%)
Tax credits | (0.60%) | 3.30% | 1.90%
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Percent | 0 | (0.020) | 0.827
Unrecognized tax benefits | 0.00% | 0.10% | (1.80%)
Compensation | 0.40% | (0.80%) | (0.30%)
Foreign rate differential | (1.20%) | 5.40% | 5.20%
Change in deferred tax rate | (0.60%) | 0.00% | (1.20%)
Change in valuation allowance | 1.30% | (9.50%) | 0.50%
Other | (0.10%) | (3.10%) | (1.00%)
Effective income tax rate | (10.80%) | 21.00% | 73.40%

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- Definition The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to the difference in the deductibility or nondeductibility of executive compensation (i.e., those subject to Section 162(m) limitations), including equity-based compensation and salary and bonus compensation. + References No definition available. + Details
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