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Income Taxes - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 25, 2021
Apr. 03, 2021
Apr. 04, 2020
Apr. 03, 2021
Apr. 04, 2020
Business Acquisition [Line Items]          
Effective income tax rate (percent)   20.40% 7.90% 14.10% 7.70%
U.S. federal statutory rate       21.00%  
Lumentum Holdings Inc.          
Business Acquisition [Line Items]          
Merger and acquisition costs $ 217,600,000