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Income Taxes - Summary of Differences Between U.S. Federal Statutory Tax Rate and Company's Consolidated Effective Tax Rate (Detail)	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
U.S. federal statutory tax rate	21.00%	21.00%	21.00%	21.00%
State income taxes (net of federal benefit)	0.40%	2.20%	3.10%	2.30%
Reserves for uncertain tax positions	(2.00%)	0.30%	(2.40%)	0.20%
Cessation of operations	(1.10%)	0.00%	(1.30%)	(1.60%)
Research and development credit	(0.40%)	(0.10%)	(1.10%)	(0.40%)
Tax windfall on share-based awards	0.10%	(4.50%)	0.20%	(18.90%)
GILTI	1.30%	2.90%	3.20%	4.50%
FDII	(0.90%)	(1.20%)	(2.30%)	(1.90%)
Impact of foreign operations	2.20%	0.60%	1.80%	(0.40%)
Other	2.80%	0.70%	2.00%	1.40%
Total effective tax rate	23.60%	21.90%	24.20%	6.20%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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