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Income Taxes - Additional Information (Detail) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 28, 2020
Dec. 28, 2020
Dec. 30, 2019
Dec. 31, 2018
Dec. 28, 2015
Income Taxes [Line Items]          
Deferred tax liability, undistributed earnings of foreign subsidiaries $ 0 $ 0      
Unrecognized deferred tax liability related to undistributed earnings 2,797,000 2,797,000      
Tax credit carryforward, total 48,580,000 48,580,000      
Tax credit carryforwards not subject to expiration 6,233,000 6,233,000      
Reduced prior years’ uncertain tax positions 27,283,000 27,283,000 $ 103,000 $ 2,140,000  
Unrecognized tax benefits including income tax penalties and interest accrued 1,046,000 1,046,000 25,805,000    
Unrecognized tax benefits, income tax penalties and interest accrued 1,566,000 1,566,000 13,531,000    
Reduction in deferred tax assets   6,358,000 $ 19,225,000    
Unrecognized tax benefits that would impact effective tax rate 2,612,000 2,612,000      
Decrease in unrecognized tax benefits over the next 12 months resulting from expiring statues 384,000 384,000      
Unrecognized tax benefits, interest and penalties   701,000      
TTM Viasystems Group Inc          
Income Taxes [Line Items]          
Utilization of the U.S. net operating losses         $ 9,826,000
Increase in utilization of the U.S. net operating losses         $ 47,463,000
Net operating loss utilization period         5 years
TTM Viasystems Group Inc | Minimum          
Income Taxes [Line Items]          
Percentage of change in ownership         50.00%
UNITED STATES          
Income Taxes [Line Items]          
Net operating loss carryforwards 117,908,000 $ 117,908,000      
UNITED STATES | Earliest Tax Year          
Income Taxes [Line Items]          
Expiration year, operating loss carryforwards   2027      
UNITED STATES | Latest Tax Year          
Income Taxes [Line Items]          
Expiration year, operating loss carryforwards   2036      
Various U.S. States          
Income Taxes [Line Items]          
Net operating loss carryforwards 25,723,000 $ 25,723,000      
Various U.S. States | Earliest Tax Year          
Income Taxes [Line Items]          
Expiration year, operating loss carryforwards   2021      
Various U.S. States | Latest Tax Year          
Income Taxes [Line Items]          
Expiration year, operating loss carryforwards   2036      
CHINA          
Income Taxes [Line Items]          
Net operating loss carryforwards 47,957,000 $ 47,957,000      
CHINA | Earliest Tax Year          
Income Taxes [Line Items]          
Expiration year, operating loss carryforwards   2021      
CHINA | Latest Tax Year          
Income Taxes [Line Items]          
Expiration year, operating loss carryforwards   2027      
HONG KONG          
Income Taxes [Line Items]          
Net operating loss carryforwards 26,940,000 $ 26,940,000      
Foreign          
Income Taxes [Line Items]          
Deferred tax liability, undistributed earnings of foreign subsidiaries 2,458,000 2,458,000      
Undistributed earnings of foreign subsidiaries 60,769,000 $ 60,769,000      
Foreign | Earliest Tax Year          
Income Taxes [Line Items]          
Tax year remain subject to examination   2010      
Foreign | Latest Tax Year          
Income Taxes [Line Items]          
Tax year remain subject to examination   2020      
State and Local          
Income Taxes [Line Items]          
Deferred tax liability, undistributed earnings of foreign subsidiaries $ 1,548,000 $ 1,548,000      
NOL and credit carryforward post utilization adjustment term   4 years      
State and Local | Earliest Tax Year          
Income Taxes [Line Items]          
Tax year remain subject to examination   2016      
State and Local | Latest Tax Year          
Income Taxes [Line Items]          
Tax year remain subject to examination   2020      
U.S. Federal          
Income Taxes [Line Items]          
NOL and credit carryforward post utilization adjustment term   3 years      
U.S. Federal | Earliest Tax Year          
Income Taxes [Line Items]          
Tax year remain subject to examination   2017      
U.S. Federal | Latest Tax Year          
Income Taxes [Line Items]          
Tax year remain subject to examination   2020