Annual report pursuant to Section 13 and 15(d)

Product Information - Summary of Segment Percentages (Details)

v3.8.0.1
Product Information - Summary of Segment Percentages (Details) - Sales Revenue, Product Line - Product Concentration Risk - Base USAP
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Segment Reporting Information [Line Items]      
Percent of revenue 100.00% 100.00% 100.00%
Private Label Collision      
Segment Reporting Information [Line Items]      
Percent of revenue 54.00% 51.00% 48.00%
Private Label Engine      
Segment Reporting Information [Line Items]      
Percent of revenue 18.00% 15.00% 14.00%
Private Label Performance      
Segment Reporting Information [Line Items]      
Percent of revenue 1.00% 1.00% 1.00%
Branded Collision      
Segment Reporting Information [Line Items]      
Percent of revenue 2.00% 2.00% 2.00%
Branded Engine      
Segment Reporting Information [Line Items]      
Percent of revenue 10.00% 12.00% 14.00%
Branded Performance      
Segment Reporting Information [Line Items]      
Percent of revenue 15.00% 19.00% 21.00%