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Operating Segments and Geographic Information - Additional Information (Details)
$ in Millions
12 Months Ended
Dec. 31, 2018
USD ($)
Segment
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Segment Reporting Information [Line Items]      
Number of reportable segments | Segment 2    
Anixter International Inc.      
Segment Reporting Information [Line Items]      
Revenues generated from sales $ 309.0 $ 292.2 $ 286.2
Accounts receivable outstanding $ 37.0    
Anixter International Inc. | Customer Concentration Risk      
Segment Reporting Information [Line Items]      
Percentage of total accounts receivable outstanding 8.00%    
Anixter International Inc. | Customer Concentration Risk | Revenues      
Segment Reporting Information [Line Items]      
Percent of total revenues 12.00% 12.00% 12.00%