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Operating Segments and Geographic Information - Additional Information (Details)
$ in Millions
12 Months Ended
Dec. 31, 2017
USD ($)
Segment
Dec. 31, 2017
USD ($)
Reporting_Unit
Dec. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Segment Reporting Information [Line Items]            
Number of reportable segments 4 5        
Anixter International Inc. [Member]            
Segment Reporting Information [Line Items]            
Revenues generated from sales     $ 292.2   $ 286.2 $ 281.9
Accounts receivable outstanding $ 38.2 $ 38.2 $ 38.2 $ 38.2    
Anixter International Inc. [Member] | Customer Concentration Risk [Member]            
Segment Reporting Information [Line Items]            
Percentage of total accounts receivable outstanding 8.00% 8.00% 8.00% 8.00%    
Anixter International Inc. [Member] | Customer Concentration Risk [Member] | Revenues [Member]            
Segment Reporting Information [Line Items]            
Percent of total revenues       12.00% 12.00% 12.00%