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Operating Segments and Geographic Information - Additional Information (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
Segment
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Segment Reporting Information [Line Items]      
Number of Reportable Segments | Segment 4    
Anixter International Inc. [Member]      
Segment Reporting Information [Line Items]      
Revenues generated from sales $ 286.2 $ 281.9 $ 290.5
Accounts receivable outstanding $ 26.5    
Anixter International Inc. [Member] | Customer Concentration Risk [Member]      
Segment Reporting Information [Line Items]      
Percentage of total accounts receivable outstanding 7.00%    
Anixter International Inc. [Member] | Customer Concentration Risk [Member] | Revenues [Member]      
Segment Reporting Information [Line Items]      
Percent of total revenues 12.00% 12.00% 13.00%
M2 FX Limited [Member]      
Segment Reporting Information [Line Items]      
Inventories $ 0.2