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Operating Segments and Geographic Information - Additional Information (Detail) $ in Millions | 12 Months Ended
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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 |  |

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