SUMMARIZED FINANCIAL INFORMATION OF ANIXTER INC - CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jul. 01, 2016	Jun. 30, 2017	Jul. 01, 2016
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 2,001.4	$ 1,955.7	$ 3,897.2	$ 3,771.9
Operating income	82.7	56.7	151.7	117.0
Income from continuing operations before income taxes	63.8	36.1	113.7	73.5
Net income from discontinued operations	0.0	(0.3)	0.0	(0.7)
Net income	40.1	20.5	71.0	43.3
Comprehensive income	50.0	22.3	95.9	64.4
Anixter Inc. [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	2,001.4	1,955.7	3,897.2	3,771.9
Operating income	84.6	58.2	155.2	120.1
Income from continuing operations before income taxes	65.4	37.4	116.7	76.1
Net income from discontinued operations	0.0	(0.3)	0.0	(0.7)
Net income	41.2	21.2	72.9	44.8
Comprehensive income	$ 51.0	$ 23.0	$ 97.7	$ 65.9