SUMMARIZED FINANCIAL INFORMATION OF ANIXTER INC - CONDENSED CONSOLIDATED BALANCE SHEETS (Detail) - USD ($) $ in Millions	Jun. 28, 2019	Mar. 29, 2019	Dec. 29, 2018	Dec. 28, 2018	Jun. 29, 2018	Mar. 30, 2018	Dec. 29, 2017
Assets:
Current assets	$ 3,199.8			$ 3,172.0
Property and equipment, net	161.6			163.3
Operating leases	229.9		$ 244.1	0.0
Goodwill	838.4			832.0
Intangible assets, net	377.5			392.9
Other assets	103.5			92.9
Total assets	4,910.7			4,653.1
Liabilities and Stockholders' Equity:
Current liabilities	1,535.7			1,629.0
Long-term debt	1,303.0			1,252.7
Operating lease obligations	178.3			0.0
Other liabilities	195.8			201.0
Stockholders' equity	1,697.9	$ 1,620.7		1,570.4	$ 1,507.4	$ 1,491.9	$ 1,459.0
Total liabilities and stockholders’ equity	4,910.7			4,653.1
Anixter Inc. [Member]
Assets:
Current assets				3,171.6	3,198.3
Property and equipment, net				169.1	166.8
Operating leases				0.0	220.7
Goodwill				832.0	838.4
Intangible assets, net				392.9	377.5
Other assets				92.9	103.5
Total assets				4,658.5	4,905.2
Liabilities and Stockholders' Equity:
Current liabilities				1,630.3	1,535.0
Long-term debt				1,260.7	1,310.2
Operating lease obligations	$ 171.0			0.0
Other liabilities				199.6	193.8
Stockholders' equity				1,567.9	1,695.2
Total liabilities and stockholders’ equity				$ 4,658.5	$ 4,905.2