INCOME TAXES - SCHEDULE OF DEFERRED TAX ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets, Net [Abstract]
Accounts receivable	$ 17,560	$ 3,382
Deferred Tax Assets, Inventory	14,793
Deferred Tax Assets, Property, Plant and Equipment	134,377	61,326
Employee benefits	53,040	20,641
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	14,061	13,792
Tax loss carryforwards	36,923	10,486
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	55,637	1,247
Other	27,643	6,791
Deferred taxes, Assets	293,405	111,811
Deferred Tax Liabilities [Abstract]
Deferred Tax Liabilities, Inventory		4,580
Depreciation	60,687	18,393
Deferred Tax Liabilities, Leasing Arrangements	136,477	60,670
Amortization of intangible assets	540,520	159,573
Other	6,286	3,964
Deferred Tax Assets, Gross	354,034	117,665
Deferred Tax Assets, Valuation Allowance	(60,629)	(5,854)
Deferred Tax Liabilities, Gross	743,970	$ 247,180
Anixter International [Member]
Deferred Tax Liabilities [Abstract]
Amortization of intangible assets	$ 347,300