Segment and Geographic Information (Details) - USD ($) $ in Thousands		3 Months Ended							6 Months Ended				12 Months Ended
		Jun. 30, 2018		Dec. 31, 2017	Sep. 30, 2017	Jul. 01, 2017		Apr. 01, 2017	Jun. 30, 2018		Jul. 01, 2017		Dec. 31, 2017
Sales:
Sales		$ 7,392,528	[1]	$ 7,539,449	$ 6,856,108	$ 6,422,226	[1]	$ 5,736,780	$ 14,268,141	[1]	$ 12,159,006	[1]	$ 26,554,563
Operating income (loss):
Operating income		286,827		286,824	$ 235,441	230,446		$ 193,025	522,822		423,471		945,736
Restructuring, integration, and other charges		19,183				24,416			40,354		39,921
Loss on disposition of businesses, net		0				0			1,562		0
Assets		16,748,808		16,459,267					16,748,808				16,459,267
Global Components [Member]
Sales:
Sales		5,284,364				4,462,350			10,214,296		8,521,153
Operating income (loss):
Operating income		253,840				197,164			483,386		370,697
Assets		11,630,360		10,229,168					11,630,360				10,229,168
Global ECS [Member]
Sales:
Sales		2,108,164				1,959,876			4,053,845		3,637,853
Operating income (loss):
Operating income		109,417				106,761			193,223		188,950
Assets		4,491,916		5,426,675					4,491,916				5,426,675
Corporate Segment [Member]
Operating income (loss):
Operating income	[2]	(76,430)				$ (73,479)			(153,787)		$ (136,176)
Assets		$ 626,532		$ 803,424					$ 626,532				$ 803,424

[1] Includes sales related to the United States of $2,968,469 and $5,618,137 for the second quarter and first six months of 2018 and $2,667,958 and $5,010,086 for the second quarter and first six months of 2017, respectively.

[2] Includes restructuring, integration, and other charges of $19,183 and $40,354 for the second quarter and first six months of 2018 and $24,416 and $39,921 for the second quarter and first six months of 2017, respectively, as well as a net loss on the disposition of businesses of $1,562 for the first six months of 2018