Segment and Geographic Information (Details) - USD ($) $ in Thousands		3 Months Ended							9 Months Ended				12 Months Ended
		Sep. 29, 2018		Dec. 31, 2017	Sep. 30, 2017		Jul. 01, 2017	Apr. 01, 2017	Sep. 29, 2018		Sep. 30, 2017		Dec. 31, 2017
Sales:
Sales		$ 7,490,445	[1]	$ 7,539,449	$ 6,856,108	[1]	$ 6,422,226	$ 5,736,780	$ 21,758,586	[1]	$ 19,015,114	[1]	$ 26,554,563
Operating income (loss):
Operating income		290,310		286,824	235,441		$ 230,446	$ 193,025	813,132		658,912		945,736
Restructuring, integration, and other charges		10,143			15,896				50,497		55,817
Loss on disposition of businesses, net		2,042			0				3,604		0
Assets		16,978,025		16,459,267					16,978,025				16,459,267
Global Components [Member]
Sales:
Sales		5,381,078			4,864,361				15,595,374		13,385,514
Operating income (loss):
Operating income		271,939			212,993				755,325		583,690
Assets		11,819,260		10,229,168					11,819,260				10,229,168
Global ECS [Member]
Sales:
Sales		2,109,367			1,991,747				6,163,212		5,629,600
Operating income (loss):
Operating income		82,187			94,005				275,410		282,955
Assets		4,547,338		5,426,675					4,547,338				5,426,675
Corporate Segment [Member]
Operating income (loss):
Operating income	[2]	(63,816)			$ (71,557)				(217,603)		$ (207,733)
Assets		$ 611,427		$ 803,424					$ 611,427				$ 803,424

[1] Includes sales related to the United States of $3,181,227 and $8,799,364 for the third quarter and first nine months of 2018 and $2,853,505 and $7,863,591 for the third quarter and first nine months of 2017, respectively.

[2] Includes restructuring, integration, and other charges of $10,143 and $50,497 for the third quarter and first nine months of 2018 and $15,896 and $55,817 for the third quarter and first nine months of 2017, respectively. Also included in the third quarter and first nine months of 2018 was a net loss on the disposition of businesses of $2,042 and $3,604, respectively.