Segment and Geographic Information - Geographic Sales & PP&E (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Revenues From External Customers And Long Lived Assets [Line Items]
Sales		$ 7,338,190	$ 7,078,118	$ 7,344,548	$ 7,155,991	$ 7,918,182	$ 7,490,445	$ 7,392,528	$ 6,875,613	$ 28,916,847	[1]	$ 29,676,768	[1]	$ 26,554,563	[1]
Property, Plant and Equipment, Net		803,110				824,700				803,110		824,700
Americas [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Property, Plant and Equipment, Net	[2]	594,357				673,228				594,357		673,228
EMEA [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Property, Plant and Equipment, Net		157,550				110,996				157,550		110,996
Asia-Pacific [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Property, Plant and Equipment, Net		51,203				40,476				51,203		40,476
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										11,511,611		12,157,306		11,038,930
Property, Plant and Equipment, Net		$ 591,818				$ 670,201				591,818		670,201
Global components [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										20,250,735		20,856,851		18,330,456
Global components [Member] | Americas [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										7,167,295		7,816,533		7,010,385
Global components [Member] | EMEA [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales	[3]									5,412,379		5,733,222		4,868,862
Global components [Member] | Asia-Pacific [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										7,671,061		7,307,096		6,451,209
Global ECS [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										8,666,112		8,819,917		8,224,107
Global ECS [Member] | Americas [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										5,632,025		5,742,526		5,388,888
Global ECS [Member] | EMEA [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales	[3]									$ 3,034,087		$ 3,077,391		$ 2,835,219

[1] Includes sales related to the United States of $11,511,611, $12,157,306, and $11,038,930 for 2019, 2018, and 2017, respectively.

[2] Includes net property, plant, and equipment related to the United States of $591,818 and $670,201 at December 31, 2019 and 2018, respectively.

[3] Defined as Europe, the Middle East, and Africa.