Segment and Geographic Information - Geographic Sales & Long-lived assets (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2020	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 31, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Revenues From External Customers And Long Lived Assets [Line Items]
Sales		$ 8,454,192	$ 7,231,260	$ 6,606,494	$ 6,381,417	$ 7,338,190	$ 7,078,118	$ 7,344,548	$ 7,155,991	$ 28,673,363	[1]	$ 28,916,847	[1]	$ 29,676,768	[1]
Long-Lived Assets		1,105,714				1,081,063				1,105,714		1,081,063
Americas [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Long-Lived Assets	[2]	652,006				713,925				652,006		713,925
EMEA [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Long-Lived Assets		339,652				274,656				339,652		274,656
Asia-Pacific [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Long-Lived Assets		114,056				92,482				114,056		92,482
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										10,162,989		11,511,611		12,157,306
Long-Lived Assets		$ 645,807				$ 709,056				645,807		709,056
Global components [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										20,502,687		20,250,735		20,856,851
Global components [Member] | Americas [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										6,183,119		7,167,295		7,816,533
Global components [Member] | EMEA [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										4,987,534		5,412,379		5,733,222
Global components [Member] | Asia-Pacific [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										9,332,034		7,671,061		7,307,096
Global ECS [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										8,170,676		8,666,112		8,819,917
Global ECS [Member] | Americas [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										5,109,372		5,632,025		5,742,526
Global ECS [Member] | EMEA [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										$ 3,061,304		$ 3,034,087		$ 3,077,391

[1] Includes sales related to the United States of $10,162,989, $11,511,611, and $12,157,306 for 2020, 2019, and 2018, respectively.

[2] Includes net long-lived assets related to the United States of $645,807 and $709,056 at December 31, 2020 and 2019, respectively.