Segment and Geographic Information - Geographic Sales & PP&E (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues From External Customers And Long Lived Assets [Line Items]
Sales		$ 7,633,870	$ 6,953,740	$ 6,465,346	$ 5,759,552	$ 6,442,891	$ 5,936,092	$ 5,972,101	$ 5,474,177	$ 26,812,508	$ 23,825,261	$ 23,282,020
Operating income (loss):
Operating Income (Loss)		$ 270,914	$ 235,992	$ 229,822	$ 191,722	$ 254,899	$ 198,684	$ 223,592	$ 181,364	928,450	858,539	824,482
Americas [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales	[1]									12,408,383	11,442,690	11,721,528
EMEA [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										7,673,348	6,772,685	6,788,738
Asia/Pacific [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										6,730,777	5,609,886	4,771,754
Global components [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										18,330,456	15,408,839	14,405,793
Operating income (loss):
Operating Income (Loss)										801,027	686,466	649,396
Global ECS [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales										8,482,052	8,416,422	8,876,227
Operating income (loss):
Operating Income (Loss)										445,081	441,803	424,063
Corporate Segment [Member]
Operating income (loss):
Operating Income (Loss)	[2]									$ (317,658)	$ (269,730)	$ (248,977)

[1] Includes sales related to the United States of $11,321,917, $10,501,131, and $10,761,932 in 2017, 2016, and 2015, respectively.

[2] Includes restructuring, integration, and other charges of $91,294, $73,602, and $68,765 in 2017, 2016, and 2015, respectively, as well as an impairment on assets held for sale of $21,000 in 2017.