Acquisitions (Details) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 27, 2015 USD ($) $ / shares	Jun. 28, 2014 USD ($) $ / shares	Jun. 27, 2015 USD ($) Acquisitions $ / shares	Jun. 28, 2014 USD ($) $ / shares	Dec. 31, 2014 USD ($) Acquisitions
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired				$ 470,674	$ 60,224
Goodwill	[1]	$ 2,341,472		2,341,472		$ 2,069,209
Sales		5,829,989	$ 5,676,539	10,832,374	10,758,579
Business Acquisition, Pro Forma Revenue		5,877,711	6,003,830	11,172,766	11,383,075
Net income attributable to shareholders		123,932	127,884	229,990	235,004
Business Acquisition, Pro Forma Net Income (Loss)		$ 124,192	$ 133,351	$ 234,151	$ 242,682
Basic | $ / shares		$ 1.30	$ 1.29	$ 2.40	$ 2.36
Business Acquisition, Pro Forma Earnings Per Share, Basic | $ / shares		1.30	1.34	2.44	2.43
Diluted | $ / shares	[2]	1.28	1.27	2.37	2.33
Business Acquisition, Pro Forma Earnings Per Share, Diluted | $ / shares		$ 1.28	$ 1.33	$ 2.42	$ 2.40
Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years				10 years
immixGroup [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross		$ 279,271
Cash Acquired from Acquisition		32,566
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables		157,130		$ 157,130
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other		34,269		34,269
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		1,569		1,569
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets		5,313		5,313
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		60,000		60,000
Goodwill		154,591		154,591
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable		(136,921)		(136,921)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities		(23,719)		(23,719)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other		(5,527)		(5,527)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		246,705		246,705
Sales		96,524
immixGroup [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Customer Relationships, Gross		$ 60,000		$ 60,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				8 years
Data Modul AG [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		53.70%		53.70%
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Number of Businesses Acquired | Acquisitions				5		5
Payments to Acquire Businesses, Net of Cash Acquired				$ 223,969		$ 162,881
Debt acquired from acquisition				$ 84,487
Business Combination, Contingent Consideration, Liability						5,853
Business Combination, Other Amounts Withheld						$ 210

[1] The total carrying value of cost in excess of net assets of companies acquired for all periods in the table above is reflected net of $1,018,780 of accumulated impairment charges, of which $716,925 was recorded in the global components business segment and $301,855 was recorded in the global ECS business segment.

[2] Stock-based compensation awards for the issuance of 709 and 607 shares for the second quarter and first six months of 2015 and 316 and 241 shares for the second quarter and first six months of 2014, respectively, were excluded from the computation of net income per share on a diluted basis as their effect was anti-dilutive.