Acquisitions (Details) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 26, 2015 USD ($) $ / shares	Sep. 27, 2014 USD ($) $ / shares	Sep. 26, 2015 USD ($) Acquisitions $ / shares	Sep. 27, 2014 USD ($) $ / shares	Dec. 31, 2014 USD ($) Acquisitions
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired				$ 512,910	$ 129,522
Goodwill	[1]	$ 2,366,968		2,366,968		$ 2,069,209
Sales		5,698,304	$ 5,613,216	16,530,678	16,371,795
Business Acquisition, Pro Forma Revenue		5,703,717	6,066,812	16,899,811	17,584,040
Net income attributable to shareholders		109,244	146,864	339,234	381,868
Business Acquisition, Pro Forma Net Income (Loss)		$ 109,245	$ 161,142	$ 343,409	$ 410,736
Basic | $ / shares		$ 1.16	$ 1.49	$ 3.56	$ 3.84
Business Acquisition, Pro Forma Earnings Per Share, Basic | $ / shares		1.16	1.63	3.60	4.13
Diluted | $ / shares	[2]	1.15	1.47	3.52	3.80
Business Acquisition, Pro Forma Earnings Per Share, Diluted | $ / shares		$ 1.15	$ 1.61	$ 3.57	$ 4.08
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		$ 280,454
Cash Acquired from Acquisition		28,205
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables		145,130		$ 145,130
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other		26,647		26,647
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		167,774		167,774
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		(11,736)		(11,736)
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		252,249		252,249
Sales		230,514
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%
Data Modul AG NCI [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		2.30%		2.30%
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Number of Businesses Acquired | Acquisitions				6		5
Payments to Acquire Businesses, Net of Cash Acquired				$ 260,661		$ 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 759 and 656 shares for the third quarter and first nine months of 2015 and 317 and 271 shares for the third quarter and first nine months of 2014, respectively, were excluded from the computation of net income per share on a diluted basis as their effect was anti-dilutive.