Acquisitions (Details) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Oct. 01, 2016 USD ($) $ / shares	Sep. 26, 2015 USD ($) $ / shares	Oct. 01, 2016 USD ($) Acquisitions $ / shares	Sep. 26, 2015 USD ($) $ / shares	Dec. 31, 2015 USD ($) Acquisitions
Business Acquisition [Line Items]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual				$ 529,935	$ 230,514
Payments to Acquire Businesses, Net of Cash Acquired				68,946	512,910
Goodwill	[1]	$ 2,441,846		2,441,846		$ 2,368,832
Sales		5,936,092	$ 5,698,304	17,382,370	16,530,678
Business Acquisition, Pro Forma Revenue			5,704,129		16,933,261
Net income attributable to shareholders		$ 117,727	109,244	$ 358,232	339,234
Business Acquisition, Pro Forma Net Income (Loss)			$ 109,187		$ 341,905
Basic | $ / shares		$ 1.29	$ 1.16	$ 3.92	$ 3.56
Business Acquisition, Pro Forma Earnings Per Share, Basic | $ / shares			1.16		3.59
Diluted | $ / shares	[2]	$ 1.28	1.15	$ 3.87	3.52
Business Acquisition, Pro Forma Earnings Per Share, Diluted | $ / shares			$ 1.14		$ 3.55
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
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other						24,181
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment						1,569
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets						5,313
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill						46,400
Goodwill						183,840
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable						(136,921)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities						(11,736)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other						(5,527)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net						252,249
immixGroup [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Customer Relationships, Gross						$ 44,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life						13 years
immixGroup [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life						5 years
Finite-Lived Trade Names, Gross						$ 2,400
Data Modul AG [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired						53.70%
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent						3.60%
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Number of Businesses Acquired | Acquisitions				3		9
Payments to Acquire Businesses, Net of Cash Acquired				$ 68,064		$ 263,341
Debt acquired from acquisition						$ 84,487

[1] The total carrying value of goodwill 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 824 and 821 shares for the third quarter and first nine months of 2016 and 759 and 656 shares for the third quarter and first nine months of 2015, respectively, were excluded from the computation of net income per share on a diluted basis as their effect was anti-dilutive.