Financial Instruments Measured at Fair Value - Derivatives (Details) (USD $) In Thousands, unless otherwise specified									9 Months Ended		3 Months Ended				9 Months Ended				3 Months Ended		9 Months Ended	3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended						3 Months Ended				9 Months Ended												3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended
	Sep. 27, 2014	Dec. 31, 2013	Sep. 27, 2014 Senior Debentures Due in 2018 [Member]	Sep. 28, 2013 Senior Notes Due in 2013 [Member]	Sep. 27, 2014 Notes Due in 2018 [Member]	Sep. 27, 2014 Notes Due in 2020 [Member]	Sep. 27, 2014 Interest rate swaps designated as fair value hedges [Member] Senior Debentures Due in 2018 [Member]	Sep. 27, 2014 Interest rate swaps designated as fair value hedges [Member] Notes Due in 2020 [Member]	Sep. 27, 2014 Interst Rate Swaps Converting Senior Notes Due in 2013 [Member]	Dec. 31, 2011 Interst Rate Swaps Converting Senior Notes Due in 2013 [Member]	Sep. 27, 2014 Foreign Exchange Contract [Member]		Sep. 28, 2013 Foreign Exchange Contract [Member]		Sep. 27, 2014 Foreign Exchange Contract [Member]		Sep. 28, 2013 Foreign Exchange Contract [Member]		Sep. 27, 2014 Interest Rate Swaps Converting Senior Notes Due in 2013 [Member]	Sep. 28, 2013 Interest Rate Swaps Converting Senior Notes Due in 2013 [Member]	Sep. 28, 2013 Interest Rate Swaps Converting Senior Notes Due in 2013 [Member]	Sep. 27, 2014 Fair Value Hedging [Member] Interest Rate Swap [Member]		Sep. 28, 2013 Fair Value Hedging [Member] Interest Rate Swap [Member]		Sep. 27, 2014 Fair Value Hedging [Member] Interest Rate Swap [Member]		Sep. 28, 2013 Fair Value Hedging [Member] Interest Rate Swap [Member]		Sep. 27, 2014 Fair Value Measurement [Domain] Interest Rate Swap [Member]		Sep. 28, 2013 Fair Value Measurement [Domain] Interest Rate Swap [Member]		Sep. 27, 2014 Fair Value Measurement [Domain] Interest Rate Swap [Member]		Sep. 28, 2013 Fair Value Measurement [Domain] Interest Rate Swap [Member]		Sep. 27, 2014 Not Designated as Hedging Instrument [Member]	Dec. 31, 2013 Not Designated as Hedging Instrument [Member]	Sep. 27, 2014 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 28, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 27, 2014 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 28, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 27, 2014 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Other Current Assets [Member]	Dec. 31, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Other Current Assets [Member]	Sep. 27, 2014 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Accrued Liabilities [Member]	Dec. 31, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Accrued Liabilities [Member]	Sep. 27, 2014 Designated as Hedging Instrument [Member]	Dec. 31, 2013 Designated as Hedging Instrument [Member]	Sep. 27, 2014 Interest rate swaps designated as fair value hedges [Member] Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Other Liabilities [Member]	Dec. 31, 2013 Interest rate swaps designated as fair value hedges [Member] Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Other Liabilities [Member]	Sep. 27, 2014 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Interest Rate Swap [Member]		Sep. 28, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Interest Rate Swap [Member]		Sep. 27, 2014 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Interest Rate Swap [Member]		Sep. 28, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Interest Rate Swap [Member]		Sep. 27, 2014 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 28, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 27, 2014 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 28, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member]		Sep. 27, 2014 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Other Current Assets [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Other Current Assets [Member]	Sep. 27, 2014 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Accrued Liabilities [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] Accrued Liabilities [Member]	Sep. 27, 2014 2014 Acquisitions [Member]	Sep. 27, 2014 2013 Acquisition [Member]	Sep. 27, 2014 2013 Acquisition [Member]	Sep. 27, 2014 Contingent Consideration [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2013 Contingent Consideration [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	$ 365,568	$ 445,684					$ 50,000	$ 50,000		$ 175,000
Derivative, Fair Value, Net	(348)	(654)					(289)	(290)																														(3)	(819)									3,047	1,275	(3,050)	(2,094)	(345)	165	(579)	0																	850	368	(616)	(203)
Debt Instrument, Interest Rate, Stated Percentage			6.875%	6.875%	3.00%	6.00%				2.63%
Debt Instrument, Interest Rate, Effective Percentage							5.50%	4.20%
Cash Paid for Termination of Net Investment Hedges																					7,700
Derivative Instrument Gain Loss Reclassified Into Income, Net									(489)										(165)	(157)	(87)
Derivative Instruments, Gain (Loss) Recognized in Income, Net											(376)	[1]	51	[1]	(148)	[1]	(889)	[1]				0	[2]	0	[2]	0	[2]	0	[2]	0	[2]	0	[2]	0	[2]	0	[2]			(376)	[1]	51	[1]	(148)	[1]	(889)	[1]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income, Effective Portion, Net																																																								0	[3]	0	[3]	0	[3]	3,132	[3]	438	[4]	(253)	[4]	48	[4]	(753)	[4]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net																																																								(165)	[3]	(157)	[3]	(489)	[3]	(379)	[3]	(185)	[4]	(48)	[4]	(118)	[4]	432	[4]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net																																																								0	[3]	0	[3]	0	[3]	292	[3]	0	[4]	0	[4]	0	[4]	0	[4]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value																																																																															10,779	5,845
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High																																																																												9,000	6,000	23,400
Fair Value Measurement Contingent Consideration-Current																																																																															7,729	2,123
Fair Value Measurement Contingent Consideration Non-Current																																																																															$ 3,050	$ 3,722

[1] The amount of gain (loss) recognized in income on derivatives is recorded in "Cost of sales" in the company's consolidated statements of operations.

[2] The amount of gain (loss) recognized in income on derivatives is recorded in "Interest and other financing expense, net" in the company's consolidated statements of operations.

[3] Both the effective and ineffective portions of any gain (loss) reclassified or recognized in income are recorded in "Interest and other financing expense, net" in the company's consolidated statements of operations.

[4] Both the effective and ineffective portions of any gain (loss) reclassified or recognized in income are recorded in "Cost of sales" in the company's consolidated statements of operations.