Summary of Significant Accounting Policies (Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 24, 2012	Jun. 30, 2013		Jun. 24, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of revenues - foreign currency revenue forecast contracts	$ 102,399	$ 107,080	$ 197,293		$ 198,253
Total before tax	1,314	(91,829)	(2,472)		(102,731)
Tax benefit	(784)	(5,624)	(1,063)		4,572
Other operating income	248	0	578		0
Reclassification Out Of Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net of tax			(522)
Reclassification Out Of Accumulated Other Comprehensive Income (Loss) [Member] | Amortization of Pension Plan Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Actuarial loss			(775)	[1]
Prior service cost			(1)
Total before tax			(776)
Tax benefit			221
Net of tax			(555)
Reclassification Out Of Accumulated Other Comprehensive Income (Loss) [Member] | Gains and Losses on Cash flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cost of revenues - foreign currency revenue forecast contracts			153
Total before tax			153
Tax benefit			0
Net of tax			153
Reclassification Out Of Accumulated Other Comprehensive Income (Loss) [Member] | Non-Controlling Interests [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total before tax			(120)
Tax benefit			0
Net of tax			(120)
Other operating income			$ (120)

[1] These accumulated other comprehensive income components are included in the computation of net periodic pension costs. Refer to Note 9 of the Consolidated Financial Statements.