Realignment and reorganization costs G&A Realignment Costs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2015		Mar. 30, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 4,613		$ 14,711	[1]
General and Administrative Realignment and Reinvestment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	2,484
Restructuring and Related Cost, Cost Incurred to Date	14,698
Restructuring Charges	4,163		0
Restructuring Charges, Incurred to Date	17,089
Severance and related employee costs [Member] | General and Administrative Realignment and Reinvestment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	700
Restructuring and Related Cost, Incurred Cost	1,982
Restructuring and Related Cost, Cost Incurred to Date	13,899
Recruitment and relocation costs [Member] | General and Administrative Realignment and Reinvestment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	4,000
Restructuring and Related Cost, Incurred Cost	470
Restructuring and Related Cost, Cost Incurred to Date	679
Other [Member] | General and Administrative Realignment and Reinvestment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	32
Restructuring and Related Cost, Cost Incurred to Date	120
Share Based Compensation Expense [Member] | General and Administrative Realignment and Reinvestment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	1,679	[2]
Restructuring Charges, Incurred to Date	2,391	[2]
Minimum [Member] | General and Administrative Realignment and Reinvestment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	8,000
Minimum [Member] | Share Based Compensation Expense [Member] | General and Administrative Realignment and Reinvestment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	3,300
Maximum [Member] | General and Administrative Realignment and Reinvestment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	9,500
Maximum [Member] | Share Based Compensation Expense [Member] | General and Administrative Realignment and Reinvestment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	$ 4,800

[1] Previously titled “Facilities action (income) charges, net.”

[2] Represents incremental share-based compensation resulting from the modification of stock options and performance-based awards in connection with the termination of employees under our G&A realignment plan.