Property and Equipment Schedule of Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,611,231	$ 1,312,605
Less accumulated depreciation and leasehold amortization	818,450	742,897
Total property and equipment, net	792,781	569,708
Computer and communications equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	963,301	817,186
Land, buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	411,382	281,798
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	160,030	146,004
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	72,601	63,848
Capital lease equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,207	3,194
Other equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 710	$ 575