Property and Equipment Schedule of Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Jan. 03, 2015	Dec. 28, 2013
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,864,770	$ 1,611,231
Less accumulated depreciation and leasehold amortization	940,510	818,450
Total property and equipment, net	924,260	792,781
Computer and communications equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,137,497	963,301
Land, buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	439,567	411,382
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	187,351	160,030
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	96,244	72,601
Capital lease equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,196	3,207
Other equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 915	$ 710