Basis of Presentation, Nature of Operations and Summary of Significant Accounting Policies Revenue Classification (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
System Sales
Classification Allocations for Single Unit Accounting Arrangements [Line Items]
Revenue Under Single Unit Accounting Arrangements	$ 17.7	$ 23.3	$ 17.5
Support, Maintenance and Services
Classification Allocations for Single Unit Accounting Arrangements [Line Items]
Revenue Under Single Unit Accounting Arrangements	$ 140.7	$ 97.5	$ 88.1