Business and Summary of Significant Accounting Policies Revenue Recognition (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015
Deferred Revenue [Line Items]
Deferred Revenue	$ 33.6	$ 9.4
Deferred Costs	$ 21.6	5.9
Product's Estimate Useful Life [Member]
Deferred Revenue [Line Items]
Product's Estimated Life	5 years
Other Current Assets [Member]
Deferred Revenue [Line Items]
Deferred Costs, Current	$ 5.0	1.2
Other Noncurrent Assets [Member]
Deferred Revenue [Line Items]
Deferred Costs, Noncurrent	16.6	4.7
Other Current Liabilities [Member]
Deferred Revenue [Line Items]
Deferred Revenue, Current	7.7	2.0
Other Noncurrent Liabilities [Member]
Deferred Revenue [Line Items]
Deferred Revenue, Noncurrent	$ 25.9	$ 7.4