Business and Summary of Significant Accounting Policies Revenue Recognition (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016
Deferred Revenue [Line Items]
Deferred Revenue	$ 61.3	$ 33.6
Deferred Costs	$ 33.2	21.6
Product's Estimate Useful Life [Member]
Deferred Revenue [Line Items]
Product's Estimated Life	4 years
Other Current Assets [Member]
Deferred Revenue [Line Items]
Deferred Costs, Current	$ 11.6	5.0
Other Noncurrent Assets [Member]
Deferred Revenue [Line Items]
Deferred Costs, Noncurrent	21.6	16.6
Other Current Liabilities [Member]
Deferred Revenue [Line Items]
Deferred Revenue, Current	21.0	7.7
Other Noncurrent Liabilities [Member]
Deferred Revenue [Line Items]
Deferred Revenue, Noncurrent	$ 40.3	$ 25.9