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Business and Summary of Significant Accounting Policies Revenue Recognition (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Jan. 03, 2015
Deferred Revenue [Line Items]  
Deferred Revenue 9.4us-gaap_DeferredRevenue
Deferred Costs 5.9us-gaap_DeferredCostsCurrentAndNoncurrent
Nonsoftware Service, Support and Maintenance Arrangement [Member]  
Deferred Revenue [Line Items]  
Product's Estimated Life 5 years
Other Current Assets [Member]  
Deferred Revenue [Line Items]  
Deferred Costs, Current 1.2us-gaap_DeferredCostsCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
Other Noncurrent Assets [Member]  
Deferred Revenue [Line Items]  
Deferred Costs, Noncurrent 4.7us-gaap_DeferredCosts
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentAssetsMember
Other Current Liabilities [Member]  
Deferred Revenue [Line Items]  
Deferred Revenue, Current 2.0us-gaap_DeferredRevenueCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember
Other Noncurrent Liabilities [Member]  
Deferred Revenue [Line Items]  
Deferred Revenue, Noncurrent 7.4us-gaap_DeferredRevenueNoncurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentLiabilitiesMember