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Goodwill & Other Intangible Assets Intangible Assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Feb. 23, 2018
Feb. 24, 2017
Feb. 26, 2016
Schedule Of Intangible Assets By Major ClassLine Items [Line Items]      
Intangible assets amortization expense $ 1.3 $ 1.0 $ 1.8
Finite-lived intangible assets, gross 77.4 47.2  
Finite-lived intangible assets, accumulated amortization 44.6 43.2  
Finite-lived intangible assets, net 32.8 4.0  
Indefinite-lived intangible assets, gross 12.8 12.8  
Indefinite-lived intangible assets, accumulated amortization 0.0 0.0  
Indefinite-lived intangible assets, net 12.8 12.8  
Other intangible assets, gross 90.2 60.0  
Other intangible assets, net 45.6 16.8  
Estimated Amortization Expense, Fiscal Year Maturity [Abstract]      
Amortization expense, 2019 3.6    
Amortization expense, 2020 3.4    
Amortization expense, 2021 3.4    
Amortization expense, 2022 3.4    
Amortization expense, 2023 3.3    
Amortization Expense, 2019-2023 Total $ 17.1    
Patented Technology [Member]      
Schedule Of Intangible Assets By Major ClassLine Items [Line Items]      
Weighted average useful life 8 years 3 months    
Finite-lived intangible assets, gross $ 26.8 26.8  
Finite-lived intangible assets, accumulated amortization 23.4 23.0  
Finite-lived intangible assets, net $ 3.4 3.8  
Non-compete agreements [Member]      
Schedule Of Intangible Assets By Major ClassLine Items [Line Items]      
Weighted average useful life 6 years 2 months    
Finite-lived intangible assets, gross $ 1.2 1.6  
Finite-lived intangible assets, accumulated amortization 1.2 1.6  
Finite-lived intangible assets, net $ 0.0 0.0  
Trademarks [Member]      
Schedule Of Intangible Assets By Major ClassLine Items [Line Items]      
Weighted average useful life 9 years 11 months    
Finite-lived intangible assets, gross $ 11.2 [1] 9.0  
Finite-lived intangible assets, accumulated amortization 9.9 [1] 9.0  
Finite-lived intangible assets, net $ 1.3 [1] 0.0  
Dealer relationships [Member]      
Schedule Of Intangible Assets By Major ClassLine Items [Line Items]      
Weighted average useful life 11 years    
Finite-lived intangible assets, gross $ 25.5 [1] 0.0  
Finite-lived intangible assets, accumulated amortization 0.4 [1] 0.0  
Finite-lived intangible assets, net $ 25.1 [1] 0.0  
Other Intangible Assets [Member]      
Schedule Of Intangible Assets By Major ClassLine Items [Line Items]      
Weighted average useful life 5 years    
Finite-lived intangible assets, gross $ 12.7 [1] 9.8  
Finite-lived intangible assets, accumulated amortization 9.7 [1] 9.6  
Finite-lived intangible assets, net 3.0 [1] 0.2  
Other category [Member]      
Schedule Of Intangible Assets By Major ClassLine Items [Line Items]      
Intangible asset impairment charges $ 0.0 $ 0.0  
[1] (1)In 2018, we acquired AMQ Solutions and certain assets of Tricom Vision Limited resulting in additional intangible assets in the Americas segment. See Note 18 for additional information.