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Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) Rollforward (Details) - USD ($)
$ in Millions
12 Months Ended
Feb. 24, 2017
Feb. 26, 2016
Feb. 27, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss) $ (39.6) $ (29.4)  
Other comprehensive income (loss) before reclassifications (6.1) (5.0)  
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax (4.9) (5.2)  
Total other comprehensive income (loss), net (11.0) (10.2) $ (30.2)
Accumulated other comprehensive income (loss) (50.6) (39.6) (29.4)
Unrealized gain on investments [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss) 0.6 0.8  
Other comprehensive income (loss) before reclassifications (0.5) 0.0  
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax (0.4) (0.2)  
Total other comprehensive income (loss), net (0.9) (0.2)  
Accumulated other comprehensive income (loss) (0.3) 0.6 0.8
Minimum pension liability [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss) 10.7 8.5  
Other comprehensive income (loss) before reclassifications 6.8 7.2  
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax (4.5) (5.0)  
Total other comprehensive income (loss), net 2.3 2.2  
Accumulated other comprehensive income (loss) 13.0 10.7 8.5
Foreign currency translation adjustments [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Accumulated other comprehensive income (loss) (50.9) (38.7)  
Other comprehensive income (loss) before reclassifications   (12.2)  
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 0.0 0.0  
Total other comprehensive income (loss), net (12.4) (12.2)  
Accumulated other comprehensive income (loss) $ (63.3) $ (50.9) $ (38.7)