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Summary of Significant Accounting Policies and Related Information - Inventory and Licenses (Details)
$ in Millions
12 Months Ended
Feb. 29, 2020
USD ($)
item
Feb. 28, 2019
USD ($)
Feb. 28, 2018
USD ($)
Summary of significant accounting policies      
General and administrative expenses charged to inventory $ 44.6 $ 47.7 $ 43.2
General and administrative expenses directly attributable to the procurement of inventory included in inventory balances $ 16.0 $ 15.6  
Number of licensors exceeding 10 percent of net sales revenue | item 3    
Cost of goods sold manufactured by vendors | Supplier concentration risk | Vendors in Far East      
Summary of significant accounting policies      
Concentration risk percentage 76.00% 74.00% 74.00%
Cost of goods sold manufactured by vendors | Supplier concentration risk | Top vendor      
Summary of significant accounting policies      
Concentration risk percentage 9.00% 11.00% 11.00%
Cost of goods sold manufactured by vendors | Supplier concentration risk | Top two manufacturers      
Summary of significant accounting policies      
Concentration risk percentage 18.00% 20.00% 19.00%
Cost of goods sold manufactured by vendors | Supplier concentration risk | Top five suppliers      
Summary of significant accounting policies      
Concentration risk percentage 39.00% 38.00% 34.00%
Net sales revenue | Net sales revenue subject to trademark license agreements      
Summary of significant accounting policies      
Concentration risk percentage 43.00% 41.00% 45.00%
Net sales revenue | Net sales revenue subject to trademark license agreements | Top Licensor      
Summary of significant accounting policies      
Concentration risk percentage 14.00% 11.00% 10.00%