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Summary of Significant Accounting Policies and Related Information - Inventory and Licenses (Details) $ in Millions | 12 Months Ended
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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%

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