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Fair Value Measurements and Financial Instruments - Gains and Losses on Derivative Instruments and Foreign Currency Transaction (Detail) - Selling, General and Administrative Expense - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 31, 2020
Nov. 02, 2019
Oct. 31, 2020
Nov. 02, 2019
Fair Value Derivative Contract Assets and Liabilities Measured On Recurring Basis Gain Loss Included In Earnings [Line Items]        
Gains (losses) on the changes in fair value of derivative instruments $ 0.6 $ 0.4 $ (4.6) $ 3.2
(Losses) gains on the re-measurement of related intercompany loans and third-party accounts payable denominated in foreign currencies (0.5) 0.1 4.7 (2.7)
Net gains $ 0.1 $ 0.5 $ 0.1 $ 0.5