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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parentheticals) - USD ($) $ in Millions | 12 Months Ended
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Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018
Statement of Comprehensive Income [Abstract] |  |  |
Net (loss) gain on derivative instruments, tax | $ (1.1) |  |
Net (loss) gain on derivative instruments, tax |  | $ (1.1) | $ 3.2
Change in net unrealized gain (loss) on available-for-sale securities, tax | (0.4) | 0.0 | 0.1
Change in defined pension items, tax | 1.6 | (2.0) | (0.7)
Net change in cumulative foreign currency translation (loss) gain, tax | $ 0.1 | $ 0.5 | $ (4.8)

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