Impact of the COVID-19 Pandemic - Additional Information (Details) - Covid 19 $ in Millions	3 Months Ended
Apr. 30, 2020 USD ($)
Unusual Or Infrequent Item [Line Items]
Impairment charges related to goodwill	$ 133.7
Impairment charges related to intangible assets	$ 22.2

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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