Selected Quarterly Financial Data (Unaudited) - Footnote Disclosure (Details) $ / shares in Units, $ in Millions |
3 Months Ended |
---|---|
Apr. 30, 2020
USD ($)
$ / shares
| |
Quarterly Financial Information Disclosure [Abstract] | |
Goodwill and intangible asset impairment | $ 172.8 |
Goodwill and intangible asset impairment, after tax | $ 170.6 |
Goodwill and intangible asset impairment (usd per share) | $ / shares | $ 2.54 |