Leases - Other information (Details) - USD ($) $ in Millions	6 Months Ended
Jul. 31, 2022	Jul. 31, 2021
Leases [Abstract]
Operating lease, lease not yet commenced, description	As of July 31, 2022, there are no material leases that are legally binding but have not yet commenced.
Weighted average remaining lease term	5 years 6 months
Weighted average discount rate	8.50%
Cash paid for amounts included in the measurement of operating lease liabilities	$ 30.0	$ 29.4
Right-of-use assets obtained in exchange for lease obligations	$ 69.9	$ 8.6

No definition available.

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- Definition

Description of lessor's operating lease that has not yet commenced.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=124258985&loc=SL77919359-209981

+ Details

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- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

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- Definition

Weighted average discount rate for operating lease calculated at point in time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
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- Definition

Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

+ References

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