The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

Name:	us-gaap_LossContingencyLossInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Commitments and Contingencies (Details) $ in Millions					6 Months Ended
Commitments and Contingencies (Details) $ in Millions	Jul. 31, 2021 USD ($)	Jul. 30, 2020 officer	Jun. 11, 2020 officer	Apr. 08, 2020 officer	Jul. 31, 2021 USD ($)
Violation Of Securities Act Section 10(b), 20(a), and Rule 10b-5
Other Commitments [Line Items]
Loss contingency, number of defendants \| officer		8	9	2
U.S. Privacy Class Actions
Other Commitments [Line Items]
Aggregate legal settlement charge \| $	$ 85.0				$ 66.9