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Revenue Recognition - Other Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jul. 31, 2022 | Jul. 31, 2021 | Jul. 31, 2022 | Jul. 31, 2021 | Jan. 31, 2022
Capitalized Contract Cost [Line Items] |  |  |  |  |
Amortization period (in years) | 5 years |  | 5 years |  | 3 years
Capitalized costs to obtain customer contracts | $ 83.5 |  | $ 83.5 |  | $ 83.0
Amortization of costs to obtain customer contracts | 11.2 | $ 8.6 | 22.2 | $ 16.7 |
Revenue recognized previously included in deferred revenue balance | 128.4 | $ 96.9 | 199.4 | $ 153.5 |
Contract assets | 3.1 |  | 3.1 |  | 3.2
Prepaid expenses and other current assets |  |  |  |  |
Capitalized Contract Cost [Line Items] |  |  |  |  |
Capitalized costs to obtain customer contracts | 39.7 |  | 39.7 |  | 40.7
Other noncurrent assets |  |  |  |  |
Capitalized Contract Cost [Line Items] |  |  |  |  |
Capitalized costs to obtain customer contracts | $ 43.8 |  | $ 43.8 |  | $ 42.3

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- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126905575&loc=SL49131252-203054 + Details
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- Definition Amortization period of cost capitalized in obtaining or fulfilling contract with customer, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126905575&loc=SL49131251-203054 + Details
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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130531-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130533-203044 + Details
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