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Business and Summary of Significant Accounting Policies - Computer Equipment, Software, Furniture, and Leasehold Improvements, Net (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jan. 31, 2025 | Jan. 31, 2024 | Jan. 31, 2023
Property, Plant and Equipment [Line Items] |  |  |
Computer software, at cost | $ 0.0 | $ 0.0 |
Depreciation | 43.0 | 47.0 | $ 50.0
Tangible asset impairment charges | $ 0.0 | $ 0.0 | $ 0.0
Software and Software Development Costs |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 2 years |  |
Computer software, at cost |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 3 years |  |
Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 3 years |  |
Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Useful life | 5 years |  |

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- Definition Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 + Details
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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A + Details
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