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Revenue Recognition Revenue Recognition - Narrative (Details) $ in Millions | 12 Months Ended
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Jan. 31, 2021 USD ($) category | Jan. 31, 2020 USD ($)
Revenue from Contract with Customer [Abstract] |  |
Number of revenue categories | 3 |
Revenue from External Customer [Line Items] |  |
Number of revenue categories | 3 |
Contract with customer, liability, revenue recognized | $ | $ 2,240 | $ 1,800
Revenue, Performance Obligation, Description of Timing | three years |
Minimum |  |
Revenue from External Customer [Line Items] |  |
Subscription payment terms | 30 days |
EBA payment terms | 30 days |
Maximum |  |
Revenue from External Customer [Line Items] |  |
Subscription payment terms | 45 days |
EBA payment terms | 60 days |

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- Definition EBA Payment Terms + References No definition available. + Details
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- Definition Number of Revenue Categories + References No definition available. + Details
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- Definition Subscription Payment Terms + References No definition available. + Details
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Period Type: | duration

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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + 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 (b) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045 + 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 No definition available. + Details
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- Definition Description of timing for satisfying performance obligation in contract with customer. Includes, but is not limited to, as services are rendered, and upon shipment, delivery or completion of service. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 + Details
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- Details
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- Details
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