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Unearned Revenue and Performance Obligations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022	Jan. 31, 2023
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unearned revenue	$ 3,300		$ 3,300		$ 3,600
Subscription revenue recognized that was included in total unearned revenue balance at beginning of period	1,400	$ 1,200	3,000	$ 2,700
Professional Services, Subject To Cancellation And Pro-Rated Refund Rights
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unearned revenue	70		70		$ 68
Subscription services
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue is expected to be recognized from remaining performance obligations for subscription contracts	18,400		18,400
Subscription services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-11-01 | Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue is expected to be recognized from remaining performance obligations for subscription contracts	$ 6,000		$ 6,000
Recognition period (in months)	12 months		12 months
Subscription services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-11-01 | Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue is expected to be recognized from remaining performance obligations for subscription contracts	$ 10,600		$ 10,600
Recognition period (in months)	24 months		24 months

X

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479837/606-10-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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-Section 50
-Paragraph 8
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-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ References

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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-Topic 606
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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