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Acquisitions - Summary of Fair Value of Assets Acquired and Liabilities Assumed by Major Class (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 31, 2022
USD ($)
acquisition
Jul. 31, 2022
USD ($)
businessCombination
Jan. 31, 2022
USD ($)
Business Acquisition [Line Items]      
Goodwill $ 3,612 $ 3,612 $ 3,604
Number of businesses combinations | acquisition 0    
Series of Individually Immaterial Business Acquisitions      
Business Acquisition [Line Items]      
Goodwill $ 85 85  
Deferred revenue and long-term deferred revenue (2) (2)  
Long-term deferred income taxes 1 1  
Net tangible assets 1 1  
Total 97 $ 97  
Number of businesses combinations | businessCombination   2  
Series of Individually Immaterial Business Acquisitions | Developed technologies      
Business Acquisition [Line Items]      
Finite-lived intangibles 8 $ 8  
Series of Individually Immaterial Business Acquisitions | Customer relationships      
Business Acquisition [Line Items]      
Finite-lived intangibles $ 4 $ 4