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Property and Equipment, Net - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Oct. 31, 2021
Apr. 30, 2021
Oct. 31, 2020
Oct. 31, 2021
Oct. 31, 2020
Jan. 31, 2021
Property, Plant and Equipment [Line Items]            
Depreciation expense $ 66   $ 58 $ 194 $ 170  
Pleasanton, California | Affiliated Entity            
Property, Plant and Equipment [Line Items]            
Asset acquisition, consideration transferred   $ 173        
Expenses from transactions with related party   2       $ 2
Property, plant and equipment, additions   158        
Difference between right-of-use asset and lease liability   $ 15