GOODWILL AND INTANGIBLE ASSETS - Goodwill (Details)
$ in Millions
3 Months Ended
Apr. 30, 2021
USD ($)
Goodwill [Roll Forward]  
Goodwill $ 40,829
Impact of foreign currency translation 10
Goodwill 40,839
Infrastructure Solutions Group  
Goodwill [Roll Forward]  
Goodwill 15,324
Impact of foreign currency translation 10
Goodwill 15,334
Client Solutions Group  
Goodwill [Roll Forward]  
Goodwill 4,237
Impact of foreign currency translation 0
Goodwill 4,237
VMware  
Goodwill [Roll Forward]  
Goodwill 20,802
Impact of foreign currency translation 0
Goodwill 20,802
Other Businesses  
Goodwill [Roll Forward]  
Goodwill 466
Impact of foreign currency translation 0
Goodwill $ 466