GOODWILL (Details) (USD $)
In Millions, unless otherwise specified
 6 Months Ended
Nov. 30, 2012
Goodwill [Line Items]  
Balances at period start $ 25,119
Goodwill from acquisitions 449
Goodwill adjustments (110) [1]
Balances at period end 25,458
New Software Licenses and Cloud Software Subscriptions [Member]
  
Goodwill [Line Items]  
Balances at period start 7,367
Allocation of goodwill 2,346 [2]
Goodwill from acquisitions 297
Goodwill adjustments (93) [1]
Balances at period end 9,917
Software License Updates and Product Support [Member]
  
Goodwill [Line Items]  
Balances at period start 12,479
Goodwill from acquisitions 19
Goodwill adjustments (23) [1]
Balances at period end 12,475
Hardware Systems Support [Member]
  
Goodwill [Line Items]  
Balances at period start 1,193
Goodwill from acquisitions 61
Goodwill adjustments 4 [1]
Balances at period end 1,258
Other [Member]
  
Goodwill [Line Items]  
Balances at period start 4,080 [3]
Allocation of goodwill (2,346) [2],[3]
Goodwill from acquisitions 72 [3]
Goodwill adjustments 2 [1],[3]
Balances at period end $ 1,808 [3]
[1] Pursuant to our business combinations accounting policy, we recorded goodwill adjustments for the effect on goodwill of changes to net assets acquired during the measurement period (up to one year from the date of an acquisition). Goodwill adjustments were not significant to our previously reported operating results or financial position.
[2] Represents the allocation of goodwill to our operating segments upon completion of our intangible asset valuations.
[3] Represents goodwill allocated to our other operating segments and goodwill to be allocated to our operating segments upon completion of our intangible asset valuations, if any.