ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Millions |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
May. 31, 2015 |
May. 31, 2014 |
May. 31, 2013 |
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| Acquisition Related and Other Expenses [Abstract] | ||||||
| Transitional and other employee related costs | $ 57 | $ 27 | $ 27 | |||
| Stock-based compensation | 5 | 10 | 33 | |||
| Professional fees and other, net | (35) | 20 | (276) | |||
| Business combination adjustments, net | 184 | (16) | (388) | |||
| Total acquisition related and other expenses | 211 | 41 | (604) | |||
| Goodwill impairment loss | [1] | 186 | ||||
| Benefit related to certain litigation | 53 | 306 | ||||
| Change in fair value of contingent consideration payable | 387 | |||||
| Advertising [Abstract] | ||||||
| Advertising expenses | 55 | 79 | 85 | |||
| Basis of Financial Statements [Abstract] | ||||||
| Goodwill impairment loss | [1] | 186 | ||||
| Benefit related to certain litigation | 53 | 306 | ||||
| Change in fair value of contingent consideration payable | 387 | |||||
| Foreign Currency [Abstract] | ||||||
| Net foreign exchange transaction losses included in non-operating income (expense), net | 157 | 375 | 162 | |||
| Goodwill, Intangible Assets and Impairment Assessments [Abstract] | ||||||
| Goodwill impairment loss | [1] | 186 | ||||
| Impairment of intangible assets | 0 | 0 | 0 | |||
| Non-Operating Income (Expense), net [Abstract] | ||||||
| Interest income | 349 | 263 | 237 | |||
| Foreign currency losses, net | (157) | (375) | (162) | |||
| Noncontrolling interests in income | (113) | (98) | (112) | |||
| Other income, net | 27 | 69 | 48 | |||
| Total non-operating income (expense), net | 106 | (141) | 11 | |||
| Foreign currency remeasurement loss resulting from the devaluation of the Venezuelan currency | 23 | 213 | 64 | |||
| Other Receivables [Narrative] [Abstract] | ||||||
| Other receivables included in prepaid expenses and other current assets | 817 | 906 | ||||
| Sales of Financing Receivables [Narrative] [Abstract] | ||||||
| Sales of financing receivables | $ 1,800 | $ 2,000 | $ 2,200 | |||
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