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INCOME TAXES Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
May 31, 2016 | May 31, 2015 | May 31, 2014
Deferred Tax Assets and Liabilities (Narrative) [Abstract] |  |  |
Temporary differences related to undistributed foreign earnings | $ 42,600 |  |
Other outside basis temporary differences of investments in foreign subsidiaries | 8,300 |  |
Potential net deferred tax liability associated with these undistributed foreign earnings | 13,300 |  |
Potential net deferred tax liability related to other outside basis temporary differences | 2,700 |  |
Net deferred tax assets | 1,131 | $ 993 |
Valuation allowance | $ 1,173 | 1,024 |
Income Tax Uncertainties [Abstract] |  |  |
Income tax examinations | Our U.S. federal income tax returns have been examined for all years prior to fiscal 2007 and we are no longer subject to audit for those periods. Our U.S. state income tax returns, with some exceptions, have been examined for all years prior to fiscal 2004 and we are no longer subject to audit for those periods. With some exceptions, we are generally no longer subject to tax examinations in non-U.S. jurisdictions for years prior to fiscal 1997. In some, although not all, cases, we have reserved for potential adjustments to our provision for income taxes and accrual of indirect taxes that may result from examinations by, or any negotiated agreements with, these tax authorities or final outcomes in judicial proceedings, and we believe that the final outcome of these examinations, agreements or judicial proceedings will not have a material effect on our results of operations. |  |
Tax Credit Carryforward [Line Items] |  |  |
Tax credit carryforwards subject to limitation on utilization | $ 1,200 |  |
Tax credit carryforwards not subject to expiration dates | 652 |  |
Tax credit carryforwards subject to expiration dates | 541 |  |
Unrecognized Tax Benefits (Narrative) [Abstract] |  |  |
Unrecognized tax benefits that would affect our effective tax rate if recognized | 3,100 | 2,800 | $ 2,600
Interest and penalties related to uncertain tax positions accrued | 765 | 756 |
Interest and penalties related to uncertain tax positions recognized in our provision for income taxes | 26 | $ 102 | $ 24
Reasonably possible decrease in the next 12 months in gross unrecognized tax benefits related to domestic audits, net of offsetting tax benefits | 176 |  |
Reasonably possible decrease in gross unrecognized tax benefits related to foreign audits, net of offsetting tax benefits | $ 74 |  |
Earliest Tax Year [Member] |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Tax credit carryforward expiration dates | May 31, 2017 |  |
Latest Tax Year [Member] |  |  |
Tax Credit Carryforward [Line Items] |  |  |
Tax credit carryforward expiration dates | May 31, 2035 |  |
Federal [Member] |  |  |
Operating loss carryforwards [Line Items] |  |  |
Net operating loss carryforwards | $ 758 |  |
Federal [Member] | Earliest Tax Year [Member] |  |  |
Operating loss carryforwards [Line Items] |  |  |
Operating loss carryforwards expiration date | May 31, 2017 |  |
Federal [Member] | Latest Tax Year [Member] |  |  |
Operating loss carryforwards [Line Items] |  |  |
Operating loss carryforwards expiration date | May 31, 2035 |  |
State [Member] |  |  |
Operating loss carryforwards [Line Items] |  |  |
Net operating loss carryforwards | $ 2,700 |  |
State [Member] | Earliest Tax Year [Member] |  |  |
Operating loss carryforwards [Line Items] |  |  |
Operating loss carryforwards expiration date | May 31, 2017 |  |
State [Member] | Latest Tax Year [Member] |  |  |
Operating loss carryforwards [Line Items] |  |  |
Operating loss carryforwards expiration date | May 31, 2035 |  |
Foreign [Member] |  |  |
Operating loss carryforwards [Line Items] |  |  |
Net operating loss carryforwards | $ 1,600 |  |
Foreign net operating loss carryforwards not subject to expiration | 1,400 |  |
Foreign net operating loss carryforwards subject to expiration | 240 |  |
Reasonably possible decrease in the next 12 months in gross unrecognized tax benefits | $ 199 |  |
Foreign [Member] | Earliest Tax Year [Member] |  |  |
Operating loss carryforwards [Line Items] |  |  |
Operating loss carryforwards expiration date | May 31, 2017 |  |
Foreign [Member] | Latest Tax Year [Member] |  |  |
Operating loss carryforwards [Line Items] |  |  |
Operating loss carryforwards expiration date | May 31, 2036 |  |
Domestic [Member] |  |  |
Operating loss carryforwards [Line Items] |  |  |
Reasonably possible decrease in the next 12 months in gross unrecognized tax benefits | $ 228 |  |

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