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Income Taxes - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
May 31, 2016 | May 31, 2015 | May 31, 2014 | May 31, 2013
Income Tax Contingency [Line Items] |  |  |  |
Effective tax rate, change from prior period | (3.50%) | (1.80%) |  |
Total gross unrecognized tax benefits, excluding related interest and penalties | $ 506,000,000 | $ 438,000,000 | $ 506,000,000 | $ 447,000,000
Total gross unrecognized tax benefits, excluding related interest and penalties, amount which would affect the Company's effective tax rate if recognized in future periods | 290,000,000 |  |  |
Increase (decrease) in liability for payment of interest and penalties | 45,000,000 | (3,000,000) | 55,000,000 |
Accrued interest and penalties related to uncertain tax positions (excluding federal benefit) | 209,000,000 | 164,000,000 |  |
Estimated decrease in total gross unrecognized tax benefits as a result of resolutions of global tax examinations and expiration of applicable statutes of limitations | 92,000,000 |  |  |
Reinvestment of the cumulative undistributed earnings of certain foreign subsidiaries | 10,700,000,000 |  |  |
Unrecognized deferred tax liability associated with the indefinitely reinvested undistributed earnings | $ 3,600,000,000 |  |  |
Tax holiday, expiration period | 2021 |  |  |
Decrease in income tax expense related to tax holiday | $ 173,000,000 | $ 174,000,000 | $ 138,000,000 |
Decrease in income tax expense related to tax holiday per diluted share, (in dollars per share) | $ 0.10 | $ 0.10 | $ 0.08 |
Valuation allowance increase (decrease) related to tax benefits of certain subsidiaries with operating losses | $ 43,000,000 | $ 0 | $ 4,000,000 |
Available domestic and foreign loss carry-forwards | 143,000,000 |  |  |
Income tax benefits attributable to employee stock-based compensation | 281,000,000 | $ 224,000,000 | $ 135,000,000 |
Tax Year 2012 | Domestic Tax Authority |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Proposed increase in tax related to the foreign tax credit matter | 223,000,000 |  |  |
Tax Year 2011 | Domestic Tax Authority |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Proposed increase in tax related to the foreign tax credit matter | $ 31,000,000 |  |  |

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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319 + Details
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- Definition Amount of deferred tax liability not recognized because of the exceptions to comprehensive recognition of deferred taxes related to undistributed earnings of foreign subsidiaries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331 + Details
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- Definition Estimated amount of loss resulting from an adverse tax position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319 + Details
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- Definition The amount the liability recorded for the income tax examination increased or decreased in the current year/accounting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 + Details
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- Definition The amount of income taxes from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330215-122817 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 + Details
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- Definition The aggregate cash inflow comprised of the amount received from (a) employees to acquire the entity's shares under incentive awards, including stock option exercises and restricted stock arrangements, and (b) the excess tax benefit arising from such transactions. + References No definition available. + Details
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