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SEGMENT INFORMATION (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||||||||||||
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Feb. 28, 2013
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Feb. 29, 2012
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Feb. 28, 2013
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Feb. 29, 2012
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| Revenues Included for Management Reporting Not Recognized in Consolidated Statements of Operations (Narrative) [Abstract] | ||||||||||||||
| New software licenses and cloud software subscriptions revenues | $ 6 | [1] | $ 37 | [1] | ||||||||||
| Software license updates and product support revenues | 4 | [1] | 17 | [1] | 12 | [1] | 40 | [1] | ||||||
| Hardware systems support revenues | 2 | [1] | 6 | [1] | 10 | [1] | 26 | [1] | ||||||
| Segment Reporting Information [Line Items] | ||||||||||||||
| Revenues | 8,970 | [2] | 9,062 | [2] | 26,292 | [2] | 26,271 | [2] | ||||||
| Expenses | 3,239 | 3,336 | 9,574 | 10,039 | ||||||||||
| Margin | 5,731 | [3] | 5,726 | [3] | 16,718 | [3] | 16,232 | [3] | ||||||
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New software licenses and cloud software subscriptions [Member]
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| Segment Reporting Information [Line Items] | ||||||||||||||
| Revenues | 2,334 | [2] | 2,370 | [2] | 6,321 | [2] | 5,908 | [2] | ||||||
| Sales and distribution expenses | 1,379 | 1,239 | 3,812 | 3,595 | ||||||||||
| Margin | 955 | [3] | 1,131 | [3] | 2,509 | [3] | 2,313 | [3] | ||||||
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Software license updates and product support [Member]
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| Segment Reporting Information [Line Items] | ||||||||||||||
| Revenues | 4,344 | [2] | 4,068 | [2] | 12,752 | [2] | 12,098 | [2] | ||||||
| Software license updates and product support expenses | 276 | 282 | 808 | 824 | ||||||||||
| Margin | 4,068 | [3] | 3,786 | [3] | 11,944 | [3] | 11,274 | [3] | ||||||
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Total software business [Member]
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| Segment Reporting Information [Line Items] | ||||||||||||||
| Revenues | 6,678 | [2] | 6,438 | [2] | 19,073 | [2] | 18,006 | [2] | ||||||
| Expenses | 1,655 | 1,521 | 4,620 | 4,419 | ||||||||||
| Margin | 5,023 | [3] | 4,917 | [3] | 14,453 | [3] | 13,587 | [3] | ||||||
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Hardware systems products [Member]
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| Segment Reporting Information [Line Items] | ||||||||||||||
| Revenues | 671 | 869 | 2,185 | 2,851 | ||||||||||
| Hardware systems products expenses | 336 | 425 | 1,086 | 1,365 | ||||||||||
| Sales and distribution expenses | 212 | 250 | 643 | 788 | ||||||||||
| Margin | 123 | [3] | 194 | [3] | 456 | [3] | 698 | [3] | ||||||
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Hardware systems support [Member]
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| Segment Reporting Information [Line Items] | ||||||||||||||
| Revenues | 572 | [2] | 610 | [2] | 1,740 | [2] | 1,900 | [2] | ||||||
| Hardware systems support expenses | 210 | 247 | 646 | 767 | ||||||||||
| Margin | 362 | [3] | 363 | [3] | 1,094 | [3] | 1,133 | [3] | ||||||
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Total hardware systems business [Member]
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| Segment Reporting Information [Line Items] | ||||||||||||||
| Revenues | 1,243 | [2] | 1,479 | [2] | 3,925 | [2] | 4,751 | [2] | ||||||
| Expenses | 758 | 922 | 2,375 | 2,920 | ||||||||||
| Margin | 485 | [3] | 557 | [3] | 1,550 | [3] | 1,831 | [3] | ||||||
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Total services business [Member]
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| Segment Reporting Information [Line Items] | ||||||||||||||
| Revenues | 1,049 | [2] | 1,145 | [2] | 3,294 | [2] | 3,514 | [2] | ||||||
| Services expenses | 826 | 893 | 2,579 | 2,700 | ||||||||||
| Margin | $ 223 | [3] | $ 252 | [3] | $ 715 | [3] | $ 814 | [3] | ||||||
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