BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2016 - INTANGIBLE ASSETS USEFUL LIVES (Details) - Individually Immaterial Business Acquisitions |
12 Months Ended |
|---|---|
Jan. 31, 2016 | |
| Business Acquisition [Line Items] | |
| Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 4 years 5 months |
| Customer Relationships | Minimum | |
| Business Acquisition [Line Items] | |
| Finite-Lived Intangible Asset, Useful Life | 5 years |
| Customer Relationships | Maximum | |
| Business Acquisition [Line Items] | |
| Finite-Lived Intangible Asset, Useful Life | 10 years |
| Acquired Technology | Minimum | |
| Business Acquisition [Line Items] | |
| Finite-Lived Intangible Asset, Useful Life | 4 years |
| Acquired Technology | Maximum | |
| Business Acquisition [Line Items] | |
| Finite-Lived Intangible Asset, Useful Life | 5 years |
| Trademarks and Trade Names | |
| Business Acquisition [Line Items] | |
| Finite-Lived Intangible Asset, Useful Life | 3 years |