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Share-Based Compensation - Other Stock Options Details (Details) (Stock Options [Member])
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12 Months Ended |
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Jan. 31, 2015
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Stock Options [Member]
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| Vesting Details [Line Items] | |
| Annual Award Vesting Percentage | 25.00% |
| Award Contractual Life | 4 years |
| Award Vesting Period | 10 years |