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Leases (Narrative) (Details)
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12 Months Ended |
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Jan. 31, 2015
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| Operating Leased Assets [Line Items] | |
| Operating leases, description | Almost all leases will expire during the next 20 years; however, most leases will be renewed, primarily through an option exercise, or replaced by leases on other premises. |
| Minimum [Member] | |
| Operating Leased Assets [Line Items] | |
| Lessee Leasing Arrangements, Operating Leases, Term of Contract | 3 years |
| Maximum [Member] | |
| Operating Leased Assets [Line Items] | |
| Lessee Leasing Arrangements, Operating Leases, Term of Contract | 20 years |
| Maximum [Member] | Data processing equipment and other personal property [Member] | |
| Operating Leased Assets [Line Items] | |
| Lessee Leasing Arrangements, Operating Leases, Term of Contract | 5 years |