Computer Equipment, Software, Furniture and Leasehold Improvements, Net (Details) (USD $) In Millions, unless otherwise specified	Apr. 30, 2012	Jan. 31, 2012
Property, Plant and Equipment [Line Items]
Computer software, at cost	$ 133.7	$ 133.5
Computer hardware, at cost	157.4	153.3
Leasehold improvements, land and buildings, at cost	142.8	139.5
Furniture and equipment, at cost	48.7	47.7
Property, Plant and Equipment, Gross, Total	482.6	474.0
Less: Accumulated depreciation	(378.6)	(369.5)
Computer software, hardware, leasehold improvements, furniture and equipment, net	$ 104.0	$ 104.5

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount, at the balance sheet date, of long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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- Definition

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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