Property And Equipment (Property And Equipment) (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 565.1	$ 571.8
Less accumulated depreciation and amortization	(479.9)	(484.0)
Property and equipment, net	85.2	87.8
Computers, Software, Furniture And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	509.0	513.6
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	49.4	46.7
Projects In Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 6.7	$ 11.5

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 of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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