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Segment Geographic and Significant Customer Information - Schedule of Property and Equipment Net by Geographic Areas (Detail) (USD $) In Millions, unless otherwise specified	Jul. 27, 2012	Apr. 27, 2012
Segment Reporting, Asset Reconciling Item [Line Items]
United States	$ 1,041.2	$ 1,038.9
International	97.9	98.3
Property and equipment, net	$ 1,139.1	$ 1,137.2
Concentration risk, percentage	10.00%	10.00%

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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