Balance Sheet Details - Other Current Assets (Detail) (USD $) In Millions, unless otherwise specified	Oct. 26, 2012	Apr. 27, 2012
Other Assets, Current [Line Items]
Deferred tax assets	$ 248.4	$ 201.6
Prepaid expenses and other current assets	233.5	225.4
Short-term restricted cash	6.6	8.6
Other current assets	$ 488.5	$ 435.6

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences expected to be realized or consumed within one year or operating cycle, if longer.

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The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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