Statements of Cash Flows - Supplemental Cash Flows and Non Cash Investing and Financing Activities (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
Oct. 26, 2012	Oct. 28, 2011
Non-cash Investing and Financing Activities:
Reclassification of equity component of convertible debt	$ 62.6	$ 114.6
Acquisition of property and equipment on account	20.0	41.0
Acquisition of property and equipment through long-term financing	0.8	2.5
Supplemental Cash Flow Information:
Income taxes paid, net of refunds	26.5	22.7
Interest paid, net of capitalized interest	$ 11.3	$ 10.3

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

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- Definition

The amount of fixed assets that an Entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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