Income Tax 5 (Details) (USD $) In Millions	12 Months Ended
Apr. 27, 2011	Apr. 28, 2010	Apr. 29, 2009
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at the beginning of the fiscal year	$ 57.1	$ 86.6	$ 129.1
Increases for tax positions of prior years	13.5	3.7	9.4
Decreases for tax positions of prior years	(26.0)	(35.4)	(59.5)
Increases based on tax positions related to the current year	10.8	10.4	13.1
Increases due to business combination accounting	26.9		3.8
Decreases due to settlements with taxing authorities	(5.4)	(0.8)	(0.8)
Decreases due to lapse of statute of limitations	(6.2)	(7.4)	(8.5)
Balance at the end of the fiscal year	$ 70.7	$ 57.1	$ 86.6

Unrecognized tax benefits increases resulting from business combinations.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The gross amount of unrecognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns) pertaining to uncertain tax positions taken in tax returns as of the beginning balance sheet date, excluding amounts pertaining to examined tax returns.

+ References

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The gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.

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The gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.

+ References

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The gross amount of increases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitations.

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