Income Taxes (Schedule Of Reconciliation Of Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011
Unrecognized Tax Benefits [Roll Forward]
Balance, beginning of the year	$ 206,393	$ 154,848	$ 129,767
Additions based on tax positions related to prior years	11,867	26,523	28,262
Reductions based on tax positions related to prior years	(49,493)	(3,858)	(1,473)
Additions based on tax positions related to the current year	2,314	42,735	3,417
Reductions related to settlements with tax authorities	(25,259)	(8,742)	(7,639)
Expiration of statute of limitations	(702)	(2,814)	(315)
Reductions related to foreign currency translation	(278)	(838)
Additions related to foreign currency translation			1,057
Reductions related to other	1,549	(1,461)	1,772
Balance, end of the year	$ 146,391	$ 206,393	$ 154,848

Gross amount of decreases in unrecognized tax benefits resulting from other.

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- Definition

The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

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Gross amount of decreases in unrecognized tax benefits resulting from foreign currency translation.

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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.

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Gross amount of increases in unrecognized tax benefits resulting from foreign currency translation.

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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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