Income Taxes	6 Months Ended
Oct. 31, 2011
Income Taxes [Abstract]
Income Taxes	8. Income Taxes We file a consolidated federal income tax return in the United States and file tax returns in various state and foreign jurisdictions. The U.S. Federal consolidated tax returns for the years 1999 through 2009 are currently under examination by the Internal Revenue Service, with the 1999-2007 years currently at the appellate level. Federal returns for tax years prior to 1999 are closed by statute. Historically, tax returns in various foreign and state jurisdictions are examined and settled upon completion of the exam. We had gross unrecognized tax benefits of $158.0 million and $154.8 million at October 31, 2011 and April 30, 2011, respectively. The gross unrecognized tax benefits increased $3.2 million net in the current year, due to accruals of tax on positions related to prior years partially offset by statute of limitations expirations and settlements with taxing authorities. Except as noted below, we have classified the liability for unrecognized tax benefits, including corresponding accrued interest, as long-term at October 31, 2011, and included this amount in other noncurrent liabilities on the condensed consolidated balance sheet. Based upon the expiration of statutes of limitations, payments of tax and other factors in several jurisdictions, we believe it is reasonably possible that the gross amount of reserves for previously unrecognized tax benefits may decrease by $16.8 million within twelve months of October 31, 2011. This portion of our liability for unrecognized tax benefits has been classified as current and is included in accounts payable, accrued expenses and other current liabilities on the condensed consolidated balance sheets.

Income Taxes

6 Months Ended

Oct. 31, 2011

8. Income Taxes

We file a consolidated federal income tax return in the United States and file tax returns in various state and foreign jurisdictions. The U.S. Federal consolidated tax returns for the years 1999 through 2009 are currently under examination by the Internal Revenue Service, with the 1999-2007 years currently at the appellate level. Federal returns for tax years prior to 1999 are closed by statute. Historically, tax returns in various foreign and state jurisdictions are examined and settled upon completion of the exam.

We had gross unrecognized tax benefits of $158.0 million and $154.8 million at October 31, 2011 and April 30, 2011, respectively. The gross unrecognized tax benefits increased $3.2 million net in the current year, due to accruals of tax on positions related to prior years partially offset by statute of limitations expirations and settlements with taxing authorities. Except as noted below, we have classified the liability for unrecognized tax benefits, including corresponding accrued interest, as long-term at October 31, 2011, and included this amount in other noncurrent liabilities on the condensed consolidated balance sheet.

Based upon the expiration of statutes of limitations, payments of tax and other factors in several jurisdictions, we believe it is reasonably possible that the gross amount of reserves for previously unrecognized tax benefits may decrease by $16.8 million within twelve months of October 31, 2011. This portion of our liability for unrecognized tax benefits has been classified as current and is included in accounts payable, accrued expenses and other current liabilities on the condensed consolidated balance sheets.