Income Taxes	9 Months Ended
Jan. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes During the three-month period ended January 31, 2016, the effective tax rate varied from the U.S. statutory income tax rate primarily due to the domestic manufacturing deduction, offset by state income taxes. During the nine-month period ended January 31, 2016, the effective tax rate varied from the U.S. statutory income tax rate primarily due to state income taxes, partially offset to some extent by the domestic manufacturing deduction. Within the next 12 months, it is reasonably possible that we could decrease our unrecognized tax benefits by an additional $2.2, primarily as a result of expiring statute of limitations periods.

Income Taxes

9 Months Ended

Jan. 31, 2016

During the three-month period ended January 31, 2016, the effective tax rate varied from the U.S. statutory income tax rate primarily due to the domestic manufacturing deduction, offset by state income taxes.

During the nine-month period ended January 31, 2016, the effective tax rate varied from the U.S. statutory income tax rate primarily due to state income taxes, partially offset to some extent by the domestic manufacturing deduction.

Within the next 12 months, it is reasonably possible that we could decrease our unrecognized tax benefits by an additional $2.2, primarily as a result of expiring statute of limitations periods.