Common Shares (Tables)

6 Months Ended

Oct. 31, 2018

Stockholders' Equity Note [Abstract]

Common Shares Information

The following table sets forth common share information.

	October 31, 2018	April 30, 2018
Common shares authorized	300.0	300.0
Common shares outstanding	113.8	113.6
Treasury shares	32.7	32.9