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Subsequent Event	3 Months Ended
Subsequent Event	Jul. 31, 2017
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event Events that have occurred subsequent to July 31, 2017 have been evaluated for disclosure. On August 22, 2017, the Company issued $250 million in aggregate principal amount of 3.77% Senior Notes due August 22, 2028. Further information is set forth in the Current Report on Form 8-K filed by the Company on August 25, 2017.