Consolidated Statements Of Stockholders' Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2018	May 01, 2018
Cash dividends declared per share (in dollars per share)	$ 1.04	$ 1	$ 0.96
Accounting Standards Update 2016-16
Cumulative effect of ASU 2016-16				$ 101.0

Aggregate dividends paid during the period for each share of common stock outstanding.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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Balance Type:	na
Period Type:	duration