Goodwill and Other Intangible Assets - Changes in Carrying Value of Goodwill (Details) $ in Thousands	12 Months Ended
	Apr. 27, 2019 USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 815,977
Goodwill, Acquired During Period	2,047
Other Activity	(1,798)
Ending Balance	816,226
Operating Segments | Dental net sales
Goodwill [Roll Forward]
Beginning Balance	139,654
Goodwill, Acquired During Period	0
Other Activity	(494)
Ending Balance	139,160
Operating Segments | Animal Health net sales
Goodwill [Roll Forward]
Beginning Balance	676,323
Goodwill, Acquired During Period	2,047
Other Activity	(1,304)
Ending Balance	677,066
Operating Segments | Corporate net sales
Goodwill [Roll Forward]
Beginning Balance	0
Goodwill, Acquired During Period	0
Other Activity	0
Ending Balance	$ 0