Segment and Geographic Data - Sales Information by Product (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 24, 2021	Jan. 23, 2021	Oct. 24, 2020	Jul. 25, 2020	Apr. 25, 2020	Jan. 25, 2020	Oct. 26, 2019	Jul. 27, 2019	Apr. 24, 2021	Apr. 25, 2020	Apr. 27, 2019
Segment Reporting Information [Line Items]
Net sales	$ 1,561,793	$ 1,551,268	$ 1,553,168	$ 1,245,837	$ 1,286,461	$ 1,456,155	$ 1,418,744	$ 1,328,651	$ 5,912,066	$ 5,490,011	$ 5,574,523
Consumable
Segment Reporting Information [Line Items]
Net sales									4,748,441	4,374,829	4,488,224
Equipment and software
Segment Reporting Information [Line Items]
Net sales									822,267	749,390	753,937
Other
Segment Reporting Information [Line Items]
Net sales									341,358	365,792	332,362
Dental net sales
Segment Reporting Information [Line Items]
Net sales									2,327,021	2,101,922	2,191,790
Dental net sales | Consumable
Segment Reporting Information [Line Items]
Net sales									1,314,261	1,141,189	1,221,022
Dental net sales | Equipment and software
Segment Reporting Information [Line Items]
Net sales									731,132	677,677	694,996
Dental net sales | Other
Segment Reporting Information [Line Items]
Net sales									281,628	283,056	275,772
Animal Health net sales
Segment Reporting Information [Line Items]
Net sales									3,559,994	3,336,253	3,354,528
Animal Health net sales | Consumable
Segment Reporting Information [Line Items]
Net sales									3,434,180	3,233,640	3,267,202
Animal Health net sales | Equipment and software
Segment Reporting Information [Line Items]
Net sales									91,135	71,713	58,941
Animal Health net sales | Other
Segment Reporting Information [Line Items]
Net sales									34,679	30,900	28,385
Corporate net sales
Segment Reporting Information [Line Items]
Net sales									25,051	51,836	28,205
Corporate net sales | Other
Segment Reporting Information [Line Items]
Net sales									$ 25,051	$ 51,836	$ 28,205