Segment and Geographic Data - Information about Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 25, 2025	Jan. 27, 2024	Jan. 25, 2025	Jan. 27, 2024	Apr. 27, 2024
Segment Reporting Information [Line Items]
Net sales	$ 1,572,411	$ 1,616,095	$ 4,788,528	$ 4,845,612
Operating income (loss)	45,441	70,012	112,446	165,137
Total assets	2,832,586		2,832,586		$ 2,896,732
Consumable
Segment Reporting Information [Line Items]
Net sales	1,242,015	1,262,290	3,867,636	3,897,378
Equipment
Segment Reporting Information [Line Items]
Net sales	229,432	245,262	604,453	639,526
Value-added services and other
Segment Reporting Information [Line Items]
Net sales	100,964	108,543	316,439	308,708
Dental
Segment Reporting Information [Line Items]
Net sales	596,328	637,137	1,758,367	1,830,818
Dental | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	42,079	53,630	102,797	147,577
Total assets	902,117		902,117		913,478
Dental | Consumable
Segment Reporting Information [Line Items]
Net sales	327,637	350,953	1,020,662	1,049,492
Dental | Equipment
Segment Reporting Information [Line Items]
Net sales	195,897	211,352	514,908	549,028
Dental | Value-added services and other
Segment Reporting Information [Line Items]
Net sales	72,794	74,832	222,797	232,298
Animal Health
Segment Reporting Information [Line Items]
Net sales	972,380	967,277	3,009,381	3,002,889
Animal Health | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	31,976	32,104	86,964	88,143
Total assets	1,564,171		1,564,171		1,568,413
Animal Health | Consumable
Segment Reporting Information [Line Items]
Net sales	914,378	911,337	2,846,974	2,847,886
Animal Health | Equipment
Segment Reporting Information [Line Items]
Net sales	33,535	33,910	89,545	90,498
Animal Health | Value-added services and other
Segment Reporting Information [Line Items]
Net sales	24,467	22,030	72,862	64,505
Corporate
Segment Reporting Information [Line Items]
Net sales	3,703	11,681	20,780	11,905
Corporate | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	(28,614)	(15,722)	(77,315)	(70,583)
Total assets	366,298		366,298		$ 414,841
Corporate | Value-added services and other
Segment Reporting Information [Line Items]
Net sales	3,703	11,681	20,780	11,905
United States
Segment Reporting Information [Line Items]
Net sales	1,306,696	1,335,821	3,964,973	4,010,344
United States | Dental
Segment Reporting Information [Line Items]
Net sales	543,490	577,516	1,604,024	1,661,560
United States | Animal Health
Segment Reporting Information [Line Items]
Net sales	759,503	746,624	2,340,169	2,336,879
United States | Corporate
Segment Reporting Information [Line Items]
Net sales	3,703	11,681	20,780	11,905
United Kingdom
Segment Reporting Information [Line Items]
Net sales	180,784	187,735	570,994	559,806
United Kingdom | Animal Health
Segment Reporting Information [Line Items]
Net sales	180,784	187,735	570,994	559,806
Canada
Segment Reporting Information [Line Items]
Net sales	84,931	92,539	252,561	275,462
Canada | Dental
Segment Reporting Information [Line Items]
Net sales	52,838	59,621	154,343	169,258
Canada | Animal Health
Segment Reporting Information [Line Items]
Net sales	$ 32,093	$ 32,918	$ 98,218	$ 106,204