Business Segment Information - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting [Line Items]
Revenues	$ 1,492,700	$ 1,391,100
Cost of Revenue	808,600	763,100
Selling, general, and administrative	369,700	353,800
Research and development	28,600	26,400
Segment operating income	285,800	246,000
Operating Income (Loss), Before Adjustments	354,800	316,900
Amortization of acquired intangible assets	65,300	67,100
Business Combination, Acquisition-Related Cost, Expense	1,500	500
Tax restructuring costs	300	200
Amortization of inventory and property step-up to fair value	1,800	1,400
Restructuring Charges		1,800
Healthcare
Segment Reporting [Line Items]
Revenues	1,048,300	974,700
Applied Sterilization Technologies
Segment Reporting [Line Items]
Revenues	297,600	281,200
Life Sciences:
Segment Reporting [Line Items]
Revenues	146,700	135,200
Operating Segments | Healthcare
Segment Reporting [Line Items]
Revenues	1,048,300	974,700
Cost of Revenue	589,100	557,400
Selling, general, and administrative	173,900	159,100
Research and development	25,100	22,700
Operating Income (Loss), Before Adjustments	260,200	235,500
Operating Segments | Applied Sterilization Technologies
Segment Reporting [Line Items]
Revenues	297,600	281,200
Cost of Revenue	140,100	129,900
Selling, general, and administrative	14,000	13,700
Research and development	600	900
Operating Income (Loss), Before Adjustments	142,900	136,700
Operating Segments | Life Sciences:
Segment Reporting [Line Items]
Revenues	146,700	135,200
Cost of Revenue	66,000	58,000
Selling, general, and administrative	16,400	16,000
Research and development	2,500	2,400
Operating Income (Loss), Before Adjustments	61,800	58,700
Segment Reporting, Reconciling Item, Corporate Nonsegment
Segment Reporting [Line Items]
Operating Income (Loss), Before Adjustments	$ (110,100)	$ (114,000)