Business Segment Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2018
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Segment Reporting Information [Line Items]                        
Asset Impairment Charges                 $ 16,249      
amortization of inventory and property step up to fair value [1]                   $ 2,392 $ 2,440 $ 1,599
amortization and impairment of acquired intangible assets [1]                   71,675 86,878 67,793
Business Combination, Acquisition Related Costs [2]                   8,225 8,901 16,211
loss (gain) on fair value contingent consideration adjustments [1]                     (842) (593)
Gain (Loss) on Disposition of Business                   1,770 (1,370) [1] 14,547 [1]
Impact of TCJA on Operating Income                     0 [3] 10,264
COVID-19 incremental costs                   749 [4] 0 0
redomiciliation costs [5]                   3,699 8,783 0
Restructuring expenses [6]                   3,143 40,708 103
Assets $ 5,425,582       $ 5,073,071         5,425,582 5,073,071  
Payments to Acquire Productive Assets                   214,516 189,715 165,457
Depreciation, Depletion and Amortization                   197,235 225,921 178,332
Property, Plant and Equipment, Net 1,111,855       1,031,582         1,111,855 1,031,582  
Revenues 822,991 $ 774,261 $ 736,840 $ 696,803 768,213 $ 696,238 $ 678,961 $ 638,758   3,030,895 2,782,170 2,619,996
Operating Income (Loss)                   536,973 411,465 399,883
Applied Sterilization Technologies [Member]                        
Segment Reporting Information [Line Items]                        
Assets 2,720,205       2,655,870         2,720,205 2,655,870  
Payments to Acquire Productive Assets                   129,868 100,077 96,193
Depreciation, Depletion and Amortization                   105,042 [7] 111,265 [7] 97,038
Revenues                   627,147 555,127 513,287
Operating Income (Loss)                   270,917 221,828 196,297
Life Science Member [Member]                        
Segment Reporting Information [Line Items]                        
Revenues                   416,939 378,558 361,590
Operating Income (Loss)                   144,088 132,129 123,889
Life Science Member [Member] | Consumable revenues [Member]                        
Segment Reporting Information [Line Items]                        
Revenues                   185,904 161,780 150,656
Life Science Member [Member] | Capital equipment revenues [Member]                        
Segment Reporting Information [Line Items]                        
Revenues                   112,747 102,714 100,555
Life Science Member [Member] | Service revenues [Member]                        
Segment Reporting Information [Line Items]                        
Revenues                   118,288 114,064 110,379
OperatingSegmentAllExceptCorpandOther [Member]                        
Segment Reporting Information [Line Items]                        
Revenues                   3,030,895 2,782,170 2,619,996
Operating Income (Loss)                   835,641 741,863 672,806
OperatingSegmentCorpandOther [Member]                        
Segment Reporting Information [Line Items]                        
Operating Income (Loss)                   (207,015) (184,900) (162,999)
OperatingSegmentAll [Member]                        
Segment Reporting Information [Line Items]                        
Revenues                   3,030,895 2,782,170 2,619,996
Operating Income (Loss)                   628,626 556,963 509,807
Healthcare and Life Sciences [Member]                        
Segment Reporting Information [Line Items]                        
Assets 1,809,636       1,611,852         1,809,636 1,611,852  
Payments to Acquire Productive Assets                   44,029 49,688 52,767
Depreciation, Depletion and Amortization                   59,150 [7] 81,264 [7],[8] 52,025
Healthcare Specialty Services [Member]                        
Segment Reporting Information [Line Items]                        
Assets 895,741       805,349         895,741 805,349  
Payments to Acquire Productive Assets                   40,619 39,950 16,497
Depreciation, Depletion and Amortization                   33,043 33,392 29,269
Revenues                   563,611 510,057 469,065
Operating Income (Loss)                   64,217 64,222 58,458
Healthcare Products [Member]                        
Segment Reporting Information [Line Items]                        
Revenues                   1,423,198 1,338,428 1,276,054
Operating Income (Loss)                   356,419 323,684 294,162
Healthcare Products [Member] | Consumable revenues [Member]                        
Segment Reporting Information [Line Items]                        
Revenues                   454,518 414,969 412,495
Healthcare Products [Member] | Capital equipment revenues [Member]                        
Segment Reporting Information [Line Items]                        
Revenues                   592,436 568,811 527,402
Healthcare Products [Member] | Service revenues [Member]                        
Segment Reporting Information [Line Items]                        
Revenues                   376,244 354,648 336,157
IRELAND                        
Segment Reporting Information [Line Items]                        
Property, Plant and Equipment, Net 47,459       41,137         47,459 41,137  
Revenues                   63,821 56,784 48,246
UNITED STATES                        
Segment Reporting Information [Line Items]                        
Property, Plant and Equipment, Net 632,333       577,113         632,333 577,113  
Revenues                   2,211,722 1,976,814 1,836,414
Other foreign locations [Member]                        
Segment Reporting Information [Line Items]                        
Revenues                   755,352 748,572 $ 735,336
Other Foreign Entities [Member]                        
Segment Reporting Information [Line Items]                        
Property, Plant and Equipment, Net $ 432,063       $ 413,332         $ 432,063 $ 413,332  
[1] For more information regarding our recent acquisitions and divestitures see Note 18 titled, "Business Acquisitions and Divestitures". Amortization of purchased intangible assets fiscal 2019 total includes an impairment charge of $16,249, see Note 3 titled, "Goodwill and Intangible Assets", for more information.
[2] Acquisition and integration related charges include transaction costs and integration expenses associated with acquisitions.
[3] Represents a one-time special employee bonus paid to most U.S. employees and associated professional fees.
[4] COVID-19 incremental costs includes the additional costs attributable to COVID-19 such as enhanced cleaning protocols, personal protective equipment for our employees, event cancellation fees, and payroll costs associated with our response to COVID-19, net of any government subsidies available.

[5] Costs incurred in connection with the Redomiciliation
[6] For more information regarding our restructuring activities see Note 2 titled, "Restructuring"
[7] The fiscal 2020 and 2019 totals include the impact of Restructuring see Note 2 titled, "Restructuring" for additional information.
[8] The fiscal 2019 total includes an impairment charge see Note 3 titled, "Goodwill and Intangible Assets", for additional information.