Revenue from Contracts with Customers - Schedule of Disaggregated Revenue by Market and Product (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 1,208,809	$ 1,240,194	$ 3,393,326	$ 3,955,049
Industrial
Disaggregation of Revenue [Line Items]
Revenues	421,178	438,205	1,248,880	1,349,453
Communications
Disaggregation of Revenue [Line Items]
Revenues	615,791	538,305	1,595,651	1,723,758
Electronics
Disaggregation of Revenue [Line Items]
Revenues	73,613	139,078	252,134	519,477
Instrumentation
Disaggregation of Revenue [Line Items]
Revenues	98,227	124,606	296,661	362,361
Operating Segments | Networking
Disaggregation of Revenue [Line Items]
Revenues	618,824	551,099	1,615,908	1,756,327
Operating Segments | Networking | Industrial
Disaggregation of Revenue [Line Items]
Revenues	16,361	17,570	47,072	52,189
Operating Segments | Networking | Communications
Disaggregation of Revenue [Line Items]
Revenues	593,223	521,291	1,538,847	1,664,205
Operating Segments | Networking | Electronics
Disaggregation of Revenue [Line Items]
Revenues	1,643	2,849	4,820	9,674
Operating Segments | Networking | Instrumentation
Disaggregation of Revenue [Line Items]
Revenues	7,597	9,389	25,169	30,259
Operating Segments | Materials
Disaggregation of Revenue [Line Items]
Revenues	238,982	323,769	737,300	1,061,809
Operating Segments | Materials | Industrial
Disaggregation of Revenue [Line Items]
Revenues	134,516	156,846	404,847	450,383
Operating Segments | Materials | Communications
Disaggregation of Revenue [Line Items]
Revenues	22,568	17,014	56,804	59,553
Operating Segments | Materials | Electronics
Disaggregation of Revenue [Line Items]
Revenues	71,970	136,229	247,314	509,803
Operating Segments | Materials | Instrumentation
Disaggregation of Revenue [Line Items]
Revenues	9,928	13,680	28,335	42,070
Operating Segments | Lasers
Disaggregation of Revenue [Line Items]
Revenues	351,003	365,326	1,040,118	1,136,913
Operating Segments | Lasers | Industrial
Disaggregation of Revenue [Line Items]
Revenues	270,301	263,789	796,961	846,881
Operating Segments | Lasers | Communications
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments | Lasers | Electronics
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments | Lasers | Instrumentation
Disaggregation of Revenue [Line Items]
Revenues	$ 80,702	$ 101,537	$ 243,157	$ 290,032