Segment Reporting - Schedule of Segment Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Jun. 30, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total assets	$ 14,197,334	$ 14,488,634
Operating Segments | Networking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total assets	3,545,700	3,472,866
Operating Segments | Materials
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total assets	2,862,533	3,017,858
Operating Segments | Lasers
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total assets	7,062,988	7,361,731
Corporate and shared services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total assets	$ 726,113	$ 636,179