Segment Reporting - Financial Information of Company's Operations by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Jun. 30, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	$ 1,240,194	$ 827,724	$ 3,955,049	$ 2,429,654
Inter-segment revenues	0	0	0	0
Operating income (loss)	67,388	106,768	118,110	300,041
Interest expense	(75,183)	(43,499)	(207,976)	(72,752)
Other income (expense), net	3,048	(241)	(32,253)	5,535
Income tax benefit	(7,293)	14,027	(40,895)	41,701
Net earnings	2,546	49,002	(81,224)	191,123
Depreciation and amortization	160,941	72,817	478,136	213,535
Expenditures for property, plant & equipment	97,145	94,302	342,999	195,991
Segment assets	14,117,632		14,117,632		$ 7,844,846
Goodwill	4,505,137		4,505,137		1,285,759
Unallocated & Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	0	0	0	0
Inter-segment revenues	(114,680)	(83,290)	(333,031)	(279,868)
Operating income (loss)	0	(9,604)	0	(29,511)
Interest expense	0	0	0	0
Other income (expense), net	0	0	0	0
Income tax benefit	0	0	0	0
Net earnings	0	0	0	0
Depreciation and amortization	0	0	0	0
Expenditures for property, plant & equipment	0	0	0	0
Segment assets	0		0
Goodwill	0		0
Networking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Goodwill	1,012,006		1,012,006		1,048,743
Networking | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	551,099	559,560	1,756,327	1,607,114
Inter-segment revenues	17,759	23,945	54,129	80,666
Operating income (loss)	49,476	54,618	230,497	164,481
Interest expense	0	0	0	0
Other income (expense), net	0	0	0	0
Income tax benefit	0	0	0	0
Net earnings	0	0	0	0
Depreciation and amortization	41,369	44,126	124,384	128,504
Expenditures for property, plant & equipment	6,441	18,363	80,654	53,779
Segment assets	3,435,816		3,435,816
Goodwill	1,012,006		1,012,006
Materials
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Goodwill	273,341		273,341		237,016
Materials | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	323,769	268,164	1,061,809	822,540
Inter-segment revenues	96,604	59,345	277,502	199,202
Operating income (loss)	67,826	61,754	224,633	165,071
Interest expense	0	0	0	0
Other income (expense), net	0	0	0	0
Income tax benefit	0	0	0	0
Net earnings	0	0	0	0
Depreciation and amortization	29,242	28,691	83,804	85,031
Expenditures for property, plant & equipment	78,666	$ 75,939	215,038	$ 142,211
Segment assets	2,275,614		2,275,614
Goodwill	273,341		273,341
Lasers
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Goodwill	3,219,790		3,219,790		$ 0
Lasers | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	365,326		1,136,913
Inter-segment revenues	317		1,400
Operating income (loss)	(49,914)		(337,020)
Interest expense	0		0
Other income (expense), net	0		0
Income tax benefit	0		0
Net earnings	0		0
Depreciation and amortization	90,330		269,948
Expenditures for property, plant & equipment	12,038		47,307
Segment assets	8,406,202		8,406,202
Goodwill	$ 3,219,790		$ 3,219,790