Segment Information (Summary of Revenue by Segment and Reconciling Items) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Net revenue by segment	$ 4,685,297	$ 4,222,993	$ 3,578,127
Depreciation and amortization by segment	176,870	165,156	159,609
Net operating profit by segment	1,319,893	1,131,871	1,000,286
Amortization of acquired intangible assets	46,521	42,020	31,078
Restructuring expenses	64,228	9,177	0
Acquisition related expenses	0	10,949	1,864
Interest expense (income), net	(45,708)	(47,379)	(22,312)
Loss attributable to equity method investments	(1,848)	(7,265)	(8,486)
(Gain) loss on equity investments	(4,045)	9,922	(12,202)
Gain on insurance recoveries	0	20,227	0
Other, net	(3,494)	(5,712)	3,197
Income before income taxes	1,264,798	1,101,664	960,483
Operating Segments
Segment Reporting Information [Line Items]
Net operating profit by segment	1,835,804	1,562,775	1,373,347
Corporate Costs
Segment Reporting Information [Line Items]
Depreciation and amortization by segment	80,559	73,493	72,927
Reconciling items
Segment Reporting Information [Line Items]
Corporate costs	357,937	338,362	300,469
Amortization of acquired intangible assets	79,484	72,416	70,728
Restructuring expenses	64,228	9,177	0
Masks with magnets field safety notification expenses	6,351	0	0
Astral field safety notification expenses	7,911	0	0
Acquisition related expenses	0	10,949	1,864
Interest expense (income), net	45,708	47,379	22,312
Loss attributable to equity method investments	1,848	7,265	8,486
(Gain) loss on equity investments	4,045	(9,922)	12,202
Gain on insurance recoveries	0	(20,227)	0
Other, net	3,494	5,712	(3,197)
Income before income taxes	1,264,798	1,101,664	960,483
Sleep and Respiratory Care
Segment Reporting Information [Line Items]
Net revenue by segment	4,101,172	3,725,017	3,177,298
Sleep and Respiratory Care | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization by segment	86,070	82,544	79,367
Net operating profit by segment	1,681,354	1,447,120	1,279,591
Software as a Service
Segment Reporting Information [Line Items]
Net revenue by segment	584,125	497,976	400,829
Operating lease, impairment loss	4,100
Software as a Service | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization by segment	10,241	9,119	7,315
Net operating profit by segment	$ 154,450	$ 115,655	$ 93,756