Segment Information (Summary Of Revenue By Segment And Reconciling Items) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenues		$ 662,228	$ 591,634	$ 1,901,608	$ 1,716,566
Operating Income (Loss)		156,977	136,373	458,187	394,947
Amortization of acquired intangible assets		22,794	11,673	51,501	34,772
Restructuring expenses			10,922		10,922
Acquisition related expenses				6,123
Interest income		(415)	(4,228)	(2,014)	(13,677)
Interest expense		12,413	7,719	23,608	22,873
Loss attributable to equity method investments		(5,996)		(9,371)
Other, net		(1,054)	(2,739)	(4,140)	(5,357)
Income before income taxes		137,929	130,143	423,082	380,394
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)		210,700	187,900	615,200	521,000
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Deferred revenue fair value adjustment	[1]	(2,300)		(4,300)
Corporate costs		28,600	29,000	95,100	80,300
Amortization of acquired intangible assets		22,800	11,700	51,500	34,800
Acquisition related expenses				6,100
Deferred revenue fair value adjustment	[1]	2,300		4,300
Interest income		(400)	(4,200)	(2,000)	(13,700)
Interest expense		12,400	7,700	23,600	22,900
Loss attributable to equity method investments		6,000		9,400
Other, net		1,100	2,700	4,100	5,400
Income before income taxes		137,900	130,100	423,100	380,400
Devices [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues		336,500	328,200	1,003,200	951,500
Masks And Other [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues		245,800	223,500	707,800	648,500
Total Sleep And Respiratory Care [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues		582,300	551,700	1,711,000	1,600,000
Operating Income (Loss)		190,200	173,800	562,500	480,700
Software As A Service Before Deferred Revenue Adjustment [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues		82,200	39,900	194,900	116,600
Software As A Service [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Deferred revenue fair value adjustment		(2,300)		(4,300)
Revenues		79,900	39,900	190,600	116,600
Operating Income (Loss)		20,500	$ 14,100	52,700	$ 40,300
Deferred revenue fair value adjustment		$ 2,300		$ 4,300

[1] The deferred revenue fair value adjustment is a purchase price accounting adjustment related to MatrixCare which was acquired on November 13, 2018.