Summary Of Significant Accounting Policies (Summary Of Net Revenue Disaggregated By Product And Region) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net revenue	$ 800,011	$ 736,157	$ 1,551,955	$ 1,417,213
Software As A Service [Member]
Disaggregation of Revenue [Line Items]
Net revenue	91,833	86,706	183,976	173,596
U.S., Canada And Latin America [Member]
Disaggregation of Revenue [Line Items]
Net revenue	518,594	494,672	1,013,890	951,810
U.S., Canada And Latin America [Member] | Devices [Member]
Disaggregation of Revenue [Line Items]
Net revenue	204,997	203,522	402,390	390,409
U.S., Canada And Latin America [Member] | Masks And Other [Member]
Disaggregation of Revenue [Line Items]
Net revenue	221,764	204,444	427,524	387,805
U.S., Canada And Latin America [Member] | Sleep And Respiratory Care [Member]
Disaggregation of Revenue [Line Items]
Net revenue	426,761	407,966	829,914	778,214
U.S., Canada And Latin America [Member] | Software As A Service [Member]
Disaggregation of Revenue [Line Items]
Net revenue	91,833	86,706	183,976	173,596
Combined Europe, Asia And Other Markets [Member] | Devices [Member]
Disaggregation of Revenue [Line Items]
Net revenue	187,992	162,311	364,018	314,236
Combined Europe, Asia And Other Markets [Member] | Masks And Other [Member]
Disaggregation of Revenue [Line Items]
Net revenue	93,425	79,174	174,047	151,167
Combined Europe, Asia And Other Markets [Member] | Sleep And Respiratory Care [Member]
Disaggregation of Revenue [Line Items]
Net revenue	281,417	241,485	538,065	465,403
Global [Member]
Disaggregation of Revenue [Line Items]
Net revenue	800,011	736,157	1,551,955	1,417,213
Global [Member] | Devices [Member]
Disaggregation of Revenue [Line Items]
Net revenue	392,989	365,833	766,408	704,645
Global [Member] | Masks And Other [Member]
Disaggregation of Revenue [Line Items]
Net revenue	315,189	283,618	601,571	538,972
Global [Member] | Sleep And Respiratory Care [Member]
Disaggregation of Revenue [Line Items]
Net revenue	708,178	649,451	1,367,979	1,243,617
Global [Member] | Software As A Service [Member]
Disaggregation of Revenue [Line Items]
Net revenue	$ 91,833	$ 86,706	$ 183,976	$ 173,596