Goodwill and Identifiable Intangible Assets - Change in Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Goodwill [Roll Forward]
Beginning balance	$ 2,675,166
Goodwill from acquisitions (note 3)	15,651
Goodwill from dispositions (note 4)	(39,732)
Other	2,316
Ending balance	2,653,401
Assets	4,383,523	$ 4,486,947
Goodwill	2,653,401	2,675,166
Subsidiaries | Joint Venture
Goodwill [Roll Forward]
Ending balance	2,300
Assets	3,000
Goodwill	2,300
Sleep Health
Goodwill [Roll Forward]
Beginning balance	1,581,039
Goodwill from acquisitions (note 3)	8,179
Goodwill from dispositions (note 4)	0
Other	1,151
Ending balance	1,590,369
Goodwill	1,590,369	1,581,039
Respiratory Health
Goodwill [Roll Forward]
Beginning balance	676,747
Goodwill from acquisitions (note 3)	2,650
Goodwill from dispositions (note 4)	0
Other	225
Ending balance	679,622
Goodwill	679,622	676,747
Diabetes Health
Goodwill [Roll Forward]
Beginning balance	211,796
Goodwill from acquisitions (note 3)	0
Goodwill from dispositions (note 4)	0
Other	0
Ending balance	211,796
Goodwill	211,796	211,796
Wellness at Home
Goodwill [Roll Forward]
Beginning balance	205,584
Goodwill from acquisitions (note 3)	4,822
Goodwill from dispositions (note 4)	(39,732)
Other	940
Ending balance	171,614
Goodwill	$ 171,614	$ 205,584