Property, Plant and Equipment and Leasehold Intangibles, Net - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) community	Sep. 30, 2024 USD ($)
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 94.8	$ 90.1	$ 278.6	$ 264.2
Property, plant and equipment and leasehold intangibles, classified as held for sale	68.8		$ 68.8
Assisted Living And Memory Care Segment
Property, Plant and Equipment [Line Items]
Number of communities classified as held for sale | community			4
CCRCs Segment
Property, Plant and Equipment [Line Items]
Number of communities classified as held for sale | community			2
Nonrecurring
Property, Plant and Equipment [Line Items]
Non-cash impairment charges	$ 62.7	$ 0.9	$ 65.1	$ 2.6