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Investment Activity (Impairments of Long-Lived Assets Narrative) (Details) - Senior Living Campuses - Disposal Group, Held-for-sale, Not Discontinued Operations - 2025 Disposal Group $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)
Real Estate [Line Items]
Purchase price	$ 38.5
Lease income, annual rent	2.8
Net real estate balance	$ 18.9

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