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Investment Activity (Impairments of Long-Lived Assets Narrative) (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($) property | Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($) property
Investments |  |  |  |
Real Estate [Line Items] |  |  |  |
Impairment of real estate |  | $ 0.7 |  | $ 0.7
Number of real estate properties, impaired, sold or classified as held for sale | property |  | 1 |  | 1
Senior Living Campuses | Disposal Group, Held-for-sale, Not Discontinued Operations | 2025 Disposal Group |  |  |  |
Real Estate [Line Items] |  |  |  |
Purchase price | $ 39.0 |  | $ 39.0 |
Rental income | 0.7 | $ 0.7 | 1.4 | $ 1.4
Net real estate balance | $ 18.8 |  | $ 18.8 |

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