Impairments of Real Estate	12 Months Ended
Impairments of Real Estate	Dec. 31, 2023
Asset Impairment Charges [Abstract]
Impairments of Real Estate	Impairments of Real Estate 2023 and 2022 During the years ended December 31, 2023 and 2022, the Company did not recognize any impairment charges. 2021 During the year ended December 31, 2021, the Company recognized an aggregate impairment charge of $22 million, which is reported in impairments and loan loss reserves (recoveries), net, related to: (i) three outpatient medical buildings that met the held for sale criteria during the year and (ii) one outpatient medical building held for use; the aggregate fair value of these four outpatient medical buildings was $14 million as of the related impairment assessment dates. For the three outpatient medical buildings that met the held for sale criteria during the year, the Company recognized an impairment charge of $5 million to write down the properties’ aggregate carrying value to their aggregate fair value, less estimated costs to sell. For the outpatient medical building held for use, the Company recognized a $17 million impairment charge in the fourth quarter of 2021 due to the demolition of the outpatient medical building for a future development project. Additionally, during the year ended December 31, 2021, the Company recognized an impairment charge of $4 million related to one SHOP asset, which is reported in income (loss) from discontinued operations. Following a reduction in the expected sales price of the SHOP asset occurring in the second quarter of 2021, the Company wrote down its carrying value of $20 million to its fair value, less estimated costs to sell, of $16 million. The fair values of the impaired assets were based on forecasted sales prices and market comparable data, which are considered to be Level 3 measurements within the fair value hierarchy. These fair values are typically determined using an income approach and/or a market approach (comparable sales model), which rely on certain assumptions by management, including: (i) market capitalization rates, (ii) comparable market transactions, (iii) estimated prices per unit, (iv) negotiations with prospective buyers, and (v) forecasted cash flow streams (primarily lease revenue rates, expense rates, and growth rates). There are inherent uncertainties in making these assumptions. For the Company’s impairment calculations during and as of the year ended December 31, 2021, the Company’s fair value estimates primarily relied on a market approach, which utilized comparable market transactions and negotiations with prospective buyers. Goodwill Impairment When testing goodwill for impairment, if the Company concludes that it is more likely than not that the fair value of a reporting unit is less than its carrying value, the Company recognizes an impairment charge for the amount by which the carrying value, including goodwill, exceeds the reporting unit’s fair value. In connection with the disposition of the Company’s remaining senior housing triple-net and SHOP assets, the Company performed impairment assessments during the year ended December 31, 2021. As a result of these assessments, the Company recognized a $29 million goodwill impairment charge reported in income (loss) from discontinued operations, comprised of the following: (i) a $7 million goodwill impairment charge recognized during the second quarter of 2021, as the fair value of the remaining senior housing triple-net assets (based on forecasted sales prices) was less than the carrying value of the assets, including the related goodwill as of the assessment date and (ii) a $22 million goodwill impairment charge recognized during the third quarter of 2021 to reduce the associated goodwill balance to zero following the sale of the remaining assets within the reporting units associated with the senior housing triple-net and SHOP portfolios. During the years ended December 31, 2023, 2022, and 2021, the fair value of the assets within each of the Company’s other reporting units was greater than the respective carrying value of the assets and related goodwill, and as a result, no impairment charges were recognized with respect to the other reporting units. These fair value estimates primarily relied on a market approach, utilizing comparable market transactions, forecasted sales prices, and negotiations with prospective buyers. These estimates are considered to be Level 3 measurements within the fair value hierarchy, and are subject to inherent uncertainties. Casualty-Related Charges During the years ended December 31, 2023, 2022, and 2021, the Company recognized $(3) million, $6 million, and $5 million, respectively, of net casualty-related charges (recoveries). During the year ended December 31, 2023, such recoveries were primarily attributable to proceeds received for water damage at an outpatient medical building. During the year ended December 31, 2022, such charges were primarily attributable to damages as a result of Hurricane Ian. During the year ended December 31, 2021, such charges were primarily due to fire damage at one of the properties in the SWF SH JV and winter storm Uri. Casualty-related charges are recognized in other income (expense), net and equity income (loss) from unconsolidated joint ventures in the Consolidated Statements of Operations. Also during the years ended December 31, 2023, 2022, and 2021, the Company collected business interruption proceeds of $4 million, $3 million, and zero, respectively, which are recognized in rental and related revenues and resident fees and services on the Consolidated Statements of Operations. Other Losses During the year ended December 31, 2022, the Company recognized $14 million of expenses within other income (expense), net on the Consolidated Statements of Operations for tenant relocation and other costs associated with the demolition of an outpatient medical building. See Note 7 for information related to the Company’s reserve for loan losses.