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Real Estate - Real Estate Investments (Details) $ in Millions | 1 Months Ended
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Jan. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | May 31, 2022 USD ($) property | Mar. 31, 2022 USD ($) property | Jan. 31, 2022 USD ($)
Life Science | MASSACHUSETTS |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Payments to acquire real estate | $ 9 | $ 18 |  |  | $ 72
Life Science | CALIFORNIA |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Payments to acquire real estate |  |  |  |  | $ 24
Medical Office Buildings | TEXAS |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Payments to acquire real estate |  |  |  | $ 43 |
Number of properties acquired | property |  |  |  | 2 |
Medical Office Buildings | ARKANSAS |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Payments to acquire real estate |  |  | $ 26 |  |
Number of properties acquired | property |  |  | 1 |  |

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- Definition The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3213-108585 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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