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Acquisitions and Dispositions of Properties - Disposition of Properties to Digital Core REIT (Details) |  |  |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 13, 2022 USD ($) | Aug. 08, 2022 | Dec. 06, 2021 USD ($) property | Jan. 31, 2020 | Nov. 30, 2019 | Sep. 30, 2021 | Mar. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property | Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property | Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property | Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property | Income (Loss) from Equity Method Investments | Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property
Ownership interest in DCRU operating properties |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Percentage of retained investment in properties |  |  | 10.00% |  |  |  |
Ownership interest in operating properties |  |  | 10.00% |  |  |  |
Data center facility in Frankfurt, Germany |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Gain on disposition of properties | $ 0 |  |  |  |  |  |
Ownership interest held in operating properties sold | 25.00% |  |  |  |  |  |
Consideration on sale of ownership | $ 146,000,000 |  |  |  |  |  |
Amount loaned to the consolidated subsidiary that owns the data center | $ 79,800,000 |  |  |  |  |  |
Digital Core REIT (DCRU) |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Cash received |  |  | $ 919,100,000 |  |  |  |
Fair market value of retained investment in SREIT |  |  | 521,400,000 |  |  |  |
Acquisition fees paid in Digital Core REIT units |  |  | 13,000,000.0 |  |  |  |
Tax on acquisition fees |  |  | 3,000,000.0 |  |  |  |
Net book value of assets contributed |  |  | 439,300,000 |  |  |  |
Gain on disposition of properties |  |  | $ 1,011,200,000 |  |  |  |
Digital Core REIT (DCRU) | Ownership interest in DCRU operating properties |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Number of properties, classified as held for sale | property |  |  | 10 |  |  |  |
Cash received |  |  | $ 919,000,000 |  |  |  |
Fair market value of retained investment in SREIT |  |  | 1,400,000,000 |  |  |  |
Acquisition fees paid in Digital Core REIT units |  |  | $ 13,000,000 |  |  |  |
Percentage of retained investment in properties |  |  | 10.00% |  |  |  |
Ownership interest in operating properties |  |  | 39.40% |  |  |  |

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