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v3.25.2

Summary of Significant Accounting Policies - Schedule of Gain on Sale of Real Estate (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Dispositions to third parties |  |  |  |
Gross proceeds | $ 23.0 | $ 40.4 | $ 52.6 | $ 87.7
Gain on sale of real estate, net | $ 2.0 | $ 2.0 | $ 8.9 | $ 3.2

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- Definition Dispositions to third parties abstract. + References No definition available. + Details
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Namespace Prefix: | srg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The cash inflow from the sale of real estate from discontinued operations. + References No definition available. + Details
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Namespace Prefix: | srg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Amount of difference between the carrying amount and the sales price of real estate properties sold as part of discontinued operations. + References No definition available. + Details
Name: | us-gaap_GainLossOnDispositionOfRealEstateDiscontinuedOperations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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