Investments in Unconsolidated Entities - Summary of Company's Investments in Unconsolidated Entities (Detail)	3 Months Ended
	Mar. 31, 2025 ft² Property
Income Statement Equity Method Investments [Line Items]
Number of Properties	7
Total GLA | ft²	416,200
Brookfield Properties Retail I [Member]
Income Statement Equity Method Investments [Line Items]
Seritage % Ownership	50.00%
Brookfield Properties Retail II [Member]
Income Statement Equity Method Investments [Line Items]
Seritage % Ownership	50.00%
Number of Properties	1
Total GLA | ft²	93,500
Simon Property Group Inc [Member]
Income Statement Equity Method Investments [Line Items]
Seritage % Ownership	50.00%
Number of Properties	2
Total GLA | ft²	165,000
Invesco Real Estate [Member]
Income Statement Equity Method Investments [Line Items]
Seritage % Ownership	50.00%
Number of Properties	1
Total GLA | ft²	51,500
Invesco Real Estate II [Member]
Income Statement Equity Method Investments [Line Items]
Seritage % Ownership	50.00%
Number of Properties	1
Total GLA | ft²	106,200
RD Management [Member]
Income Statement Equity Method Investments [Line Items]
Seritage % Ownership	50.00%
Number of Properties	1
The Howard Hughes Corporation and Foulger-Pratt [Member]
Income Statement Equity Method Investments [Line Items]
Seritage % Ownership	31.30%
Number of Properties	1