Organization	12 Months Ended
Dec. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization	Note 1 – Organization Seritage Growth Properties was organized in Maryland on June 3, 2015 and initially capitalized with 100 shares of Class A common shares. The Company conducts its operations through Seritage Growth Properties, L.P. (the “Operating Partnership”), a Delaware limited partnership that was formed on April 22, 2015. Unless the context otherwise requires, “Seritage” and the “Company” refer to Seritage Growth Properties, the Operating Partnership and its subsidiaries. On June 11, 2015 Sears Holdings Corporation (“Sears Holdings”) effected a rights offering (the “Rights Offering”) to Sears Holdings stockholders to purchase common shares of Seritage in order to fund, in part, the $2.7 billion acquisition of 234 of Sears Holdings’ owned properties and one of its ground leased properties (the “Wholly Owned Properties”), and its 50% interests in three joint ventures (such joint ventures, the “JVs,” and such 50% joint venture interests the “JV Interests”) that collectively own 28 properties, ground lease one property and lease two properties (collectively, the “Original JV Properties”) (collectively, the “Transaction”). The Rights Offering ended on July 2, 2015 and the Company’s Class A common shares were listed on the New York Stock Exchange (“NYSE”) on July 6, 2015. On July 7, 2015, the Company completed the Transaction with Sears Holdings and commenced operations. The Company did not have any operations prior to the completion of the Rights Offering and Transaction. During the year ended December 31, 2017, the Company completed transactions whereby it (i) sold its 50% JV Interests in 13 Original JV Properties and (ii) sold a 50% interest in five Wholly Owned Properties and retained a 50% interest in five new joint venture properties (the “New JV Properties” and, together with the Original JV Properties, the “JV Properties”). Seritage is a fully-integrated, self-administered, self-managed real estate investment trust (“REIT”) primarily engaged in the real property business through the Company’s investment in the Operating Partnership. As of December 31, 2017, our portfolio consisted of approximately 39.4 million square feet of gross leasable area (“GLA”), including 230 wholly owned properties totaling approximately 35.2 million square feet of GLA across 49 states and Puerto Rico, and interests in 23 joint venture properties totaling over 4.2 million square feet of GLA across 13 states. As of December 31, 2017, we leased space at 148 Wholly Owned Properties to Sears Holdings under the Master Lease, including 76 properties leased only to Sears Holdings and 72 properties leased to both Sears Holdings and one or more third-party tenants. The remaining 92 Wholly Owned Properties include 51 properties that are leased solely to third-party tenants and do not have any space leased to Sears Holdings, and 31 vacant properties. As of December 31, 2017, space at 22 JV Properties is also leased to Sears Holdings by, as applicable, the GGP JVs, the Simon JV or the Macerich JV, in each case under a separate JV Master Lease. Sears Holdings is the sole tenant at nine JV properties and 13 JV properties are leased to both Sears Holdings and one or more third-party tenants. One JV Property was vacant as of December 31, 2017. The Master Lease and the JV Master Leases provide the Company and the JVs with the right to recapture certain space from Sears Holdings at each property for retenanting or redevelopment purposes.

Note 1 – Organization

Seritage Growth Properties was organized in Maryland on June 3, 2015 and initially capitalized with 100 shares of Class A common shares. The Company conducts its operations through Seritage Growth Properties, L.P. (the “Operating Partnership”), a Delaware limited partnership that was formed on April 22, 2015. Unless the context otherwise requires, “Seritage” and the “Company” refer to Seritage Growth Properties, the Operating Partnership and its subsidiaries.

On June 11, 2015 Sears Holdings Corporation (“Sears Holdings”) effected a rights offering (the “Rights Offering”) to Sears Holdings stockholders to purchase common shares of Seritage in order to fund, in part, the $2.7 billion acquisition of 234 of Sears Holdings’ owned properties and one of its ground leased properties (the “Wholly Owned Properties”), and its 50% interests in three joint ventures (such joint ventures, the “JVs,” and such 50% joint venture interests the “JV Interests”) that collectively own 28 properties, ground lease one property and lease two properties (collectively, the “Original JV Properties”) (collectively, the “Transaction”). The Rights Offering ended on July 2, 2015 and the Company’s Class A common shares were listed on the New York Stock Exchange (“NYSE”) on July 6, 2015.

On July 7, 2015, the Company completed the Transaction with Sears Holdings and commenced operations. The Company did not have any operations prior to the completion of the Rights Offering and Transaction.

During the year ended December 31, 2017, the Company completed transactions whereby it (i) sold its 50% JV Interests in 13 Original JV Properties and (ii) sold a 50% interest in five Wholly Owned Properties and retained a 50% interest in five new joint venture properties (the “New JV Properties” and, together with the Original JV Properties, the “JV Properties”).

Seritage is a fully-integrated, self-administered, self-managed real estate investment trust (“REIT”) primarily engaged in the real property business through the Company’s investment in the Operating Partnership. As of December 31, 2017, our portfolio consisted of approximately 39.4 million square feet of gross leasable area (“GLA”), including 230 wholly owned properties totaling approximately 35.2 million square feet of GLA across 49 states and Puerto Rico, and interests in 23 joint venture properties totaling over 4.2 million square feet of GLA across 13 states.

As of December 31, 2017, we leased space at 148 Wholly Owned Properties to Sears Holdings under the Master Lease, including 76 properties leased only to Sears Holdings and 72 properties leased to both Sears Holdings and one or more third-party tenants. The remaining 92 Wholly Owned Properties include 51 properties that are leased solely to third-party tenants and do not have any space leased to Sears Holdings, and 31 vacant properties. As of December 31, 2017, space at 22 JV Properties is also leased to Sears Holdings by, as applicable, the GGP JVs, the Simon JV or the Macerich JV, in each case under a separate JV Master Lease. Sears Holdings is the sole tenant at nine JV properties and 13 JV properties are leased to both Sears Holdings and one or more third-party tenants. One JV Property was vacant as of December 31, 2017.

The Master Lease and the JV Master Leases provide the Company and the JVs with the right to recapture certain space from Sears Holdings at each property for retenanting or redevelopment purposes.