Organization - Additional Information (Detail) $ in Billions				9 Months Ended
	Jul. 11, 2015 USD ($) Property JointVenture RetailFacility	Jul. 06, 2015 USD ($)	Jun. 03, 2015 shares	Sep. 30, 2016 Property
Organization And Basis Of Presentation [Line Items]
Operations Commenced Date				Jul. 07, 2015
Sears Holdings Corporation [Member]
Organization And Basis Of Presentation [Line Items]
Business acquisition fair value, purchase price | $	$ 2.7	$ 2.7
Number of real estate properties acquired | Property	234
Number of ground leased properties acquired | Property	1
Interests in joint ventures acquired	50.00%
Number of joint venture acquired | JointVenture	3
Number of Wholly Owned Properties not lease back to Sears Holdings | Property				14
Sears Holdings Corporation [Member] | Joint Venture [Member]
Organization And Basis Of Presentation [Line Items]
Number of retail facilities | RetailFacility	28
Number of retail facilities subject to ground lease | RetailFacility	1
Number of retail facilities subject to lease | RetailFacility	2
Class A Common Shares [Member]
Organization And Basis Of Presentation [Line Items]
Number of shares initially capitalized | shares			100