As of the reporting date, the carrying amount of noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. The noncontrolling interest holder's ownership (or holders' ownership) may be in the form of preferred shares (regardless of class), preferred partnership units (regardless of class), preferential membership interests, or any other form of preferred equity regardless of investee entity legal form.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section S99
-Paragraph 3A
-Subparagraph 14
-URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section S99
-Paragraph 3A
-Subparagraph (12)(c)
-URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section S99
-Paragraph 3A
-Subparagraph 15
-URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section S99
-Paragraph 3A
-Subparagraph (16)(c)
-URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Investments in and Advances to Joint Ventures - Summary of Preferred investments (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) ShoppingCenter	Dec. 31, 2018 USD ($)	Dec. 31, 2015 USD ($)	Oct. 31, 2014 USD ($)
Schedule Of Equity Method Investments [Line Items]
Preferred Investment, Valuation Allowance	$ (87.9)	$ (72.4)
BRE DDR III [Member]
Schedule Of Equity Method Investments [Line Items]
Redemption Date	2021
Preferred Investment (Principal)	$ 132.4			$ 300.0
Preferred Investment, Valuation Allowance	(78.2)
Preferred Investment, Net of Reserve	$ 54.2
Properties Owned \| ShoppingCenter	13
BRE DDR IV [Member]
Schedule Of Equity Method Investments [Line Items]
Redemption Date	2022
Preferred Investment (Principal)	$ 64.0		$ 82.6
Preferred Investment, Valuation Allowance	(9.7)
Preferred Investment, Net of Reserve	$ 54.3
Properties Owned \| ShoppingCenter	5
BRE DDR III and IV [Member]
Schedule Of Equity Method Investments [Line Items]
Preferred Investment (Principal)	$ 196.4		$ 382.6
Preferred Investment, Valuation Allowance	(87.9)
Preferred Investment, Net of Reserve	$ 108.5