Real Estate Investments (Details) shares in Millions, $ in Billions		12 Months Ended
Mar. 01, 2017 USD ($) property	Dec. 31, 2019 shares
Parent Company [Member]
Business Acquisition [Line Items]
Conversion of Stock, Conversion Ratio		0.45
Stock Issued During Period, Shares, Acquisitions \| shares		65.5
Equity One Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred \| $	$ 5.2
Number of real estate properties acquired	121
Equity One Inc. [Member] \| Partially Owned Properties [Member]
Business Acquisition [Line Items]
Number of real estate properties acquired	8

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477

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