Real Estate Acquisitions and Dispositions (Details) - Consolidated properties - Retail properties - Disposed of by Sales And Means Other than Sale $ in Millions	12 Months Ended
Dec. 31, 2021 USD ($) property
Dispositions
Nets gains on disposition	$ 176.8
Number of properties disposed of during the period \| property	3
Non-recourse $180M Mortgage
Dispositions
Non-recourse mortgage	$ 180.0
Non-recourse $120.9M Mortgage
Dispositions
Non-recourse mortgage	120.9
Non-recourse $100M Mortgage
Dispositions
Non-recourse mortgage	$ 100.0

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2443-110228

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration