Apartment homes sold.

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Gross amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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Number Of Apartment Homes Owned And Consolidated By Company

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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- Definition

The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.

+ References

Reference 1: 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=118932676&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(b)(9)(a))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 360
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=117337411&loc=d3e23528-158515

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(b)(7)(c))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(14)(d))
-URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260

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-Publisher FASB
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-SubTopic 360
-Section 45
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-URI http://asc.fasb.org/extlink&oid=117337397&loc=d3e23439-158514

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(3)(a))
-URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 360
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=117337397&loc=d3e23415-158514

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

The number of states the entity operates in as of the balance sheet date.

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No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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REAL ESTATE OWNED (UNITED DOMINION REALTY, L.P.) - Other Information (Details) $ in Millions	1 Months Ended
	Feb. 28, 2019 USD ($) item	Dec. 31, 2018 USD ($) item	Feb. 28, 2018 USD ($) home	Dec. 31, 2017 USD ($) community	Dec. 31, 2019 state home community
Real estate properties
Number of apartment homes owned and consolidated \| home					47,010
Number of real estate properties \| community					148
Number of states in which there are owned and consolidated communities \| state					13
United Dominion Realty L.P.
Real estate properties
Number of apartment homes owned and consolidated \| home					16,434
Number of real estate properties \| community					52
Number of states in which there are owned and consolidated communities \| state					9
Orange County and Carlsbad Properties
Real estate properties
Apartment homes sold \| community				218
Net proceeds from sale of properties				$ 69.0
Gain on sale of real estate owned				$ 41.3
ORANGE COUNTY, CA
Real estate properties
Apartment homes sold \| item	264
Net proceeds from sale of properties	$ 90.5
Gain on sale of real estate owned	$ 70.3
ORANGE COUNTY, CA \| United Dominion Realty L.P.
Real estate properties
Apartment homes sold \| home			264
Net proceeds from sale of properties			$ 90.5
Gain on sale of real estate owned			$ 70.3
Fairfax, VA
Real estate properties
Apartment homes sold \| item		604
Net proceeds from sale of properties		$ 160.0
Gain on sale of real estate owned		65.9
Fairfax, VA \| United Dominion Realty L.P.
Real estate properties
Gross proceeds from sale of properties		9.3
Gain on sale of real estate owned		$ 5.2