Represents the number of properties sold during the period, not categorized as discontinued operations.

No definition available.

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- Definition

Total consideration, cash and noncash, received by seller for the sale of real estate.

+ References

No definition available.

+ Details

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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
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Balance Type:	credit
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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
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Balance Type:	debit
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

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Real Estate Transactions - 2017 Dispositions (Details)	1 Months Ended		3 Months Ended								12 Months Ended
Real Estate Transactions - 2017 Dispositions (Details)	Mar. 31, 2017 USD ($) facility	Jan. 31, 2017 USD ($) facility	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 facility	Sep. 30, 2018 USD ($) facility	Jun. 30, 2018 USD ($) facility	Mar. 31, 2018 USD ($) facility	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) facility
Real Estate [Line Items]
Gain (loss) on sales of real estate, net			$ 11,000,000	$ 0	$ 11,000,000	$ 8,000,000		$ 95,000,000	$ 25,000,000		$ 22,900,000	$ 925,985,000	$ 356,641,000
Life science
Real Estate [Line Items]
Number of properties disposed \| facility		4						4					1
Total consideration for disposition of real estate		$ 76,000,000
Gain (loss) on sales of real estate, net		$ 45,000,000
Senior housing triple-net
Real Estate [Line Items]
Number of properties disposed \| facility	64								2				4
Total consideration for disposition of real estate	$ 1,125,000,000
Proceeds from sales of real estate													$ 27,000,000
Gain (loss) on sales of real estate, net	$ 170,000,000
SHOP
Real Estate [Line Items]
Number of properties disposed \| facility							2	11	8	2			5
Proceeds from sales of real estate													$ 43,000,000
Gain (loss) on sales of real estate, net										$ 21,000,000
Medical office
Real Estate [Line Items]
Number of properties disposed \| facility								2					4
Proceeds from sales of real estate													$ 15,000,000
Gain (loss) on sales of real estate, net													41,000,000
Land \| Life science
Real Estate [Line Items]
Number of properties disposed \| facility							1
Total consideration for disposition of real estate													27,000,000
Building \| Life science
Real Estate [Line Items]
Proceeds from sales of real estate													$ 5,000,000