Investments in Real Estate - Additional Information (Detail) $ in Billions	3 Months Ended
Mar. 31, 2021 USD ($) Property Investment	Sep. 30, 2020 Property
Real Estate Properties [Line Items]
Number of real estate investments acquired \| Investment	11
Number of real estate properties acquired	11
Number of real estate properties classified as held for sale	1	0
In-place Lease Intangibles [Member]
Real Estate Properties [Line Items]
Weighted-average acquired lease intangibles	6 years
Below-market Lease Intangibles [Member]
Real Estate Properties [Line Items]
Weighted-average acquired lease intangibles	7 years
11 Real Estate Investments [Member]
Real Estate Properties [Line Items]
Payments to acquire real estate \| $	$ 0.4
Industrial [Member]
Real Estate Properties [Line Items]
Number of real estate properties acquired	7
Multifamily [Member]
Real Estate Properties [Line Items]
Number of real estate properties acquired	4

Number of real estate investments acquired during the period.

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- Definition

Number of real estate properties classified as held for sale.

+ References

No definition available.

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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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 cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585

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- 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.

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