v3.25.3

Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) Property	Sep. 30, 2024 USD ($) Property	Sep. 30, 2025 USD ($) Property	Sep. 30, 2024 USD ($) Property	Dec. 31, 2024 USD ($) Property
Significant Accounting Policies [Line Items]
Investments in real estate, net	$ 17,054,679,000		$ 17,054,679,000		$ 17,830,254,000
Impairments of investments in real estate	$ 5,123,000	$ 1,782,000	$ 5,123,000	$ 1,782,000
Number of hospitality properties \| Property	1	1	1	1
Liabilities	$ 14,451,237,000		$ 14,451,237,000		15,298,384,000
Assets	19,166,092,000		19,166,092,000		20,991,989,000
Fair value of single family rental properties	17,300,000		17,300,000		856,100,000
Carrying value of single family rental properties	17,300,000		17,300,000		855,600,000
Unrealized gains on investments in real estate debt securities		$ 0		$ 5,300,000
Secured financings on investments in real estate debt of fair value below outstanding principal balance	$ 289,700,000		$ 289,700,000		423,300,000
Minimum REIT distribution percentage	90.00%		90.00%
Minimum OECD corporate tax percentage	15.00%		15.00%
Income tax (benefit) expense	$ (1,700,000)	$ 1,900,000	$ (600,000)	$ 8,200,000
Net operating loss carryforwards					$ 93,200,000
Multifamily
Significant Accounting Policies [Line Items]
Number of real estate properties classified as held for sale \| Property					11
Hospitality Properties
Significant Accounting Policies [Line Items]
Number of real estate properties classified as held for sale \| Property	1		1		1
VIEs
Significant Accounting Policies [Line Items]
Liabilities	$ 100,000,000		$ 100,000,000		$ 100,000,000
Assets	$ 0		$ 0		$ 0
DST Properties
Significant Accounting Policies [Line Items]
Number of Real Estate Properties \| Property	2		2		2
Investments in real estate, net	$ 159,000,000		$ 159,000,000		$ 163,000,000
Triple Net Sale and Leaseback Property
Significant Accounting Policies [Line Items]
Deferred tax liability, net	$ 35,200,000		$ 35,200,000		$ 35,500,000

Carrying value of single family rental properties.

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Secured financings on investments in real estate debt of fair value below outstanding principal balance.

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Significant accounting policies.

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Starwood Real Estate Income Trust, Inc. 10-Q