Subsequent Events - Additional Information (Details)			1 Months Ended	3 Months Ended		6 Months Ended
		Jul. 14, 2022 USD ($)	Aug. 02, 2022 USD ($) loan	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Subsequent Event [Line Items]
Total loan commitment				$ 5,186,472,000		$ 5,186,472,000		$ 5,411,944,000
Loans held for investment, net	[1]			4,617,254,000		4,617,254,000		4,867,203,000
Total allowance for credit losses	[1]			84,156,000		84,156,000		41,999,000
Gain on sale of real estate owned				13,291,000	$ 0	13,291,000	$ 0
Mortgage Loan, Retail Property | Real Estate
Subsequent Event [Line Items]
Amortized cost of loan				23,000,000		23,000,000		23,000,000
First Mortgage Loan, Office Property
Subsequent Event [Line Items]
Total allowance for credit losses				11,100,000		11,100,000
First Mortgage Loan, Office Property | Real Estate
Subsequent Event [Line Items]
Amortized cost of loan				55,700,000		55,700,000		$ 55,700,000
Loans held for investment, net				44,600,000		44,600,000
Total allowance for credit losses				$ 11,100,000		$ 11,100,000
Subsequent Events | Mortgage Loan, Retail Property | Borrower, Non-Performing Retail Loan
Subsequent Event [Line Items]
Proceeds from sale of real estate		$ 18,600,000
Disposal Group, Including Discontinued Operation, Consideration		19,700,000
Subsequent Events | Mortgage Loan, Retail Property | Real Estate
Subsequent Event [Line Items]
Gain (Loss) on Sale of Investments		$ 4,400,000
Four First Mortgage | Subsequent Events
Subsequent Event [Line Items]
Number of first mortgage loans originated | loan			7
Total loan commitment			$ 557,100,000
Loan commitment principal amount			$ 513,000,000
First Mortgage Loan | Subsequent Events
Subsequent Event [Line Items]
Number of first mortgage loans originated | loan			2
Total loan commitment			$ 226,600,000
Loan commitment principal amount			$ 226,200,000

[1] The Company’s consolidated Total Assets and Total Liabilities as of June 30, 2022 include assets and liabilities of variable interest entities (“VIEs”) of $3.2 billion and $2.6 billion, respectively. The Company’s consolidated Total Assets and Total Liabilities as of December 31, 2021 include assets and liabilities of VIEs of $3.2 billion and $2.6 billion, respectively. These assets can be used only to satisfy obligations of the VIEs, and creditors of the VIEs have recourse only to these assets, and not to TPG RE Finance Trust, Inc. See Note 5 to the Consolidated Financial Statements for details.